sailboat solar panel wind generator

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Solar Panels vs. Wind Generators

As the worlds largest solar-powered boat heads toward Miami for its U.S. debut and the start of a 16-city world tour, I was reminded of one of the most frequent questions I hear from Practical Sailor readers: “Which is best, solar panels or a wind generator?” The answer, like many things regarding cruising equipment, depends on where you cruise and the type of boat you own.

The MS Turanor PlanetSolar , the worlds largest solar-powered yacht ever constructed, offers a persuasive case for solar power. The sun-powered, 102-foot catamaran, which recently broke its existing Guinness World Record for completing the fastest trans-Atlantic crossing with a solar boat (22 days), docks in Miami later this week. Stops in New York and Boston are also included in its 2013 itinerary . Following its U.S. visit, the vessel will set sail on a trans-Atlantic, scientific expedition to study climate change.

For most U.S. sailors contemplating investing in renewable energy sources for the first time, it makes sense to buy a solar panel before a wind generator. For about $700, you can buy a pair of 60-watt panels that can generate about 240 watt-hours or 20 amp hours (assuming four hours of peak sunlight). This won’t cover the amp-hour requirements of a modern cruising boat, however. (To roughly convert a solar panel’s watt rating to amp-hours per day, marine technical author Nigel Calder offers the formula: amp-hours per day at 12 volts = the panel’s rated wattage 3.) Although wind generators can deliver more than double this output during a 24-hour period, many U.S. anchorages and marinas don’t have the consistently breezy conditions they require to reach their potential. That conclusion was borne out during our long-term test of five models on a hilltop in Rhode Island, a relatively windy U.S. location, during the mid-1990s. Testers then came to the dismaying conclusion that over the long haul, an average 50-watt solar panel would outperform the units we tested.

Results were different in 2007, when we simultaneously tested five wind generators through a breezy Chesapeake Bay winter. The results of that wind generator test (accessible only to subscribers) and an article on choosing a wind generator based on that test offer a more optimistic view of wind energy. As the results of the 2007 test demonstrate, in windy areas such as the Caribbean, wind generators can do a much better job of keeping up with the demands of 12-volt refrigeration, usually the biggest energy hog on a cruising boat.

Ultimately, which system will be most efficient for you depends greatly on the region you intend to cruise. Although many long-term cruisers making a loop through the Caribbean do just fine with solar alone, those with high energy demands find that supplementing solar with wind energy offers the best opportunity for keeping batteries charged 24/7.

There are several websites that discuss the pros and cons of these alternative energy sources from a sailors perspective. EMarine, a company that sells both solar panels and wind generators, offers a cut-and-dried comparison of solar vs. wind . Although the article is based on some generic assumptions that may or may not apply to your cruising region, it offers a concise look at the pros and cons. Nigel Calders “ Boatowners Mechanical and Electrical Manual ” offers a more detailed discussion of these two systems. Last year’s blog update on solar panels also includes a number of links to Practical Sailor articles on solar trickle chargers, using multi-point power technology to boost solar panel output, tips on prolonging lead-acid battery life, and options for mounting high-output installation.

If you can look past the obvious sales pitch, West Marines West Advisor on solar panels also offers a good overview of solar systems for marine use . Although it has been a while since we have looked at solar panels, we are not big fans of flexible panels. If you are seriously in the market for a solar panel, look for rigid panels with 20-plus-year warranties. Since much of the appeal of solar panels is their durability, we would be interested in hearing about readers experiences with specific brands of solar panels over the long haul in the comments section below.

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The role of solar panels and wind generators on a sailboat

Discover the benefits of using solar panels and wind generators on your sailboat and how they can provide a clean, sustainable, and reliable source of power for your journey.

The Role of Solar Panels and Wind Generators on a Sailboat

Sailing is an incredible way to explore the world, connect with nature, and spend quality time with your family. As you embark on this exciting journey, it’s essential to equip your sailboat with the right tools and equipment to ensure a safe and enjoyable experience. One of the most critical aspects of sailing is having a reliable and sustainable source of power. In this article, we will discuss the role of solar panels and wind generators on a sailboat, their benefits, and how to choose the right system for your needs.

Table of Contents

Why solar panels and wind generators are essential for sailboats, benefits of solar panels on a sailboat, benefits of wind generators on a sailboat, choosing the right solar panels for your sailboat, choosing the right wind generator for your sailboat, combining solar panels and wind generators for optimal power generation.

As you set sail on your adventure, you’ll quickly realize that having a reliable source of power is crucial for your sailboat’s operation and your comfort. Modern sailboats rely on electricity for various purposes, such as navigation, communication, lighting, and powering appliances. Traditional power sources like diesel generators can be noisy, expensive, and harmful to the environment. Solar panels and wind generators offer a clean, quiet, and sustainable alternative to generate electricity on your sailboat.

Solar panels are an excellent choice for generating electricity on a sailboat. They harness the sun’s energy and convert it into electricity, which can be used to power your boat’s systems and appliances. Here are some of the benefits of using solar panels on your sailboat:

Clean and sustainable energy source : Solar panels produce electricity without emitting harmful greenhouse gases, making them an eco-friendly option for your sailboat.

Low maintenance : Solar panels require minimal maintenance, as they have no moving parts. A simple cleaning of the panels every few months is usually sufficient to keep them in good working condition.

Silent operation : Unlike diesel generators, solar panels operate silently, allowing you to enjoy the peacefulness of the open sea.

Cost-effective : Although the initial investment for solar panels can be high, they can save you money in the long run by reducing fuel costs and generator maintenance expenses.

Flexible installation options : Solar panels come in various sizes and shapes, allowing you to install them on different parts of your sailboat, such as the deck, bimini, or davits.

Wind generators are another excellent option for generating electricity on a sailboat. They use the power of the wind to spin a turbine, which generates electricity. Here are some of the benefits of using wind generators on your sailboat:

Clean and sustainable energy source : Like solar panels, wind generators produce electricity without emitting harmful greenhouse gases.

Works day and night : Unlike solar panels, wind generators can produce electricity both during the day and at night, as long as there is sufficient wind.

Complementary to solar panels : Wind generators can be an excellent complement to solar panels, as they can produce electricity when solar panels are not generating power due to cloudy weather or at night.

Cost-effective : While wind generators can be more expensive than solar panels, they can still save you money in the long run by reducing fuel costs and generator maintenance expenses.

Easy to install : Wind generators can be easily installed on your sailboat’s mast or arch, making them a convenient option for power generation.

When selecting solar panels for your sailboat, consider the following factors:

Power requirements : Determine your sailboat’s daily power consumption to choose the right size and number of solar panels.

Type of solar panels : There are three main types of solar panels: monocrystalline, polycrystalline, and thin-film. Monocrystalline panels are the most efficient but also the most expensive. Polycrystalline panels are less efficient but more affordable, while thin-film panels are the least efficient but offer the most flexibility in terms of installation.

Space availability : Consider the available space on your sailboat for installing solar panels. Flexible solar panels can be a good option if you have limited space or irregular surfaces.

Budget : Determine your budget for solar panels and choose a system that meets your power requirements without breaking the bank.

When selecting a wind generator for your sailboat, consider the following factors:

Power requirements : Determine your sailboat’s daily power consumption to choose the right size and type of wind generator.

Wind conditions : Consider the average wind conditions in the areas where you plan to sail. Some wind generators perform better in low-wind conditions, while others are more suitable for high-wind areas.

Noise level : Some wind generators can be noisy, which can be a concern if you value peace and quiet on your sailboat. Look for wind generators with low noise levels.

Budget : Determine your budget for a wind generator and choose a system that meets your power requirements without breaking the bank.

For the best results, consider combining solar panels and wind generators on your sailboat. This combination allows you to harness the power of both the sun and the wind, ensuring a more reliable and consistent source of electricity. When one system is not generating power, the other can compensate, providing you with the energy you need to power your sailboat’s systems and appliances.

To combine solar panels and wind generators effectively, consider the following tips:

Balance power generation : Ensure that both systems can generate enough power to meet your sailboat’s daily power consumption.

Optimize space : Install solar panels and wind generators in a way that maximizes space efficiency and minimizes shading or interference between the two systems.

Integrate with your boat’s electrical system : Use a charge controller and battery bank to store and distribute the electricity generated by both systems.

Solar panels and wind generators play a crucial role in providing clean, sustainable, and reliable power for your sailboat. By understanding their benefits and choosing the right systems for your needs, you can ensure a safe and enjoyable sailing experience for you and your family. Combining solar panels and wind generators can offer the best of both worlds, providing you with a consistent source of electricity to power your sailboat’s systems and appliances. So, as you embark on your sailing adventure, consider investing in solar panels and wind generators to make your journey more eco-friendly, cost-effective, and enjoyable.

Sailboat Wind Generators: The Ultimate Guide 2024

Sailboat wind generators are a way to capture the energy of the wind and use it to charge your batteries and power electronics aboard your vessel.

A large part of the appeal of living on a sailboat, for many people, is being more or less self-sufficient – using the wind for propulsion, and the elements to generate all the power you need.

Solar panels are a wonderful technology, literally magic, but the sun doesn’t shine every day. In fact, of the most popular cruising grounds in the world aren’t even that sunny. It rains three to four days a week in Barbados or Antigua, for example (don’t even get us started on the English Channel).

And what about night sailing – keeping critical loads like autopilots and instruments online after the sun goes down?

A marine wind generator fills in those vital gaps in the energy picture, and eliminates the need to generate or run the engines to keep your electronics online.

In this expert guide we take a deep dive into sailboat wind generators, covering everything you need to know – from how they work through to the very latest technological advances.

With thousands and thousands of miles under the keel, we have lived off-grid using technologies just like this for almost a decade now. We’ve rewired more boats than anyone should ever have to. We’re marine electronics nerds, basically, and specifically very passionate about renewables like wind and solar.

That’s why we couldn’t wait to write about this topic, and why you’ve got a good 4000 words on it! Sorry about that! But feel free to skip and just read the information you’re interested in, we don’t blame you!

So, let’s take a close look at sailboat wind generators, how they work, what makes a good one, the best sailboat wind generators that we think deserve a place on your next nautical expedition.

As an Amazon Associate, we earn from qualifying purchases. We also earn from other affiliate programs. This means we may receive a small commission on products purchased through our links at no extra cost to you.

Table of Contents

The best sailboat wind generators – best budget choice, the best sailboat wind generators – best overall, what is a sailboat wind generator, why install a wind generator on a sailboat, wind generators vs solar power.

• What is a dump load on a marine wind generator ?
• Marine wind generators vs hydro generators

Our top budget choice: Nature Power 500

If you are in the US, the choice for the best budget marine wind generator is easy – it’s this guy , the Nature Power 500, which West Marine have sold for donkey’s years with eternally solid reviews.

It’s a 500-watt turbine that is natively compatible with both 12V and 24VDC systems. It’s made from marine-grade aluminium that’s also coated in a thick, durable coating to help it withstand years at sea.

This wind generator is rated for winds up to 110mph – well into hurricane territory – and it comes as a complete kit including a charge controller using the latest MPPT technology. The controller even has an electronic brake, even though it’s a manual one.

Honestly, this is just a lot of value for the ~$700 they’re asking, and very easy to recommend for the best budget sailboat wind generator.

We don’t massively recommend most of the budget options on Amazon for extended cruising – they’re just not built for the task. But if it’s all your budget will stretch to, something like a Pikasola 400 would be the best bet for a sailboat wind generator under $500.

Readers in the UK or Europe could look at something like a Rutl and 914i . You’ll pay a little more, around £850, but a Rutland is a proper piece of kit – they’re been manufacturing marine wind generators since the 1970’s, long before solar panels were even seen on pleasure yachts.

The 914i will produce about 260 watts in 30 knots of breeze, or 20+ amps into a 12-volt battery. In a hurricane it’ll make over 400 watts.

This is a genuine marine wind turbine built from quality parts and specifically designed for the aggressive saltwater environment. It comes with very few compromises, from the bundled MPPT tracker to its extremely quiet operation.

The charge controller supports a small solar panel as well, which is sort of nice – but we’d highly recommend using a top-quality, stand-alone MPPT charge controller for any solar panels if you can possibly afford it.   

If you are in Europe, or can import, we think the Silentwind Pro is probably the best sailboat wind generator you can buy right now. This is with the caveat that while we’ve seen these installed on lots of different yachts, talked to multiple long-term owners, and even handled one out of the box, we’ve never actually owned one.

That’s because they start at about €2,100, which is a considerable sum for a 420w wind generator. But what you do get is an incredibly refined package – one that picks up and starts generating with as little as four knots of breeze, and remains whisper-quiet right up into the high RPMs.

The Silentwind Pro uses hand-laminated carbon blades that are rated to withstand hurricane-speed winds, but that are also highly efficient across the curve. This is definitely one of the most engineered solutions on the market today.

The polished package is rounded out by features like an automatic electronic brake that kicks in if the wind exceeds a certain speed. Cheaper options may have an electronic brake but it generally has to be tripped manually by the crew.

Models without an electronic brake of any kind are frankly dangerous, because you have to lasso them to stop them – which is how the gentleman broke his arm, and wind generator, in the earlier example.

Other than Silent Wind, there are a few slightly cheaper options that are still very good. For readers in the US, one option made locally is the Air Silent X made by Primus Wind Power. We don’t have as much experience with these, but we have met a couple of happy owners and have heard similar things to Silentwind.

Primus claim they have the bestselling wind turbines anywhere in the world; we’re not sure about that given that Marlec / Rutland have been around nearly two decades longer, but either way their site states they’ve sold more than 150,000 wind generators since ’95, into over a hundred countries.

Primus make six different models at different price points that are all potentially worthy of consideration, but the Air X Silent or Air Breeze are both solid choices.

Rutland wind generators also remain easy to recommend across the board, particularly to readers in the UK and Europe, and a premium option would be something like a Rutland 1200 .

At around £1,500, or $1900, the Rutland 1200 can produce up to 480W flat out, and will hit 300W in only 20 knots or so of breeze. It’s a proper marinized unit built to withstand the rigours of life at sea, and that should provide years of low-maintenance service.

A sailboat wind generator, also known as a marine wind turbine or wind charger, is a device for capturing wind energy and turning it into electricity.

Sailboat wind generators typically have 3 or more long, aerodynamic rotor blades attached to a central hub. The blades translate wind energy into rotational force and spin the hub, sometimes at near-supersonic speeds .

The hub is attached to an electrical generator – a lot like the alternator on an engine – that generates electricity as it spins.

A wind turbine is an electrical fan operating in reverse. The fan takes electricity and uses it to spin a motor, attached to a hub and some blades, creating wind.

A wind turbine takes wind energy and uses it to spin a hub attached to generator, creating electricity.

You can actually just spin any DC motor to generate electricity , but it helps a lot if you pick one that generates the flavour of electricity you’re after.

Brushed motors are appropriate for generating DC, whereas a brushless motor is better suited to AC voltage applications.

A handful of marine wind turbines, mostly older ones, do use a brushed motor set up to produce a voltage that can directly charge a 12 volt or 24-volt battery.

Brushed motors are called that because they literally have a core of metal brushes that drags along inside outer, magnetic stator. Those brushes wear out over time and need to be replaced. They’re in something like a starter motor that works intermittently, but putting them in wind generators was always a bad idea.

They’re also noisy – which is a major consideration in a device that is going to run overnight, above your head, while you sleep, every night.

Brushless motors have so many advantages over brushed, from their efficiency to their lifespan to their reduced mechanical noise. As such, most wind generators produce AC electricity and then rectify it to DC at the regulator in order to charge the battery bank.

This means you will normally have three wires leading from the wind generator on your sailboat to the charge controller. It also means you definitely don’t want to connect those wires, carrying AC electric, to your DC battery bank, without passing them through the charge controller first.

Wind generators offer a lot of advantages – notably the ability to work day and night, and in both sunny and stormy weather.

Solar panels are great, but they only work during the day – and on sunny days, at that. They’re also affected a lot by the seasons, because in winter there are both less hours of daylight, and the sun is lower in the sky, its rays have to travel further and they strike the panel at an oblique angle. And, it’s cloudy or rainy nearly every day.

Regardless of season, as we’ve explored earlier in this guide, some of the most popular sailing destinations don’t actually have reliable sunshine – but all of them have reliable wind.

Not so with sailboat wind turbines, which work just as well on sunny days as stormy. They often generate even more power in winter, on days when solar might be producing at 10% or less.

This effect makes wind generators a big enabling technology for grey-weather sailing, from extending your sailing on into the “shoulder season” and benefitting from empty bays and anchorages, to exploring unconventional cruising grounds such as the Scandinavian fjords.

Besides stormy and overcast days, wind generators will keep on producing at night. This is particularly helpful when night sailing with the radar, AIS and full nav suite running, maybe plus an autopilot, and then all your domestic loads like your fridge and freezer. Even if you’re just at anchor, it’s nice to wake up with topped-off batteries every morning.

This doesn’t apply if you have a modern boat with ample battery storage, but when we were just getting started in sailing, we would frequently have half-flat batteries by morning.

Not only does this shorten the life of the bank, it occasionally even meant we struggled to pick up the hook in the morning – which is a bit of a safety hazard. Again, this is mitigated by wind.

None of this is to say that you should ditch solar power for wind. Solar power has many wonderful properties, explored below, and the two technologies actually complement each other very well. If you have a large enough vessel, we fully recommend you try to integrate both into your power plan.

Wind and solar are both very useful technologies to the cruising sailor, each with its own set of advantages and disadvantages. Their pros and cons in fact offset each other and synergise quite nicely, compensating for each other’s weaknesses.

As such, we’d argue it’s less about deciding which is better, and more about figuring out whether you can incorporate both into your power plan somehow.

Nonetheless, let’s have a look at how solar power and wind generators compare and contrast, and some of the pros and cons of each technology.

Advantages of solar power vs wind power

Solar power’s major advantage over wind is that it’s “solid state”. This means it has no moving parts to wear out, and requires almost no maintenance.

In fact, solar panels will generally sit and faithfully do their thing decade after decade with almost zero human interaction. A common standard nowadays is for panels to retain 90% of their producing power after 20 years .  

There’s a 10kW solar array in Switzerland that’s been feeding directly into the grid since 1982; it’s over 40 years old and going strong.

Solar panels benefit from wiping down once or twice a year, but other than that, they’re a totally set-and-forget technology.

Many sailing destinations have ample sunshine, with long hours of direct sun throughout the sailing season.

Solar is also cheap and plentiful nowadays, and panels come in all shapes and sizes that can fit almost anywhere on a yacht – including a handful of solar panels you can walk on, although those are not cheap.

Overall, though, solar is much cheaper than wind watt-for-watt. You might pay $0.50 per watt for a good rigid polycrystalline solar panel and charge controller. A wind generator may well run to $2000 for 400w – that’s $5 per watt, up to ten times more expensive. And the wind generator has moving parts that can require replacement.

Another often overlooked advantage of solar panels is that their solid-state nature makes them very safe – there are no moving parts to catch a finger in, or spinning blades that could strike a member of the crew. They just sit and silently do their thing, year after year.

Disadvantages of solar power vs wind power

Solar only works when the sun shines. The sun, as we’ve pointed out earlier, doesn’t always shine. You might be surprised by how cloudy places like the Caribbean can be – some islands have rain up to 50% of the time.

Some popular sailing destinations, like the English Channel, average about two hours of sunshine per day, with rain or overcast skies on 75% of days annually ( no, seriously ).

There’s always night sailing, as well. If you’re night-sailing, you may well have tools like radar and AIS running for safety, plus other loads like an autopilot and anything like fridges and freezers running below.

If you only have solar power, and no wind, you may have to run the engine to make it through the night – or invest in a large battery bank that can keep up until morning.

Marine wind generators are an excellent way to bridge the gap. It can be windy at any time of the day or night, and very often the cloudy or stormy days are the windiest. It’s only sunny during the day, and only some days, so this is a major disadvantage of solar power when compared to wind.

Another disadvantage of solar panels is that they lose power quite dramatically when shaded, and sailboats unfortunately have a lot of tall, shade-casting objects. These include the mast, the boom, the sails and anything like radar or Starlink dishes .

Somewhat paradoxically, solar panels also lose power as they get hot in the sun, meaning the normal, everyday conditions in many exotic destinations can actually reduce their efficiency by double-digit percentages. They are happiest somewhere cold with lots of sun, like on top of a mountain – not in the tropics.

Advantages of wind power over solar power

The wind doesn’t rise and set like the sun – it can blow around the clock. Okay, technically, the sun rising and setting down does change the temperature and create all the wind on earth.

But the wind often continues after the sun goes down. In fact, when you’re on a boat, on the water next to land, the wind usually just reverses at night .  

It’s often windy on the water on sunny days because all wind is caused by pressure flowing from high to low, and the main source of those differing areas of pressure is heat from the sun – particularly, say, where the adjacent land and water heat up at different rates.

That’s how wind is made on sunny days. But it’s often windy on non-sunny days, too, because it’s just about air rushing between those areas of high and low pressure, hot and cold air. As such, cold fronts can bring wind too.

This makes wind somewhat more of an always-on technology than solar – especially in the places that sailing boats are found. There is usually wind offshore, and often in the anchorages too as it rolls off the hills . In some parts of the world, such as those affected by the Greek Meltemi , it blows straight 30’s weeks on end.

Overall, sailing boats are just usually found in places with abundant wind energy, so there’s a lot of synergy between sailing boats and wind generators. And we’ve pointed out, many exotic sailing destinations in the world have more wind than sun, and that’s before we get started on sailing somewhere like Scandinavia.

A wind generator has a small footprint compared to a solar panel, although it does need a large exclusion zone around it for safety. Wind generators are sometimes mounted up the mast, but we don’t generally advise putting a large, pendulum-like weight at the end of a 50-foot-long lever arm if you can avoid it as it may negatively impact the motion of your boat.

Disadvantages of wind vs solar power

Wind generators do have some drawbacks compared to solar. The obvious one is that they have moving parts, which both present a hazard to the crew and require replacement or regular maintenance.  

The worst-case scenario is a crewmember being struck by the blades. The tips of something like a Silentwind Pro can spin nearly a hundred times a second and get close to breaking the sound barrier.

Here’s an example of where someone accidentally clipped their arm on a sailboat wind generator and it both shattered their arm and sent the turbine blade flying across the cockpit. The author notes that they had also seen the wind generator explode a seagull prior to this incident.

Much of this is mitigated by putting the wind generator outboard and features like electronic brakes, so you don’t need to stop it with your right ulna as the gentleman above did. The upshot is that wind turbines are dangerous in a way that solar panels are not.

The constant motion also generates wear and tear. It used to be worse, back when we used brushed DC motors – but the bearings in brushless motors do eventually wear out too, and they benefit from regular greasing a bit like your winches. It’s just an extra thing to maintain.

It can be too windy for wind generators, too. It can’t be too sunny for solar panels (although it can be too hot). Many modern, top-end marine wind turbines have that electronic brake built in to compensate for this, but you still have to shut down and stop producing when it blows a gale.

Another disadvantage of wind is that it’s really expensive compared to solar on a watt-for-watt basis. Good polycrystalline panels paired with a brand-name MPPT controller might come to $0.50 a watt at the time of writing, while a leading wind generator works out at $5.00 per watt.

This is compounded by the fact that wind does often produce on quite a concave power curve. That is to say, you need a fair amount of wind to produce anything at all, and probably need gusts into the 30-knot range to start to see your rated wattage.

Another often-overlooked point is that if you’re sailing downwind, you are robbing the wind generator of air. If you are sailing downwind in 15kts of breeze, making 7kts, the apparent wind speed at the generator is only 8kts – which might not even be enough to start generating.

Finally, wind generators can be noisy. Again, brushless motors have helped with this significantly, but there is still the rushing of the air over the blades, and any eccentricity in the bearings or blades will send maddening, resonant tremors down the pole and directly into your sleeping quarters at all hours of the night.

The latest wind generators make use of things like acoustic decoupling, a fancy term for having a rubber dampener between the end of the pole and the deck, to mitigate this.

What is a dump load on a wind generator?

A dump load , also called a dummy load or diversion load, is something used in wind power to get rid of excess power when the batteries are fully charged.

One of the small downsides of a power source that runs night and day is the potential to oversupply electricity and overcharge the battery bank.

As an electrical generator supplies more and more power, it gets stiffer and stiffer to turn. The power has to come from somewhere, and it’s felt as resistance – producing a braking effect.

If you suddenly take that braking effect away by disconnecting the battery bank, the wind turbine will start spinning at very high speed, causing anything from rapid and excessive wear on the bearings through to a catastrophic failure where the blades shear off at supersonic speeds.

In order to prevent this from happening, the charge controller has the option to switch between charging the battery and supplying power to a dump load .

The dump load can simply be a big resistor. It will heat up as the wind generator spins on, and safely apply a brake to it by literally just wasting power as heat.

You can probably guess where this is going. Another option is to use an element specifically designed to heat up, and use it to heat water. You can easily buy DC immersion water heater elements for $20-30 , connect them in the place of the dump resistor and use them to make hot water with the excess power instead.   

We’ve often daydreamed about using it to make ice or run a teeny tiny aircon unit as well.

Some of the top-end sailboat wind generators will automatically apply an electronic brake and safely stop the blades when the bank is full, and it varies from model to model whether they simply have that as an option, or it replaces the dump load entirely (including useful ones, like making hot water).  

Do not be tempted to use the dump load to charge a second battery, such as a starter battery, when the first bank is full. If you do, you will encounter problems once the second battery is full and the turbine starts to freewheel.

If you do want to charge several banks at once, or one after the other, you want a split charger connected to the main charging output instead, and a highly resistive load that can run indefinitely on the dump load output.

Marine wind generators vs hydro generators  

Hydro generators are another way of capturing the energy of the wind and turning it into electricity. But instead of capturing the flow of air, a hydro generator is dragged through the water behind a boat under sail.  

The elephant in the room here is that a hydro generator is only going to work when the boat is in motion. A wind generator, on the other hand, keeps on producing while you swing around at anchor.

The average cruiser spends around 90% of their time either at anchor, on a mooring ball, on town quays, or in marinas. This is because the everyday business of cruising is not so much about sailing as it is about fixing the boat, going ashore for provisions or parts, waiting for a weather window, or exploring the place you sailed to, socialising with the other yachties you just met, barbecuing on the deck, and so forth.

The wind generator works through all of that, night and day; the hydro generator only a fraction.

So why does anyone use hydro generators at all, then?

The answer lies in the fact that a traditional trade-wind circumnavigation, by far the most popular way to “sail around the world”, is almost all downwind .

As a result, you are often “running away” from the wind when you sail around the world, which has the effect of subtracting your speed from the true wind speed and deducting that much power from your wind generator.

Thus, if you want to sail around the world on say, a performance catamaran, it might make sense to drag a generator behind the boat instead of in the air. That way, its performance is tied to your boat’s speed through the water rather than the apparent wind.

An adjacent use-case to this is people who “sail around the world” in the sense of not stopping, or stopping very little. Someone sailing non-stop downwind around the world, particularly on any kind of record attempt, would probably get a lot more of out of a hydro generator.

Another place hydro generators are seen is in the regenerative systems of systems like Oceanvolt . In these sophisticated systems, the propellors of the boat itself work as hydro generators by spinning and capturing energy as they’re dragged through the water under sail.

This feature is even starting to show up on electric outboards, such as the ePropulsion Navy series.

In summary, wind generators are the most practical choice for the average cruiser, multi-year circumnavigator or liveaboard sailor. Unless you love sailing so much that desperately want to go and tack around for four hours to charge your batteries – in which case, more power to you.

Wind generators can form an incredibly useful part of the renewable energy mix on board a sailboat.

While wind power on a sailboat works out many times more expensive than solar power, watt-for-watt, it makes up for this by generating power day and night – and often making even more power at times when solar falters, such as during storms.

Cruising sailboats that only have solar power will be forced to generate or motor if it’s cloudy for days on end, something that happens at least once or twice a month somewhere like the Caribbean.

Solar, naturally, doesn’t produce at night either, so if you have a lot of electrical loads running overnight your battery bank can take a beating.

A common example of where you might get caught out is night sailing with the autopilot, radar, AIS and instruments all running, in addition to your regular loads like the fridge.

Wind generators might usually be sized to produce less than a solar array because of cost, space and weight considerations, but they have the potential to run all day and night and in any kind of weather, and as such they often punch above their weight in terms of the overall energy generation picture.

Electrical loads might slow down a little overnight, as the crew sleep and lower temperatures mean fridges and freezers don’t work as hard, but it’s not uncommon for the overnight draw on a sailboat to be 8-10 amps or more. It adds up, by morning. 

Wind represents an excellent bridging technology for nights and extended cloudy spells, naturally producing the most when solar fails – such as during storms. 

A sailboat wind generator is most effective when paired with solar and a good lithium battery bank , allowing you to generate in all conditions. day and night; and to store and retrieve that energy efficiently even at high currents. 

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My Cruiser Life Magazine

Choosing a Wind Generator for a Sailboat – Complete GUIDE

Nothing denotes a salty off-the-grid ready yacht more than the sight of a wind generator mounted on the stern. Once, these were the main component of a sailor’s renewable energy arsenal. 

But today, as is the case with wind generators for RVs , the technology has fallen behind the fantastic strides that solar panels have made. Today’s solar panels are less expensive and more efficient than ever before, while wind generator technology hasn’t progressed much in the last 50 years.

Still, there are limited times when wind generators make the most sense on sailboats. Here’s a look at who could benefit from one and five of the best options on the market.

Table of Contents

Is a wind generator right for me, how much power do i need, alternatives to wind power, things to look for in a marine wind generator, 5 great marine wind generators.

Before you dive into the whirlwind of information out there about marine wind generators, take a step back for a reality check. Wind generators were the standard-bearer for years onboard sailboats, but in the 21st century, their usefulness has all but been replaced by solar panels. Solar is efficient, silent, and completely maintenance-free. 

As a result, the usefulness of a wind generator is now much more limited. There are many pros for wind generators—but most of them can be negated by one simple fact–the amount of usable power they produce is significantly less and more expensive than solar. 

Furthermore, the two times when a wind generator does make sense are not conditions typically encountered by most cruisers. Wind generators are only effective for significant power when the apparent wind speed on deck is more than 15 knots. That’s apparent wind speed on deck—meaning most downwind sailing in winds less than 22 knots true or so would be out. 

And then there are anchorages, where sailors hope that a wind generator will help them live off-the-grid to avoid a generator or engine recharge. How many anchorages have you recently sat in that had a constant 15 to 20 knots of undisturbed wind blowing through them? Most of the time, we’re trying to get out of conditions like that, not anchor in them. 

There are some parts of the world where these conditions are the norm. Caribbean trade winds and high latitude winds make wind generators more attractive. Those sailors stuck in the “horse latitudes” in between will find their wind generators silent and motionless most of the year. 

The other time that adding a wind generator makes sense is when there is simply no other renewable energy option available. A wind generator can mount in many ways on nearly any type of sailboat. It has a tiny footprint, unlike a large solar array. 

The bottom line is this—only add wind power when you have absolutely no space left for solar. If you’re maxed out on solar, a wind generator can give you a little boost. But another solar panel will consistently outperform a wind generator—unless you’re that rare sailor whose anchorages of choice feature steady and uninterrupted 20-25 knot winds.

Pros and Cons of Wind Power for Boats

• 24-hour per day operation (as long as it’s windy)
• Small installation footprint, compatible with most sailboats
• Good options when solar panels cannot be used due to mounting problems or shading (especially on ketches)
• Very low power generation in most conditions
• Ugly and bulky, mast and mount included
• Not effective when sailing downwind (like most tradewind sailing)
• Not effective in protected anchorages
• Maintenance intensive, moving parts and bearings wear out
• Limited controller options, many not compatible with LiFePO4 battery systems
• Expensive compared to solar

When calculating your requirements for off-the-grid living, the math does not lie. The problem is not lying when you do the math. You can find many calculators and spreadsheets online to help you make the basic calculations.

First, you need to know precisely how much power every electrical consumer on the boat will use and how long it will run each day. These items are often variable—refrigerators will have to run longer in hot climates and the summer, and lights will burn longer during the dark winter months. For everything that uses electricity, calculate the watts used per day (24-hour period).

Next, you’ll want to take into account how much power is being generated. It’s impossible to get accurate numbers for your setup until you’re out there doing it. In general, solar can be counted on for its maximum output for three or four hours a day. How many sunny days a year depends on your location. Again, there are many calculators online.

The wind is good for 24 hours a day, of course, but the wind is seldom that constant. So when calculating the math for a wind generator , it’s very easy to feel good about the choice. But practice has routinely shown that even a small solar array will outperform it in nearly every location.

As already mentioned, the number one choice for most sailboats for renewable power is solar. Solar panels are inexpensive and last for decades with zero maintenance. The downside is that they require a lot of shade-free space to work best.

For boats looking to make power during offshore passages, hydrogenerators are another solution. As long as the boat is cruising at six knots or more, the water passing by has enough potential energy to run electronics and charge batteries. The Watt & Sea Hydro generator is one of the best options out there, but there are also towable generators that do not require permanent installation. Some boats even have the option to use the free-spinning propulsion propeller to create electricity. Of course, these options only help charge the batteries when the boat is moving under sail, and only then at fast speeds. 

Power Output

The first thing to realize is that you must take manufacturer’s ratings for their units with a grain of salt. The numbers are engineering calculations for ideal conditions. That is to say, conditions that a marine wind generator will likely never get to experience. 

Of all of the performance numbers worth considering, perhaps the most interesting numbers are those at the low end on the scale – when does the unit start producing power, and how much. Most of us boat in places with 15 knots of wind or less most of the time, so this is the range your wind generator will sit in for most of its serviceable life.

Noise Level

First and foremost – do not be fooled by online reviews. Every wind generator on the market produces noise. Since the noise is generated from multiple sources, it can be hard to compare apples to apples when shopping for a generator. 

Blade design has a significant effect on noise – some blades are simply noisier than others. Not only does the blade’s aerodynamics make noise, but they can also cause vibrations. All wind generators will require occasional rebalancing and adjustment to minimize vibrations from the blades. 

The moving parts inside the generator can also cause noise. Most are mounted with standard ball bearings that can and do go bad. Many manufacturers advertise these as maintenance-free, but that’s simply unrealistic in the marine environment.

Finally, the mount on the boat is a significant source of noise because it transmits the blade’s vibrations, no matter how minor, into the boat’s structure. Proper mounts have rubber dampening pads built-in, but even still, some noise will get through. This can sound like a buzz, hum, or even a thumping noise.

Quality of construction plays a huge part in how much noise a wind generator makes. As a result, you get what you pay for with wind generators. Unfortunately, the inexpensive hardware store models built for residential use are typically the noisiest. 

You can compare the noise output of various wind generators by taking a stroll around the marina docks or a dinghy ride around the anchorage. Bad or poorly-maintained wind generators can be heard from many boat lengths distance. On the other hand, a high-quality unit will be difficult to hear when you’re standing under it, much less on another vessel.

Correct Voltage

Wind generators should be matched to your primary battery bank—the one that you’ll be charging. Most boats will be 12 volts, and a few will be 24. 48-volt systems are becoming more popular on electric yachts and those using the battery bank for big consumers like air conditioning. These are the exceptions to the rule, however. 

Charge Controller Functions

Unlike solar, wind generators are typically matched to the charge controller that the manufacturer packages with the unit. There are simply a lot more factors that go into regulating a wind generator, including the generation technology it uses and how it brakes or diverts its load. 

Charge controllers are either PWM (pulse width modulation) or MPPT (maximum power point tracking). PWM is a less expensive technology, while MPPT controllers are more expensive. In the world of wind generators, which one a controller features is a bit of a toss-up. Some manufacturers swear by MPPT, while others say there is no benefit to the added cost. 

Most solar chargers accept a solar input, usually only about 100 watts, though. It’s probably more efficient to run your solar array on its own MPPT charge controller. But if you’re only planning on installing a small array and don’t want the hassle of programming separate charge controllers, having the option with your wind controller is a very nice feature. 

Finally, the programmability of the charge controller is a significant factor. Very few of the older PWM charge controllers allow you to input charging profiles. Again, this is less of a problem with wind power than with solar. But if you’re planning to use less forgiving battery chemistries like lithium, you’ll want as much control as you can get from your controller. 

Brake and Automatic Cut-Off

Being able to cut a wind generator off in an over-power or over-speed scenario is extremely important. All wind generators come with some form of braking system. The brake needs to be used when the system reaches a full charge, or the wind speed goes beyond the wind generator’s limits. 

Remember that the generator’s not simply limited by what the blades and bearings can handle. There is also the strength of its mounts to consider. For example, a 60-knot gust on a free-spinning generator will impose an unbelievable force on its mounts.

Then there are wiring considerations. The wind generator is only designed to output so much power, and during your installation, you must use wire sized for the maximum output. What happens if more than that amount of current goes through wires due to a brake failure? Heat and possible battery damage will result, but hopefully, the circuit breaker or fuse will cut it off before then. 

Some have aerodynamic brakes that turn the generator as wind speed increases. This theoretically means that it can never go over its designed limits.

Others feature a brake that is automatically or manually activated. It’s designed to come on when the current reaches a maximum, such as during powerful wind gusts. It also breaks the unit to a stop when the batteries are fully charged. 

An alternative plan is to have a diversionary load. Some wind generators will come with dump loads, which are nothing more than ceramic heating elements. When the wind generator produces too much power, power is redirected from the batteries into these heating elements. They’re also used when the generator produces too much power for the system during storms. 

Mounting and Unit Weight

The mounting mast used to secure the wind generator is sometimes more complicated than the wind generator itself. It must be strong and stayed from all angles. Stainless tubes with two supports are commonly used to mount them to the back of yachts. 

The construction and position of the wind generator are essential to reduce vibrations and noise within the boat. Don’t mount a wind generator over someone’s bunk! All proper mounts have sound-deadening materials like rubber grommets built in to make them as quiet as possible.

The blades of a wind generator must be positioned so that they can’t catch any lines, canvas, or flags from other parts of the boat. This makes stern-rail mounting almost impossible on ketches and yawls. On these boats, mizzen mast mounts are often the best alternative. 

Keep in mind as well that the spinning blades of a wind turbine are like spinning knives. Sailors have lost fingers trying to secure wind generators during storms. Therefore, they should be mounted high enough that it is impossible to accidentally come in contact with the blades during normal operations. 

As mentioned before, another critical component of the mounting is calculating the correct wire size. This is calculated from the unit’s maximum output, the round-trip length of the wire run, and the unit’s charge voltage.

Finally, the positioning of the wind generator should supply it with uninterrupted airflow. If the wind is blocked, even slightly, but a mast, sail pack, or hardtop, the wind generator’s efficiency will be negatively affected. These items could also induce turbulence into the air being supplied to the turbine, which could result in vibrations and noisy operation.

When shopping around for wind generators , notice that power output is not one of our main criteria. This might seem odd, but all of the wind generators on this list produce more or less the same amount of power in a given wind. Some start producing at lower speeds, and some keep producing at high speeds, but in general, these occurrences are so minor and so rare that they don’t calculate into the shopping process.

Eclectic Energy D400

The D400 has a legendary reputation among cruising sailors as the wind generator of choice. It is nearly silent to the point of being very difficult to hear. It is built by Eclectic Energy in the UK, and you can spot its distinctive shape and five-blade design on yachts worldwide. 

For all the pluses, there are some detractors from the D400. For one, it is pretty much the most expensive option. It is also the heaviest—it requires a much beefier mount than other options do. 

SilentWind Pro

The SilentWind has a few advantages over many other wind generators. For one thing, the included MPPT charge controller features Bluetooth programming via a smartphone or tablet. In addition, you can set many parameters for the charge profile—meaning that it is one of the few wind generators that are at least somewhat compatible with the next generation of lithium marine battery systems. 

Compared to the D400, the SilentWind has a more lightweight and compact body. It’s a three-blade design that features blue composite fiber blades. The SilentWind is made in Portugal. 

Rutland 1200

Rutland is the wind power branch of the Marlec renewable power company from the UK. Rutland makes a wind range of wind generators for yachts of all sizes. The 1200 is a three-blade generator that features an MPPT controller with a solar input. At 10 knots of wind, it produces about 40 watts of power. 

Primus Air Silent X

Primus makes a variety of wind generators from their facility in Colorado. The “top-of-the-line,” so to speak, is the Air Silent X. It’s an upgraded version of their Air X that comes supplied with quieter blades made of distinctive blue carbon fiber.

Superwind 350

The German-made Superwind has a unique overspeed and overcharge protection system—the units feature feathering blades. This is undeniably more complex than many other options on the market. These generators are designed to be installed in grueling conditions where a damaged generator cannot be repaired quickly. Their primary market is aimed at remote telecommunication equipment stations and offshore sailors.

Matt has been boating around Florida for over 25 years in everything from small powerboats to large cruising catamarans. He currently lives aboard a 38-foot Cabo Rico sailboat with his wife Lucy and adventure dog Chelsea. Together, they cruise between winters in The Bahamas and summers in the Chesapeake Bay.

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Best Wind Generators for Sailboats of 2024

Sailing gives us freedom: we don’t need a motor or fuel to travel the oceans. That freedom isn’t absolute. Most sailors still rely on electricity for lighting, refrigeration, small appliances, and to run the electronics that we rely on for navigation and safety. That means we need batteries, and if we rely on batteries, we have to charge the batteries. Since we’re already using the wind to move us from place to place, it makes sense to use that same energy source to keep our batteries charged up and ready for action. Wind generators are increasingly becoming a standard feature on cruising sailboats, and a wide range of products have emerged to meet the demand. This review of the best wind generators for sailboats will help you select the product that best meets your needs.

For more of our top sailing gear recommendations, check out the Best Solar Panels for Sailboats .

Quick Answer - The Best Wind Generators for Sailboats

• AutoMaxx DB-400 View at Amazon
• Primus Wind Power Air-X Marine View at Amazon
• Nature Power 2000W View at Amazon
• Missouri General Freedom II View at Amazon
• Nature Power 400W View at Amazon

Comparison Table - Best Wind Generator for Sailboats

Reviews - The Best Sailboat Wind Generator

Automaxx db-400.

• Optimal Power AT : 28 MPH
• Rated Output : 400 Watts
• Voltage : 12V
• Minimum Wind Speed : 6.7 MPH
• Maximum Wind Speed : 112 MPH
• Blade Diameter : 48”
• Automatic Braking Controls Your Speed In High Wind
• Built-In Charge Controller And Overcharge Protection
• Maximum Power Point Tracking Gets The Most Power From Any Wind

BEST BUDGET WIND GENERATOR

If you want to try out wind power without spending a fortune and you’re looking for a basic, versatile device suitable for use on land or water, the Automaxx DB-400 is what you need. The durable polypropylene and fiberglass construction of this affordable wind generator resists corrosion and all parts are protected from both water and UV radiation. 

Some reviewers complain that these units fail to spin at the advertised cut-in speed and generated less power than expected, but many others reported performance consistent with expectations. It’s difficult to say whether these deficiencies are caused by installation issues, inconsistent products, or excessive expectations. It’s always good to test your unit on arrival and assure that it’s doing what it needs to do! 

As with all units listed here, you’ll need a mounting pole for this generator, but other than that it’s ready to install: the charge controller is built-in and you can wire it to your battery pack and forget about it!

Primus Wind Power Air-X Marine

• Weight : 13 lb.
• Voltage : Adjustable Output
• Minimum Wind Speed : 8 MPH
• Maximum Wind Speed : 110 MPH
• Blade Diameter : 46"
• Easy Installation: Wire Directly To Battery Bank
• Auto-Brake Regulator Slows Blades When Battery Is Charged
• Built-In Charge Controller
• Marine-Specific Design And Materials

BEST OVERALL SMALL WIND GENERATOR

The Air-X Marine is the Rolls-Royce of small wind turbines. It’s made entirely in Colorado, and the relatively high price is reflected in the features and overall quality of the unit. It costs three times as much as an entry-level unit with the same output rating, but you get what you pay for.

The unit squeezes its mechanical and electrical components into a tiny ultralight package that is ideal for higher mounts and requires much less effort to secure than heavier bulkier units. You get a sophisticated built-in charge controller with external indicators to tell you when you are charging and when your batteries are full, and the unit is fully use-ready. Just wire it to your battery bank and you’re ready to charge.

This unit is one of the most popular sailing wind generators on the market for good reasons. It’s quiet, efficient, and gets the job done with no extra effort and very little maintenance.

Nature Power 2000W

• Weight : 38 lb.
• Optimal Power AT : 45 MPH
• Rated Output : 2000 Watts
• Voltage : 24V
• Blade Diameter : 70”
• External Controller With LCD Output Display
• Industrial-Strength Aluminum Body With Marine-Grade Coating Means This Generator Will Last Your For Years To Come
• Electromagnetic Brake System For Overcharge Control
• Low-Noise Carbon Fiber Blades

BEST OVERALL LARGE WIND GENERATOR

This is the big boy: a full-on 2000 watt marine wind turbine, ready to install and power up some serious juice to feed those hungry batteries. The unit is designed to be effectively maintenance-free, with a coated cast aluminum body and carbon fiber blades engineered for quiet operation. There’s an external charge controller with an LCD output display to let you know what you’re generating and what your charge status is. Electromagnetic braking prevents potential damage from high winds and overcharging.

You’ll need 45 knots of wind to generate the full 2000 watts, but even at lower speeds, you’ll be putting out enough power to keep your batteries topped up. Paired with a solar array, this wind generator will give you all you need for complete energy independence!

Missouri General Freedom II

• Weight : 59 lb.
• Blades : 11
• Optimal Power AT : Not Specified
• Voltage : 12/24V
• Minimum Wind Speed : 6 MPH
• Maximum Wind Speed : 125 MPH
• Blade Diameter : 62.5"
• Rust-Proof Galvanized Components With Zinc-Plated Hub Make This Wind Generator Almost Indestructible
• 28-Magnet Generator For Maximum Power
• Aerodynamically Tapered Carbon Fiber Blades

BEST POWER-TO-PRICE RATIO 

If you’re looking to step up to a higher-output wind system without spending a fortune, Missouri General delivers with the Freedom II. This unit adopts a radically different design philosophy, featuring 11 carbon fiber blades to get maximum power out of wind in the lower end of the charging range. The Freedom II uses a permanent-magnet generator and several other unique design features to achieve high efficiency and durability.

This unit is quite inexpensive on a price-for-power scale, but it does not arrive installation-ready and you’ll have to add a charge controller, a dump load to protect your battery from overcharging, and cables. You’ll probably also need to have an electrician install the unit to assure that those components are correctly connected and working as they should!

Nature Power 400W

• Optimal Power AT : 27 MPH
• Minimum Wind Speed : 7 MPH
• Marine Grade Coating And Sealing For Durability
• Low-Noise Carbon Composite Blades
• Smart Charge Controller For Maximum Output

BEST LIGHTWEIGHT BUDGET WIND GENERATOR

Nature Power turbines are designed specifically for marine use and offer a durable, corrosion-resistant cast aluminum body and whisper-quiet carbon fiber blades. There’s a specialized electromagnetic braking system designed to keep the unit within its electrical and mechanical limits without the wear and tear associated with mechanical braking and a smart controller that adjusts the voltage-to-current ratio for peak charging efficiency. The low weight of the unit makes it ideal for mast installations or other high mounts. As with any relatively low-output wind generator, you can’t expect to rely on this unit for all of your charging needs. It’s very well suited to use in conjunction with solar panels: on hot, still days the sun does the work, and when the weather turns sour or you’re out at sea, the wind will kick in with its share. This is an excellent choice for the wind component of a combined solar/wind generation system.

THINGS TO CONSIDER WHEN BUYING A WIND GENERATOR

It’s important to recognize that while wind power is useful, it isn’t magic. Most modern wind generators will begin generating power in quite light winds, but the output may be minimal and you’ll need sustained higher winds to deliver the charge you want.

If you’re moving downwind, you may get less charge than you expect: if the wind is at 20 knots and your downwind speed is 8 knots, your wind generator will be effectively receiving 12 knots, not 20! Many sailors find that a wind generator combined with a solar array is the most effective power solution, and some add a towed generator that generates power when dragged through the water as an additional option. The power mix that best suits you is something you’ll have to decide, but there’s a good chance that wind will be part of it!

Read through these things to consider to get a better sense of how to choose which wind generator is right for you so that you can get back on the water and enjoy the wind in your hair without worrying about losing electricity unexpectedly!

MANAGE YOUR EXPECTATIONS

A common complaint about wind generators is that they don’t deliver as much power as expected. This is more often a problem of simple physics than an issue with defective units or improper installation. The power delivered by wind increases with the cube of the wind speed, meaning that (keeping things very simple), a 20-knot wind delivers 8 times the power of a 10-knot wind. If you expect a unit that’s rated to deliver 400 watts of power at 28 knots of speed to deliver 200 watts at 14 knots, you will be disappointed, and it won’t be the unit’s fault!

While most units will cut in (start working) at 6 to 7 knots, don’t expect to generate measurable power until you reach 10-12 knots. Remember that if you’re on a downwind heading the apparent wind – the wind speed actually experienced by your generator – will be wind velocity minus hull speed. And remember that most anchorages were chosen because they are protected from the wind.

All in all, you are likely to find yourself generating less power than you expected. That doesn’t mean the installation is useless: it will contribute, it will charge your batteries while you sail, and if used in conjunction with solar panels, it can meet your charging needs. It’s a useful tool, not a magic bullet!

INSTALLATION

Your choice of generator will be affected by your installation options. Some sailors opt for masthead or mizzenmast installations, which can receive up to 50% more wind than lower placements but which are less accessible for maintenance and involve longer cable runs with more resistance. If you’re looking at such an installation, you’ll want a lightweight, low-maintenance unit. Most sailors prefer installation above the cockpit or transom, high enough to keep blades away from people and equipment but low enough for easy access and relatively short cable runs.

WATCH OUT FOR HIGH WINDS

Manufacturers claim very high maximum wind tolerances, but these are often based on wind-tunnel tests using controlled wind from a single direction. Turbulence can increase the burden on the device, and if you’re expecting wind in excess of 50 knots, taking down the generator is a wise precaution.

THE NOISE FACTOR

Noise and vibration were once huge problems with wind generators, with users reporting everything from a repetitive whump to a screaming howl. Modern construction and improved blade design have made turbines much quieter, but noise and vibration can still be issues. It’s great to generate power while you sleep, but not so great to have your generator keeping you awake! You may wish to check out some working installations to get a sense of how much noise is involved.

If you’re wondering whether to go with wind or solar, All At Sea and eMarine have useful articles weighing in on that eternal debate. For more information on Wind Generators, try these articles from Yacht Unlimited and Sail .

FEATURES EXPLAINED

About those numbers.

Rated Output is the maximum number of watts a unit can put out under ideal conditions. These numbers are based on wind tunnel tests and are rarely if ever achieved in the field.

Minimum (or “cut-in”) Wind Speed is the wind speed required to turn the blades. Very little power will be produced at this level.

Maximum Power is achieved at a specific target wind speed. Most units are designed to begin braking or “cutting out” power at speeds above this level.

Blade Diameter is the end-to-end distance between blade tips. You’ll need to consider this distance when mounting the unit to keep the blades well clear of any obstructions.

Voltage is the unit’s output voltage, which needs to match the voltage of your battery array.

Maximum Wind Speed is the highest wind the unit can survive. This may be substantially reduced by turbulence!

SOME COMMON FEATURES

Charge Controllers are devices that regulate the output of your generator to maximize the charging of your battery. Some units have built-in controllers with different levels of sophistication, and others do not.

Braking may be mechanical or electromagnetic and is used to assure that the unit’s rotation will not exceed its mechanical or electrical limits. Electromagnetic braking is claimed by some to produce less wear and tear.

Tracking Systems keep the blades facing the wind and keep the unit from spinning on its mount axis, which will twist the cable and damage the installation.

Blades may be fiberglass or carbon fiber, with more expensive units usually using carbon fiber. Many blades are designed to flex and shed wind if wind velocity exceeds design limits.

Corrosion Resistance is achieved by using a variety of coatings and materials. Marine environments place an aggressive burden on materials and both exterior materials and sealing are very important to keep units working.

A Dump Load is a device that diverts excess power to resistors that radiate it as heat, protecting batteries from overcharging.

For more of our top sailing gear recommendations, check out these popular buyer's guides:

Sailboat Anchors

Sailboat Winches

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Solar Panels for Sailboats

Bilge Pumps

Yachting Monthly

• Digital edition

Best Solar panels for off-grid power and keeping batteries charged

• Phil Sampson
• November 28, 2022

We take a look at 6 of the best solar panels for boats, from folding units to cutting-edge flexible panels

Free power forever? If only it was that simple! Photo: Graham Snook

For many in the boating community, solar panels represent something of a holy grail. They are, after all, the gift that keeps on giving, aren’t they? Free power forever, (or many years anyway), coupled with zero running costs – what could possibly be better than that?

All you have to do to make this dream come true is banish the memory of the purchase price from your mind – something boaters are notoriously adept at doing – and wait for the sun to shine. If only it were that simple…

The fact of the matter is that there are costs associated with solar panels beyond the price of the panels themselves. While some types of panels can be simply laid on the deck, in many cases some form of mount will be required.

Then there’s the wiring to hook them up to your battery, plus any fitment and/or cosmetic work needed to hide the cabling from view. If your panels are to be left connected permanently, you’ll require a regulator too.

This will prevent both overcharging and a reverse flow of power out of the battery after dark. If you do not fit a regulator, a blocking diode can be used to halt the reverse flow instead.

But once all of the above have been overcome – and providing you’ve done your homework to ensure your panels will generate sufficient power to cover your needs – then, yes, it’s a power free for all!

There are many other benefits to boat solar panels too: First and foremost, they work all on their own – solar panels are automatic, so you can just let them get on with the job.

Apart from the occasional wipe over and a wiring check, they’re largely maintenance-free too. Unlike wind generators, (especially like the one with wonky bearings on that boat moored next to you), they don’t make any noise.

And finally, your batteries will be pleased, because keeping them from going flat can extend their life.

Here’s our choice of the best boat solar panels.

6 of the best boat solar panels available right now

Giosolar 1,000W flexible solar panel

Best flexible boat solar panel

Delivering a mighty kilowatt of power, (not far off the amount used by a one bedroom house), this Giostar package comprises ten separate 100W panels, each of which is 1,050 x 540 x 2.5mm in size.

Capable of charging either 12 or 24V batteries, a kit of this magnitude is one for the most serious of solar enthusiasts – Eco Experts reckons 660-990W is sufficient for a liveaboard.

Giostar panels are abrasion resistant, anti-rust and dust proof and their junction boxes are sealed and waterproof. The panels are also light, thin and flexible, and can withstand being bent up to 30 degrees.

Reasons to buy: Incredible amount of power, panels are abrasion resistant as well as anti rust + dust proof

Reasons to avoid: Premium price

Price: £1,464.45

Buy it now on Amazon (UK)

Note: We may earn a commission when you buy through links on our site, at no extra cost to you. This doesn’t affect our editorial independence.

Ecoflow 160w portable solar panel.

Mobisolar 100W foldable solar panel

Best foldable boat solar panel

Mobisolar’s foldable panels are light (4.5kg) and measure 121 x 56.5 x 3 cm when unfolded, with the longest dimension reducing to 60 cm when folded, making them easy to transport.

The panels use advanced technology to provide superior performance, with each panel subjected to a thorough testing routine before and after assembly.

So confident is Mobisolar in its products that the company stands behind its panels with a two-year defect warranty and a five years’ electrical performance warranty.

For maximum flexibility in operation, three USB power outputs are fitted per panel, one delivering 100W, the second 60W and the third 10W.

Reasons to buy: Foldable, lightweight and long warranty

Reasons to avoid: Not resistant to the elements, doesn’t feature mounting holes

Price: £145.00

Buy it now on eBay

Eco-worthy 100W solar panel kit

With 100W panels being ideal for keeping batteries topped up, our second offering in this power class is from Eco-worthy, a major player in the solar panel field.

Competitively priced, our link below is for a kit which includes an LCD control unit and four ‘Z’ brackets in addition to the panel itself.

The Eco-worthy 100W panel is of the monocrystalline type, which means their cells are made from an ingot grown from a single silicon crystal of high purity. It’s also a rigid panel, so this particular product would need to be mounted on a frame or flat surface.

Reasons to buy: Competitively priced, Features LCD panel, brackets

Reasons to avoid: Only a year warranty, not resistant to elements

Price: £113.99

PV Logic 20W Flexi solar panel

Offered by Force 4 Chandlery, this lightweight semi-flexible solar panel comes complete with a dual battery solar charge controller.

The panel is completely waterproof thanks to its six-layer, heavy-duty laminate finish, and should a wayward crew member plod over it in their size 9s the panel’s dimpled top surface is ‘self healing’.

The controller can handle both 12 and 24V systems and the panel’s PWM (Pulse Width Modulation) charging system is efficient and battery-lifetime friendly.

Supplied with LED battery-status indicators and 4 metres of cable, PV Logic Flexi panels can be bonded to flat or curved surfaces.

Reasons to buy: Lightweight, waterproof, dual controller

Reasons to avoid: Lacks mounting options

Price: £149.95

Buy it now on Force 4 Chandlery

Powoxi 10W solar panel

At the budget end of the market comes this Powoxi 10W solar panel charger kit. While you won’t go far on just 10W of power, this kit claims to be capable of charging and maintaining various 12V batteries.

The kit features a fully automatic charging and maintenance controller, which provides intelligent three-level charging and protection against short- and open-circuits, under voltage and overloading.

A reverse flow system is included and the interface is described as ‘plug and play’. While the panel is rainproof, it will not withstand immersion in water, so this is a product to perhaps leave behind on the dock when you take to the water.

Reasons to buy: Great budget option, plug and play

Reasons to avoid: Not waterproof, won’t go far on 10V

Price: £27.59

Eco-worthy 10W/5W solar panel

The least pricey option we could find anywhere, this baby 5W solar panel is simply a trickle charger. But if that’s all you need then look no further, for this is another Eco-worthy product.

The technology in the panel is polycrystalline, so it’s not the most efficient on the market, but for this power that’s hardly a great concern.

The panel is supplied with two charging options; a pair of crocodile clips which attach directly to the battery, and a cigarette lighter plug.

According to the product’s eBay listing, this seller alone has sold approaching 3,000 of these units – and at this price, we can understand why!

Reasons to buy: Incredible price, can be charged via car lighter plug

Reasons to avoid: Small, not very efficient

Price: £9.99

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MarineKinetix MK4+ Marine Wind Generator

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Product Description

The marine industry’s highest rated wind generator.

MarineKinetix MK4+Wind Generator, including Controller - For Lead Acid, AGM, Gel and Lithium Batteries. 

The marine wind generator with a 100% satisfaction guarantee, and the industry's best 3-year limited warranty.   

Double click on the large picture above to scroll through scores of pictures of fellow bluewater cruisers worldwide relying on power from their MarineKinetix wind generator.  See a recent blog from a seasoned bluewater cruiser and Salty Dawg Rally organizer who solved his large energy demands using a combination green energy, including an MK4+ wind generator  here .

The MarineKinetix Wind Turbine has become one of the most popular marine wind generators available due to its advanced technology, superior output, and  super-quiet design.  The MarineKinetix is now considered to be the benchmark among serious cruisers. With a 30% to 50% larger swept area than the most popular marine wind generators, it is simply capable of intercepting more of the available windstream, and capturing more power.  Its sophisticated charge controller displays all the data, including Amps, Watts and Volts, and assures that the power makes it safely and efficiently into your battery bank through a 2-stage smart charging process. No need to buy extra meters , rectifiers, stop switches, or load diverters.  These are integrated into our smart controller. Just add your mounting pole and the wiring to your batteries, and you are ready to start producing green energy.

We are celebrating our 12th year of serial production, and our 8th year producing our latest design, the MK4+ Marine Wind Generator. The MK4+ replaced the popular MarineKinetix MK450.   

The MK4+ includes the following upgrades:

• The Wind Generator body is smaller and even lighter than the original design.  This is accomplished with a shorter, but more upright tail, with a greater surface area, and lower polar moment, for faster, and truer wind-tracking.  This lowers yaw error and improves performance in shifting winds.
• Upgraded asymmetrical pole-shifted rotor with 12 (vs 10) neodymium rare-earth magnets for more power and zero cogging.  Bread-loaf magnet design for optimum air gap.
• Upgraded 36-slot stator with premium heavy-gauge copper windings.
• A new and improved anti-corrosion marine grade finish, which starts with a new high-pressure die-cast magnalium body, which is GEOMET  zinc-nanocoat pre-treated, then top-coated with a high-quality corrosion-resistant thermoset marine powder coating. No other marine wind generator uses this anti-corrosion process
• New double yaw bearings.  Double bearings provide a larger "wheelbase" for the yaw joint, which reduces any free play, which can contribute to vibration and noise.
• Improved silicone o-rings which are totally weather-proof.
• Improved Aero'coustic 20% carbon-fiber filled injection molded blades, which are 18% more rigid than the previous design.
• All new Hybrid Wind/Solar Charge Controller with LCD display - with integrated battery monitor, stop switch, ammeter and watt meter. (no need for expensive monitoring panels).
• Patented 2-Stage PWM Charge Controller - Increases the efficiency of the charge cycle and tops up the batteries quicker and more fully.
• Improved high-precision hub, with tighter blade fastening tolerances, for perfect blade alignment and whisper-quiet operation.
• Improved molded urethane isolator pad, which fits between the pole and the collar.  Molded in "cap" allows it to stay put during assembly.

The great performance of the original MK450 remains.  The above changes are incremental improvements designed to improve start-up speed, ease assembly, resist corrosion, and improve real-world output. The MK4+ is truly a world-class micro wind generator.

Tired of talking to non-technical vendors that don't understand the nuts-and-bolts of what they are selling?  Give our technical rep, Jeff, a call directly at (864) 275-7837 to answer any questions. Read on to see what really matters when considering wind power for your boat.

Why Consider the MarineKinetix Wind System?

The MarineKinetix Wind Turbine System is simply one of the best performing small wind generator system available for marine use. That is quite a boast, considering all the small turbines out there with catchy names, and bigger advertising budgets, but read on to find out why we believe you'll soon agree.  

The MarineKinetix MK4+ is a simple to install, hands-off, super-quiet wind-energy production system made especially for the marine environment. This high-output, low start-up-speed system utilizes the best of European wind-science in its design. In addition to its leading-edge high-output dual-bearing 3-phase permanent magnet generator, it also features world-class aerodynamic efficiency with its carbon-filled aero'coustic rotor blades, which have been optimized for high torque, low rotational inertia, and exceptionally quiet output. These features, coupled with the included "hands-off" microprocessor-based charge-controller, and its exceptionally low yaw-error, make for what we think is the best marine wind generator system on the market. See why below.

The MarineKinetix MK4+ wind turbine system is a leap forward in wind turbine science. It makes the intelligent compromise between low-speed start-up and high-speed output, all at a realistic and cost-effective price.

• A complete 400 Watt Wind System (includes generator and controller)
• 1330mm Blade Diameter (1.3M) - Swept Area = 1.39 Meter
• Weighs only 17 lbs., about HALF the weight of certain competitive designs, without compromising performance thanks to a magnalium body, an asymmetrical rotor, and high-energy-density Nd2Fe14B rare-earth magnets 
• Lightweight 300g 20% Carbon Fiber Polymer Composite blades
• Available in 12V, 24V and 48V designs
• Compatible with VRLA, Gel, AGM, Lithium, and Lithium Iron Phosphate (LiFePO4)
• Industry Standard Mounting - Mounts to 1.5" Schedule 40 pipe (1,9"OD), or 48-50mm OD tubing
• Double marine thermoset powder-coat finish, over a DACROMET self-healing aluminum-zinc nano coat
• 5.8 knot start-up speed (begins producing power), 6.7 knot cut-in speed (begins charging 12V/24V batteries)
• Aero'coustic 20% Carbon Polymer Blades
• Super-silent - LAeq 35dB at 5M at 10 knots (about the same as a running fridge)
• Direct drive, 3-Phase dual-bearing AC permanent magnet synchronous generator
• Neodymium Iron Boron (Nd2Fe14B) permanent magnet synchronous design
• 12 pole rotor, with bread-loaf magnet profile, and asymmetrical pole-shifted magnet placement, for low cogging torque
• Automatic back-EMF braking at full charge (or 40 knots overspeed protection)
• IU PWM Charge Control Profile with hysteresis braking
• Microprocessor controlled auto set-point for AGM, Gel, VRLA, Flooded,  Lithium, and Lithium Iron Phosphate (LiFePO4)
• Requires no diode packs, diverters or external resistive loads
• Over-charge, over-current, and automatic over-speed protection
• Integrated heavy-duty yaw-axis slip-ring, allowing continued >360° limitless rotation
• Simple installation, and user-serviceable components
• Includes micro-processor charge controller with "at-a-glance" LCD charge, voltage, amperage and wattage status
• Fully compatible with existing solar installations (no conflict with other existing charging sources)
• 3-year limited warranty, and 30-day 100% satisfaction guarantee
• Full lifetime tech support by phone or email with purchase

What is included in the Wind Generator kit?

• MK4+ Wind Generator
• Smart Charge Controller with integrated performance monitor and stop switch
• Blades (x3) with SS blade mounting hardware
• Hub, with mounting nut 
• Snap-on molded plastic nose cone
• SS Hardware to mount clamping collar to your pole
• Silicone rubber isolator (goes between pole and collar)
• Assembly allen key tools
• Instructions

What accessories are available from Marinebeam?

• 50A Resettable Circuit Breaker
• Pole Mounting Hardware Kit
• 3-Piece Pole Mast 
• 10/3 Marine Cable
• Spare Parts

What is the wired Remote Stop Switch Connector option?

While the controller already has an integrated stop switch --accessed with the front panel buttons-- some customers who will have limited access to the controller location may wish to mount a secondary  stop switch in a more accesible locaton. So, this option includes a two-pin connector, which attaches to a port on the bottom of the controller, and allows you to run your small-gauge wiring to your  on/off toggle switch. The switch and extra wiring are not included, but this is a very low voltage and low current control signal, so a light gauge wire (18-22 AWG) is sufficient.  For more sophisticated systems (like off-site telemetry systems) a relay can be used to remotely actuate the brake.

Details About the Unique Marine Kinetix Technology:

Our solution is a systems-approach to wind-energy production on-board. The MK4+ system couples several forward-thinking ideas into one "wind-system" which is easy to install, affordable, and maximizes energy production.  We did this by first starting with a low-friction, high-energy-density 3-phase rare-earth magnet rotor design, which came from concepts and materials used in leading-edge green-energy vehicle research. The Neodymium Iron Boron (Nd2Fe14B) permanent magnet rotor uses patented technology licensed from Sumitomo/Hitachi in Japan.  This is the same type of PM rotor design used in the AC synchronous motors in the Chevy Volt and other electric vehicles.   The rare-earth magnetic rotor is a key to its performance and low noise and vibration.  We now utilize an asymmetrical pole-shifted rotor design, which is a advanced method that replaces the heavy mass and cost of older skewed rotor designs, while providing the same advantage of reducing the cogging torque, and improving low speed performance.  We coupled this super-efficient machine with a biomimicry-inspired carbon-fiber-filled blade set, which makes for super-quiet performance while improving overall aerodynamic power.

The results are a turbine that outperforms others in start-up speed, output, and noise.  While other systems are idle, the MK4+ is generating. While other systems are disturbing the peace, the MK4+ is virtually silent. While other systems are struggling to charge, the MK4+ is topping off.

What are the important factors in wind energy production?

Physics dictates the basic performance of all wind generators.  In fact, the power available to any wind generator is a function of the square of the diameter (swept area of the blades) and the cube of the wind speed.  The ability of any specific wind generator to the capture wind efficiently depends on the length of its blades (its swept area) and its Tip Speed Ratio.   Tip Speed Ratio refers to the speed of the tips relative to the speed of the wind.  If the blades spin too fast relative to the wind, they begin to begin to look like a solid disk to the wind, and air piling up in front of the blades effectively blocks the wind behind it.  On the other hand, if the blades spin too slowly, much of the wind passes through the gaps between the blades, and the energy is lost forever.  So, swept area and blade design are the most important areas which the wind generator manufacturer can control.  While the MK4+'s blades are only 8 to 9 inches longer than the typical blade, they sweep as much as 40% more area than the competition.   With a nearly perfect tip speed ratio due to the computer-modeled and simulated blade design, and the impedance load-source matching of the controller, the MK4+ has a higher energy capture compared to most other designs. 

Because of the cube relationship of wind speed to power production, wind speed is absolutely the most important factor in wind energy .  There is no getting around the physics of that.  There is 27 times more power in a 15 knot wind than a 5 knot wind.  The key takeaway here is that regardless of the technology, you need good wind to get good performance from a wind generator .

What affects the ability to maximize output power capture shown above?

Wind generator power is dependent on wind speed, battery acceptance rate, and applied load , so a variable load and a discharged battery was used to characterize the absolute capture power for the data above.  As the wind increases, your wind generator will already be charging full-time, and the battery bank's acceptance-rate, in amps, will decrease as the battery charges and its voltage increases.  So, it is important to understand that by the time the wind is blowing 20 knots or more it is likely your batteries will not be capable of accepting the full amount of amps that any generator can provide.  This is good.  It means that your batteries are reaching a full state-of-charge, and that you have the headroom in power to cover any other loads as they arrive, without further discharging your batteries.  At the end of the day, it is best to think of a wind generator as a free-energy variable power source, whose output changes day-to-day depending on the available wind and the presence (or absence) of downstream electrical loads that it requires to generate power.

Read the following pages to learn about the MK4+, and view the video below to see how it performs against a much more expensive wind generator at very low wind speeds.

Our Integrated "Wind-System": Many popular marine wind generators are essentially sold in kit form, with the user left to decide what method of control they need to get the power into their batteries effectively.  Alternatively, some turbines have an included charging set-up, but offer what is essentially a simple automotive voltage regulator and a load diverter.  This can be a real problem for those wanting to optimize charging and protect their expensive batteries.  It is not enough to just generate efficient and effective power at the generator head. It is just as important to get that power effectively into our battery bank, and to regulate that power based on the battery's specific demands for voltage and current throughout its charging cycle.  By use of an IU charging profile, the system not only can be more efficient, but can also significantly prolong the life of the batteries by preventing overcharging.  Typical load diverter type controllers can only charge your battery to about 80% State-of-Charge (SOC).  This partial cycling is particularly bad for your batteries. Combining the Low Start-Up Speed "Tortoise Approach" with the High-Power "Hare Approach": Having seen both real-world performance in various anchorages around the world, as well as published performance testing over the years, we realized that the best approach out there on the "real water" was to apply leading-edge technology to each component of the system to find an intelligent compromise between the Tortoise Approach and the Hare Approach to wind energy production. A small wind-system that is capable of making power in low wind speeds can take advantage of a long day with low wind speeds by putting small amounts of power into the battery consistently throughout the day and night (the Tortoise Approach). On the other hand, a larger system can take advantage of big gusts or heavy wind by making tons of power very quickly (the Hare Approach).  The perfect solution for us cruisers would be a two-stage turbine that could be the Tortoise in low wind speeds, or protected anchorages, and could be the Hare in a high-velocity wind environment.   By leveraging leading-edge technologies to make incremental efficiency improvements in each of the discrete components of the wind system, we achieved a "sum of the parts" that meets our goals for an ideal marine wind system in-board.   We believe it is the best marine wind generator on the market for those sailors wanting a high-quality, hands-off, high-output, and super-quiet system.  Our real world data and feedback from our customers backs up that claim.  Read on to see how we did it. The Blade Set: We have found that the practical key to consistent production on-board is to start with a large 1.39 meter swept area, and then to apply leading-edge technology to the blade set to extract the maximum amount of energy.  Swept area is the most critical aspect of energy capture, and the bigger the swept area, the more power, period.  Blade length defines the swept area (Area= π r 2 ), and typically the longer the blades, the stronger and heavier they must be to withstand the exponential increase in torque.  The MK4+ solves this issue by using a unique 20% carbon fiber molded blade that is not only long and rigid, but extremely light as well (<300g).   This allows us to produce a blade that is up to 9" longer than the competition, but it weighs much less, and sweeps up to 40% more area. 

We also focused on the airfoils to get a super-efficient, super-quiet, Aero'coustic blade that gives exceptional power while maintaining low-speed start-up capability.  This way the turbine can take advantage of all-day energy production, but also can generate more serious power when the winds pick up.  It doesn't do much good to have great potential generating capacity if the blades never turn in the real world.  Compare our start-up and output to the competition, and you will see the distinct advantage. Details of the Design: The blade and tail design focuses on several key strategies:

• Low Start-up Speeds
• Very Low Rotational Inertia
• Very Low Noise at Optimum Tip Speeds
• Very Low Yaw Error
• Optimized Tip-Speed Ratio (the ratio of the speed of the tips to the speed of the wind)

While our carbon-fiber reinforced blade set has an extremely low rotational inertia, a strong and lightweight blade is only part of the story.  The starting torque on a wind turbine is generated in the blade area closest to the hub, while the power producing torque is produced in the blade area closer to the tips.  By use of German-engineered computer modeling and simulation, a variable blade profile was produced that can react quickly in low wind speeds, yet produce high torque and optimal tip-speed ratios at high speeds.  The blades are produced in a solid-model-patterned single-cavity injection-molding tool, so that each blade is identical in weight and profile.  Using a 20% carbon-fiber filled polymer makes the blade very light, durable, and repeatable. Lightweight blades have a low rotational inertia, which is critical in wind-energy production in the real world. Low rotational inertia allows the blades to accelerate more quickly, which means they can spin faster in lower wind speeds, therefore keeping the tip-speed-ratio (the speed of the tips vs. the speed of the wind) more constant.  Operating closer to the optimum tip-speed-ratio during gusts also allows the turbine to improve energy capture from these sudden gusts as well. Another way to increase aerodynamic efficiency --and to reduce noise on an airfoil blade-- is to manipulate and control the lateral airflow over the foil.  Of course, some of the best engineering solutions often come from mimicking what is already found in nature. Whales and certain fish have amazing hydrodynamic efficiency and stealth through the use of tubercles , or raised and slotted sections on the leading edges of their fins.  Our blades likewise use biomimicry-inspired riblets along the leading edge of the blades, which help the airfoil to create more power at lower speeds, and to operate more efficiently in turbulent air streams.   These Aero'coustic riblets, also prevent the air from traveling down the blade edge and "vortexing" off the blade tip contributing to tip noise. The noise you hear from most wind turbines is the sound of wasted energy. How quiet is it... really ? The MK4+ is extremely quiet, and we have never heard one quieter.  In fact, it measures only 35dB at 5 meters in 10 knots of wind.   At 15 knots, just a flutter, but no tip noise.  As the wind builds the flutter noise will increase.  Above 30 knots, everything exposed to the wind at that velocity will generate some noise, including the MK4+.  To get an idea of how quiet it really is, just watch the video below.  Note that the video was shot with a CMOS rolling-shutter camera, so the blades appear to be turning slowly, while in actual fact they are turning at several hundred RPM.  Video compliments of customer Hayden Cochran on his Island Packet "Island Spirit":

What is Yaw Error, and why is it so important?

This is quite different from most of the other, and more expensive, 400W generators.  The typical marine wind generator charge controller uses 50 year-old technology, which is simply a load-diverter switch, which, upon reaching a set-point, diverts 100% of the energy to a set of resistive elements (essentially heater coils).   So, when the battery reaches its dumpload set-point it isn't actually fully-charged, and this type of Partial State of Charge (PSOC) cycling damages the battery by reducing its capacity, and sulfating the battery plates.  They can't fully-charge the battery because they have no way to dump only the excess power produced, while continuing to top up the battery.  They can only dump all of it. The best scenario would be to have a way to progressively dump power so that the batteries could be fed with only the power that they need at this final stage of the charging process.   

 The controller is very compact (5-5/8" H x 5-7/8" W x 3-1/4" D), fanless, and is designed to be bulkhead mounted.  

It has the following additional features:

(1) Full monitoring capability (Volts, Watts, Amps), no additional battery monitors, shunts, panels, or displays needed (2) Backlit LCD display with clear graphical readout (3) Manual Brake deployment via keypad, so no additional stop switch is required (4) Battery charge level indicator (5) External load control (for managing lighting, etc)

Unlike some other popular marine wind generators which have internal controllers, there are no on-board electronics in the hot and salty elements, and there is no need for additional rectifiers, heat sinks, stop-switches, large resistive loads, or ammeters.  It all happens automatically and safely within the charge controller. It even protects from over-charging and under-charging. It is truly a hands-off charging solution.

Maintenance and Warranty: The MK4+ is designed to provide years of trouble-free service out in the elements, and has a 3-year warranty against defects in materials or workmanship.  We specified a simple and rugged mechanical set that uses very few parts, is easy to maintain, and will stand up to the rigors of the marine environment.  Unlike most single bearing automotive alternator-based designs, our dual low-friction rotor is supported by two low-friction bearings to provide long-life and easy start-up.  The unit is easy to disassemble, understand, and maintain.  The body is made of a lightweight magnesium and aluminum alloy, which is pre-treated with a zinc-aluminum nano-coat, and then a double marine-grade  epoxy powdercoat to resist oxidation and corrosion.   The MK4+ is bluewater tested by full-time cruisers, and like all of the Marinebeam products it is backed by the best technical support and warranty in the business.  Be sure to look at the various customer installation picture above to see some of our installations around the globe.

Interesting Links

Click here for our Frequently Asked Questions (FAQs) document.

Link to download PDF copy of installation manual  (V2.2)

Link to download PDF copy of controller manual  (V2.1)

Should you have further questions, feel free to contact us by phone or email.  Jeff, our resident MK4+ technician can be reached M-F 9-6PM at (864) 275-7837.  Or you can reach him by email at [email protected]

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Great unit with great service.

Posted by Jean on 5th Sep 2024

I had this wind generator running for the past 6 years at the top of my mizzen mast on my sailboat as good and reliable as the first day i put it up there. Sitting at the top of the mizzen mast i needed to install a unit with low maintenance as i can’t easily climb up to the top. Summer, winter this thing is running non stop for the past 6 years without a single issue and performance is very good. I use to have the Air Breeze which i don’ miss at all. If you are looking for a great unit at a great price don’t hesitate you will be very pleased with this wind generator. And as an added bonus you will get outstanding customer services.

Quiet, but needs > 15 knots wind....

Posted by John on 16th Aug 2024

Nice, quiet wind generator but needs at least 15 knots before it produces useful output. This is not a criticism as pretty much all wind generators need this much wind to be useful. The "Very low startup speed" sounds great but in reality all that's happening is that the blades are turning at low wind speeds - there's no power coming from it ? Below that all it does it light the small LED under the body ? The controller is better than some but does not offer "MPPT" charging for the solar input. It's origin is in controlling street lights and that shows in the menus that offer not so useful options to control lights. The only other problem is that either the controller or the generator are electrically noisy. The electrical noise manifests itself as a harsh buzz (on SSB/HF radios) that charges according to wind speed. It can be removed by putting the electrical brake on but then, of course, it produces no power at all! All in all it doesn't make the difference I was hoping for unless you get > 15 knots apparent wind. Plus points are that it is quieter than most, is a very good price and seems well engineered.

MarineKinetix MK4 Wind Generator - Highly recommended!

Posted by David Pollock on 28th Jan 2024

I’ve had my MarineKinetix MK4 Wind Generator for over 10 years and it has performed flawlessly! It is an exceptional product! Produces great power and is super quiet. While I also have solar, in the winter down in the Keys or further south, the daylight hours are reduced. But there is usually a 10+ knot wind. Nothing like waking up in the morning with the batteries fully charged. And quiet - I have had guests on my boat in a mooring field comment on the noise of wind generators on other boats. The MK4 is whisper-quiet, built solid with quality materials and they provide great service! Highly recommended!

Posted by Bob Golembicki on 12th Jun 2023

I replaced our very old two bladed Four Wind mizzen mounted generator this past winter with an MK4+ and are very happy with the output and how quiet and well balanced the new generator is as we’ve been sailing around the Chesapeake Bay this year. We’re running the engine to charge only on very calm days and maybe half as much as we had to with our old generator.

Recommended

sku: WR-10-3G

Round profile 10/3 marine tinned cable.

sku: CB-50A-42

50 amp manual reset circuit breaker.

sku: MK4-MOUNT

Marine wind generator mounting pole hardware kit.

sku: BL-MK-4+

Replacement blade for marinekinetix mk450 or mk4+ wind generator.

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Sailing into Sustainability: Wind Generators vs. Solar Power for Sailboats

Automaxx Windmill | July 1, 2024

Introduction

In the world of sailing, the call for sustainable and eco-friendly energy solutions has become increasingly loud. Sailboat enthusiasts seeking to reduce their environmental footprint often find themselves at the crossroads of choosing between wind generators and solar power . In this article, we'll weigh the pros and cons of each option to help sailors navigate the waters of renewable energy for their beloved vessels.

Harnessing the Elements: Wind Generators on Sailboats

Consistent Power Production : Wind generators can be highly effective in generating power consistently, especially when sailing in open waters where winds are reliable.

Compact Design : Many wind generators are designed to be compact and can be easily installed on the mast or stern without occupying valuable deck space.

Less Dependent on Sunlight : Unlike solar panels , wind generators can produce energy during overcast days or at night, providing a more consistent power supply.

Noise and Vibration : Some wind generators may produce noise and vibration, which can be a concern for sailors seeking a quieter and more comfortable experience.

Aesthetic Considerations : The appearance of a wind generator on the mast or stern may be a factor for sailors who prioritize the aesthetics of their vessels.

Harvesting Sunbeams: Solar Power for Sailboats

Silent Operation : Solar panels operate silently, ensuring a peaceful and undisturbed sailing experience.

Low Maintenance : Solar panels generally require minimal maintenance, with no moving parts that can wear out over time.

Versatility in Installation : Solar panels can be installed on various surfaces, including the deck, cabin top, or even integrated into flexible and semi-flexible panels that conform to the boat's shape.

Dependent on Sunlight : Solar panels rely on sunlight, making them less effective during cloudy days or at night.

Space Considerations : Depending on the boat's size and configuration, finding sufficient space for solar panels may be a challenge.

Making the Right Choice: Considerations for Sailors

Energy Requirements

Consider your boat's energy needs and cruising patterns. A combination of both wind generators and solar panels might provide a balanced solution, ensuring power generation under various conditions.

Sailing Environment

Assess the typical weather conditions and wind patterns in the areas where you sail. A region with consistent winds may make a wind generator a more attractive option, while sunny climates might favor solar power.

Aesthetic Preferences

Consider the visual impact on your sailboat. Some sailors prioritize a sleek and unobtrusive appearance, favoring solar panels, while others value the functionality of wind generators.

Budget and Installation

Evaluate the initial cost, installation requirements, and potential maintenance of both wind generators and solar panels. Factor in the ease of installation and the impact on your sailing experience.

The choice between wind generators and solar power for sailboats ultimately depends on your unique sailing lifestyle, preferences, and environmental conditions. Both options offer distinct advantages, and many sailors find that a combination of wind and solar provides the most reliable and sustainable power solution. As technology advances and options evolve, sailing enthusiasts can look forward to an even greener future on the open seas, powered by the forces of nature. At Automaxx, we have energy solutions for all of your needs. Ready to introduce renewable energy to your sailboat? Come check out our marine wind turbine   and solar panels  today!

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How to Install a Wind Generator on a Sailboat

The marine wind generator is, without a doubt, one of the most effective ways of charging your boat's batteries while you are away from the electricity grid. One of the most important things to take into account when selecting a marine wind generator for your boat is the installation process.

As a sailor, you'll most definitely rely on electricity in running various parts of your boat. In addition to the power needed to run the electronics that are of great importance for navigation and safety, electricity is essential for lighting, refrigeration, and running other appliances. But because you always sail deep in the water where there's no electricity, you need another source of power that we can use to charge the boat's batteries while we are out there on the water. This is where the wind comes in handy. You're already using wind to propel your sailboat, so it makes sense to use the very same wind to charge your boat's batteries and ensure that every part of your boat runs smoothly and meets your sailing needs.

Marine wind generators are more and more becoming a standard feature on sailboats. They are a great source of renewable energy and one of the most important things is to learn how to install a wind generator on a sailboat. Installing a wind generator on a sailboat is a process that must start with an assessment of the sailboat's power needs. Knowing the amount of power that your boat will consume in 24 hours will at least give you a rough idea of the size of the battery bank you require and how many amps your charging devices should produce.

You should also know where and how to install the wind generator's system. This will, of course, directly affect how well the wind generator's turbine converts the wind power into electrical energy. You should also ensure that the amount of battery storage available on your sailboat, as well as the controls available, is efficient in ensuring that the generated power doesn't go to waste.

In this article, we'll take a comprehensive look at how to install a wind generator on a sailboat and everything else you need to ensure that your wind generator works properly and efficiently.

Table of contents

The Importance of Using a Wind Generator on a Sailboat

Even though wind generators may not be of much help off the wind, they are increasingly becoming more appealing to sailors looking for an alternative source or extra power for their sailboats. The fact that they rely on the same wind that you use to move from one point to the other makes them quite a hit. Additionally, today's marine wind generators have undergone continuous improvement over the last few decades and are now well proven and quite reliable. This is exactly why wind generators are still common in sailing despite the advent of solar panels and hydro generators.

A wind generator will keep your boat's batteries charged at all times as long as there's wind. It doesn't matter whether you're at the port or out on the water, the wind generator will continuously pump out power even on cloudy days. That's not all; wind generators are cost-effective since they're maintenance-free and do not need any launch or recovery. More importantly, there are very powerful wind generator units that can produce more than 400 units of power, which is just enough to keep a fairly medium sailboat running and operating for 24 hours.

But just like with anything that has advantages, there must be some disadvantages. One of the most noticeable downsides of relying on a wind generator is that the power produced by the generator can significantly reduce if there's no wind. Most wind generators can manage to produce about 200 watts of power in wind speeds of 20 knots but things can even become worse when you're anchored at the port since winds are generally very low at the ports. As such, you may need an additional source of power such as solar panels, especially if your sailboat has heavy power requirements.

Installing a Wind Generator on a Sailboat

Installing a wind generator on your boat's charge system is a serious process that requires careful planning and attention. As we noted earlier, this process should start by first assessing your boat's power needs. You should be able to determine the amount of power that your boat and its appliances need to consume in at least 24 hours. This will certainly give you a clue of what you require.

The general idea is to ensure that you don't have to keep your boat's engine running so as to keep your batteries charged because this might not be enough in running your boat's appliances. In most cases, a boat's power needs are modest. Well, the boat generally needs power for lighting, running the navigation and safety equipment, refrigeration, and powering a stereo, if any.

The Equipment Required

One of the most important pieces of equipment required when installing a wind generator on your sailboat is the turbine. Generally speaking, the turbine should be functional at both medium and high wind speeds. You have to, however, keep in mind that even the biggest wind generator won't produce much power if the wind speed is below 8 knots. The turbine should be tough, reliable, and quiet. You certainly do not want a turbine that sounds like an approaching helicopter as this can be so annoying.

Given that early models are very noisy, three-bladed rotors are becoming more and more popular. They are smartly designed with CAD blades that significantly reduce the whistling and thrumming sounds that occur at the tips of the blades. These modern rotors are also designed to be more efficient and reduce friction through the use of permanent magnet alternators that allow speeds of the blades to be reduced, thereby reducing the noise levels considerably.

With that in mind, some of the best wind generators to go for include Air breeze, Eclectic Energy, Leading Edge, Rutland, Silentwind, and Superwind.

The Aerodynamics of Turbine Blades

Ensuring that power moves from the turbine's alternator and safely into your batteries may seem like a simple process. There are, however, aerodynamics involved and it only makes sense if you understand how they work.

In terms of the blades, they operate based on a similar principle or a plane's wing. There may be some differences but they are generally designed to produce optimum output. This means that the turbine blades should not go too fast as it can mitigate the wind generator's efficiency. The same applies if it is too slow. In essence, it works like a car gear so having very high or low gear can be inefficient. The idea here is that the airflow will become unstable if the blades are at very high speeds.

The best way to solve this problem is to rely on the "tip speed ratio". This technically describes whether or not the blade tips are moving faster than the actual wind speed. As such, the blade tips should be moving at 320 knots on 20-knot wind speed but there should also be the survival speed, which is just the right wind speed that is needed to produce the right amount of power to sustain your sailing needs.

The Amount of Power that Your Boat Needs

It's of great importance to budget for the amount of power to ensure that every facet of your sailboat is functioning properly. Of course, there are obvious appliances such as plotters, interior lights, and fridges. There are also navigation lights, engine monitors, entertainment systems, pumps, watermakers , gas alarms, electric winches, hydraulics, and many other things. You should also make a good margin that will have you covered if there's an emergency.

You should also consider other things such as air conditioning (though this may need fuel) as well as the type of sailing you're planning to do. Will you be sailing upwind or downwind? Well, such minute factors can significantly affect the amount of power that your boat needs. It is, therefore, crucial to determine a clear and accurate idea of how much power you need to generate to perfectly operate every part of your boat.

Mounting the Wind Generator

One of the most challenging things that revolve around how to install a wind generator on a sailboat is where to mount it. Location is very fundamental and can either positively or negatively affect how your wind generator operates.

The golden rule that governs the position of the wind generator is quite straightforward. It should be mounted in an area of the vessel where there will be no interruption of the flow of air or wind to the turbine from all directions. Generally, the wind generator is mounted on the boat's mast with two stays. You can easily raise or lower the wind generator if it is installed with a pivoting base. But if it is installed on a fixed mast, it can cause difficulty if you want to secure the wind generator when there's an impending storm.

And because the main aim is to optimize the output from a wind generator, there are a few important things to do. The most important thing is to ensure that it is very stable. This is because even a slight rolling or pitching might just be enough to rotate it away from the wind. The wind generator also requires clean air from all directions and as much as possible.

As you can see, these two principles seem to be at loggerheads given that you'll get more wind speed as you go higher but this may affect the stability of the turbines. With this in mind, mounting the wind generator on mizzen masts can be a good option but choosing to mount the turbine just above the cockpit is an even better option. The idea here is that it will be a lot easier to manually control the turbine if all other options of braking it doesn't work. Again, installing and maintaining the turbine overhead the cockpit is a lot easier than when it is mounted on the mizzen masts.

That's not all; mounting the turbine over the cockpit also means that the cables need to transport power from the turbine to the alternator are much shorter. This means that the wire diameter will be a lot smaller without necessarily affecting the voltage. The fact that the voltage can drop if the wind generator is mounted up higher on the masts should be particularly important.

This is because it can affect the overall performance of the wind generator and the power it produces and this means that the power supplied to your sailboat might just fall short. Again, a considerable amount of weight can be reduced if the turbine is mounted just over the cockpit. The cables will be reduced and the overall stability of the wind generator will be increased if it is installed overhead the cockpit.

Of course, you'll also have to install the electrics that come with the wind generator unit. For example, there's the controller that is used in regulating the power supply from the turbine, as well as the dump load resistor that is essential in absorbing any excessive current that may be produced when the batteries are fully charged. There's also an inline stop switch, which is essential in turning off the unit when it's not in use. Well, most of these installations are straightforward and are generally shown in the unit's installation guide.

Assembling the turbine should also be a walk in the park. Units do come with fasteners and are accompanied by installation instructions that are easy to understand and follow, thereby making the installation and assembling process a breeze.

So if you've decided to install the wind generator overhead the cockpit, which is our best location, you must find a perfectly sized pipe and mount it solidly at any corner of the stern. You have to ensure that you support the pole with at least some diagonal tubes so that it doesn't swivel. And if you are planning for an off voyage escapade, using the hose clamps to secure the main pole might not be the wise thing to do. This is because they'll most likely snap and twist as a result of constant vibration and miles of hard sailing.

Securing Your Boat's Wind Generator

With that in mind, you should also be prudent enough to secure the wind generator if there's a pending storm. As a sailor, you should be prudent, stay alert, and prepared in case there's a storm. The most important thing is to know the dynamic of the wind generator and how to apply electric brakes or even have the turbines lowered when there is a storm.

You can do this if the wind speeds are more than 15mph. This is of great importance in ensuring that the wind generator does not overheat or the blades do not break. You can also choose to remove the wind generator altogether and store it in a safe place.

All in all, the importance of having a wind generator on your sailboat as an alternative energy source can never be downplayed. This is a great source of renewable energy that will have your boat working perfectly well even if you are sailing in some of the remotest corners of the world. Just know how to install the wind generator, have it maintained, and protected when there's a pending storm and you'll be good to go.

Until next time, happy Sailing!

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Daniel Wade

I've personally had thousands of questions about sailing and sailboats over the years. As I learn and experience sailing, and the community, I share the answers that work and make sense to me, here on Life of Sailing.

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> > Please support our sponsors and let them know you heard about their products on Cruisers Forums. 24-03-2019, 16:18   Boat: Catalina 250 all summer with the 250 on this inland lake near Montreal. So no real access to direct the hydro plant generated electricity. Looking for both and generators, it seems that prices are dropping much this spring in . My needs is mainly to be able to keep on charge optimally two 50 A/h (I only have one now) and to have some light at the top of the at night. In addition, being able to use the starter on my 9.9 , and feeding a 40 li Mobicool cooler would be great. I would like my batterie to be fully charge every second day. I have seen a Morphon turbine 400W DC 12 V with a 20A Hybrid Charge Controller for 220$ CAD. On the 100 W mono-crystal panel are available at 120$ CAD from Seacans. I thought that two of them with a charge controller would do the job. Given my type of needs would you say that either solution would fit my needs? Comments and and advices would be appreciated. Thanks. 24-03-2019, 17:19   Boat: FP Belize Maestro 43 and OPBs I suspect that you will get very little energy from wind in the Montreal area in summer. (about 10km/h average, 16km/h max winds in Jun-Aug.) You will probably find that the cut-in speed of your is close to 10km/h and even at 16km/h output will be minimal. If it were me, I'd invest it all in . If you can't get your fully charged every day, how do you expect to get them fully charged "every second day" ? 24-03-2019, 17:51   for more AND a sell the becasuse you will never have a solution . 24-03-2019, 18:05   Boat: none from a rafted to mine on a . The lesson I learned was: I would prefer to chew off my arm than have to listen to a wind all the time! 24-03-2019, 18:07   Boat: Endeavourcat Sailcat 44 light and a bit more, but not a Mobicooler. They are thermoelectric and are notoriously inefficient. I did not see their technical specs on their web site, but they are probably quite capable of drawing your batteries down to zero over night. The problem with solar is cloudy days and shadows. You probably don't have room for more than 2 or 3 on 25 ft boat and one or more of them is likely to have a shadow over it at least part of the day which will really hurt your production. 24-03-2019, 18:20   Boat: FP Belize Maestro 43 and OPBs at night. In addition, being able to use the starter on my 9.9 , and feeding a 40 li Mobicool cooler would be great. I would like my batterie to be fully charge every second day. ... On the solar panels 100 W mono-crystal panel are available at 120$ CAD from Seacans. I thought that two of them with a charge controller would do the job. 24-03-2019, 19:03   Boat: Catalina 250 the batteries every second day, the sun or the wind will be going on these two days lap. But maybe this should not be written that way in Shakespeare`s tongue. Where did you get your data about Montreal? I get from 8 to 10 knots between may and september, that is 4.12 to 5.14 m/sec. On the lac des Deux montagnes, west of Montreal, the wind conditions might be a little different than in town. But maybe you know better. Thanks for your . 24-03-2019, 19:38   24-03-2019, 19:55   Boat: FP Belize Maestro 43 and OPBs I get from 8 to 10 knots between may and september, that is 4.12 to 5.14 m/sec. On the lac des Deux montagnes, west of Montreal, the wind conditions might be a little different than in town. But maybe you know better. Thanks for your . 24-03-2019, 19:59   Boat: Outremer 45/pdq36 (Toronto) which is not where you are I understand but here wind is of zero use for keeping the batteries up. I had ( i have more now) 150 watts feeding 210 amphere bank running a novakool frigde unit . Never a problem Slam it wit as much solar as makes sense to fit . With the of wind generation solar is much cheaper and more reliable. It does produce a bit on cloudy days 24-03-2019, 20:22   Boat: Catalina 250 fully charged should take more time. 2) I do not mind adding panels or using both wind generator and solar panels. 3) I have been in St-Martin and S-Barthelemy for a week sailboat intermediate course. Ours was well fixed or installed, with not so much vibrations. It seems that the make of the generator, the pole and the could make a difference: The limitation would be more in terms of our Montreal area available winds. 4) Sentinel at night , could there be low consuming bulbs? 5) Thanks for the tip on the Peltier system, I did not knew that is was less efficient than conventional . What formula did you used to calculate the power consumption of the Peltier system? In addition, I might need the cooler only for outings, as I will not live on the boat. So lets says not more than five hours. Does the device consume less energy for only, and not freezing? Cooling would be enough for me. 24-03-2019, 20:27   Boat: Beneteau first 26 Use 2 pumps one for fresh one for Have the lights open most of the time Have a mast light And I can run my in normal conditions , in hard conditions the batteries will get to 50% after 5 to 7 days with auto pilot running hard and cloudy (it happened only once ) I now have total 200 watt and batteries are full every day even with running the controller is at float . I did had a wind generator it was silent but the dump load resistor was noisy so I have it . I do t have a fridge . Ps : I tried cooled peltier , and was very inefficient. If you have the to buy one (around 450 complete kit ) I think 200 watt solar will be able to run a compressor . 24-03-2019, 21:25   Boat: crowther trimaran 33 24-03-2019, 23:03   Boat: Volkscruiser 913 wind generator on our 32 foot yacht. The wind generator does not produce much power but on more than one occasion I have gone to and woken in the morning to fully charged batteries. A wind generator does not take up much room and its always good to have more than one source of power. Cheers 24-03-2019, 23:07   Boat: FP Belize Maestro 43 and OPBs What formula did you used to calculate the power consumption of the Peltier system? In addition, I might need the cooler only for outings, as I will not live on the boat. So lets says not more than five hours. Does the device consume less energy for cooling only, and not freezing? Cooling would be enough for me. , , , , , Thread Tools Rate This Thread : Posting Rules post new threads post replies post attachments edit your posts is are code is are are are Similar Threads Thread Thread Starter Forum Replies Last Post Sweet As Electrical: Batteries, Generators & Solar 120 16-09-2010 18:27 Eddie Electrical: Batteries, Generators & Solar 17 30-03-2010 19:06 nancynana Electrical: Batteries, Generators & Solar 15 26-02-2008 05:17 Da BigBamboo Electrical: Batteries, Generators & Solar 38 15-10-2007 12:21 - - - - - - - Privacy Guaranteed - your email is never shared with anyone, opt out any time. Click here - to use the wp menu builder How to Convert Watt Hours (Wh) To Milliampere Hours (Mah) For Batteries 6 Best Solar Generators in 2024 Reviewed 4 Best Solar Generators For House Boats in 2024 Reviewed 4 Best Backup Power Sources for Security Systems in 2024 How to Choose a Quiet RV Generator for a Peaceful Camping Experience How Long Can Food Stay in the Fridge Without Power? The Ultimate RV Checklist: X Essentials for a Smooth and Enjoyable Trip RV Outdoor Storage Solutions: How to Maximize Space and Efficiency The Step-by-Step Guide to Installing an Outdoor Electrical Outlet How to Prep for Emergencies in the City 15 Essential Items to Keep in Your Car for Emergencies Everything You Need to Know About Prepaid Electricity Plans What is a Microgrid? What Is a Solar Farm? What Are Thin Film Solar Panels? What Is a Semiconductor? Table of contents 3 Best Marine Solar Generators for Boats  What To Look For When Buying Solar Generators For Boats  Sign Up for Emails And unlock a delightful surprise! I agree to EcoFlow's Privacy Policy and Terms of Service. 3 Best Solar Generators for Boats in 2024 Reviewed Few things can be more thrilling and life-affirming than slicing through the open water while on a boat. Hair billowing in the wind, the spray lashing your face—it’s a feeling of unbridled freedom and adventure.  While solar generators are increasingly common for small-home living, camping, and RVs, their use on boats has been quietly growing for years. With the next generation of solar generators on the market, there’s never been a better time to fit a generator to your vessel and enjoy the clean, renewable energy and silence they provide.  Here is our choice of the best solar generators for boats in 2024.   3 Best Marine Solar Generators for Boats   Eco flow ecoflow delta max + 400w solar panel . The Eco Flow EcoFlow DELTA Max with a 400W solar panel is a robust solar generator perfect for boat use. Not too big but still provides ample energy, you can use the EcoFlow DELTA Max in conjunction with various solar panels. Using a single 400-watt solar panel, it has a 2kWh capacity that you can push as high as 6kWh with EcoFlow DELTA Max smart extra batteries. It also comes with a voltage range from 11-100V and a solar connector, which means you can connect additional panels to the EcoFlow DELTA Max.  If cloud cover becomes a problem, Eco Flow’s maximum power point tracking (MPPT) algorithm can detect voltage and current in real-time, allowing for optimal solar generation throughout the day. In just 65 minutes, the EcoFlow DELTA Max can charge up from 0-80%, meaning you don’t need to wait hours for it to charge. Adding AC charging and the EcoFlow Smart Generator can boost your capacity to 3400W—you’ll struggle to find anything comparable anywhere else. The EcoFlow DELTA Max also comes with an IP68 waterproof rating. Its many monocrystalline silicon cells have ETFE film coating, protecting panels against water, debris, and dirt.   Portable enough to carry easily but with enough power to supply a decent-sized boat with energy, the EcoFlow DELTA Max has emerged as a strong choice if you’re looking for a marine solar generator.  Eco Flow EcoFlow DELTA Pro + 400W Solar Panel When you need to go big, no other option compares to the EcoFlow DELTA Pro . This solar-generating monster comes bundled with a 400-watt solar panel. It boasts a 3.6kWh capacity, which you can expand to 25kWh.  If you’re looking for the industry-leading solar generator, look no further. Nothing on the market compares to the EcoFlow DELTA Pro’s AC output, which is easily robust enough to power heavy-duty appliances such as refrigerators and hair dryers.  It also has one of the fastest charge times, with speeds of 3400W. It can fully charge using solar power in 2.8-5.6 hours. If you charge it from an AC wall outlet, you’ll be done and dusted in just 1.8 hours. It’s a speed almost unheard of when it comes to portable solar generators.  The EcoFlow DELTA Pro comes with a brand-new LFP battery with 6500 cycles, so you can keep powering your boat for years without worrying about switching out the battery.  For the ultimate in solar power solutions for your boat, the EcoFlow DELTA Pro is simply unbeatable. This mighty solar generator is at the very edge of what’s currently possible.  EcoFlow RIVER 2 Pro + 220W Solar Panel If you’re in the market for something smaller that can easily be tucked away on a small vessel but still provides a sizable energy kick, the EcoFlow RIVER 2 Pro might well be the answer.  At just 10.6 x 10.2 x 8.9 in (270 x 260 x 226 mm) and weighing 17.2 lbs (7.8kg), it weighs around the same as two and a half bricks to give you a good visualization. The EcoFlow RIVER 2 Pro is considerably smaller than the EcoFlow DELTA Pro and EcoFlow DELTA Max. However, a lot of solar technology is packed into that small exterior. With a capacity of 768Wh, the EcoFlow RIVER 2 Pro supplies more than enough power for camping trips , outdoor group activities, and boat trips.  The EcoFlow RIVER 2 Pro has multiple charging options, including four AC outlets at 800W each, and it can charge multiple items simultaneously. It means no arguing over who gets to charge their phone next! With EcoFlow’s X-Stream technology, it can be charged from 0-100% in just 70 minutes. Relatively small but with plenty of power, the EcoFlow RIVER 2 Pro is an excellent choice for small to mid-sized boats or if you need a highly portable option.    What To Look For When Buying Solar Generators For Boats   There are several essential factors you need to bear in mind if you are thinking about purchasing a solar generator for your boat.   The Size and Power Usage of the Boat  Perhaps the most obvious place to begin is the size of your boat and how much power you are hoping to use. Are you simply looking for something that can power a radio and a fridge while fishing in a small boat or something much larger?  While large generators can undoubtedly be used for smaller jobs, whether you want to fork out more money for much more power than you need is another matter. It can be tempting to go for the biggest and best — and if you have a large boat and need plenty of power, that could be the right solution. But you might be better off with a more compact solar solution if you’re searching for something to power a few low-consumption items on a small sailboat.     If you’re unsure what items you’ll need to power — and how much energy they consume — check out the EcoFlow power calculator to see which solar solution is right for you.   Energy Consumption  Once you have a rough idea of energy use, the next step is to narrow it down to actual consumption. Do you need something to power the entire boat while motoring or dropping anchor? Or are you simply looking for something to supplement your existing power supply?  You’ll need to create an audit of every electrical device you plan to use onboard, including how much power each appliance requires and also the duration of use if they aren’t appliances that run continuously. Fridges, for example, usually remain on 24 hours a day, while you will only use lights, cookers, and phone charging sporadically.  Putting together your power audit can be tricky, but it’s worth the effort. It doesn’t need to be perfect, but it’s certainly worth having a rough idea of your boat’s overall daily and weekly consumption before investing in a solar generator.     Maximizing Solar Collection  The efficiency of solar power has come on by leaps and bounds in recent years — while the price of solar has dropped. But there are a few things to consider before making a purchase. EcoFlow solar generators come in bundles, which means you get a Portable Power Station that can also store electricity from a wall or car output and accompanying solar panels for when you want to go off-grid .  Suppose you’ve done your boat power audit and are staring at an unbelievably high number. In that case, there are two options: reduce the required power input (not always easy for huge boats) and maximize your solar collection.  You can buy more solar panels. But, your generator of choice will have a finite amount of battery storage, meaning extra panels won’t necessarily be the answer unless you have spare batteries to store the additional power (see extra batteries below.)  It’s also worth providing a touch of realism to the off-grid solar dream. Many imagine cruising along under perfect blue skies as their solar panels greedily soak up power, but that’s not always the case. Sunshine can be unpredictable, to say the least, so make sure you have a good idea of the average number of sunny days at your boating destination and check out the upcoming weather forecast.  Solar panels still capture power on cloudy days, but their efficiency may be reduced. Solar Panels Installation Another crucial factor to remember is your solar panels’ size and efficiency and where to install them . EcoFlow currently stocks five solar panel options : 60w, 110w, 160w, 220w, and 400w. You can either purchase these individually or in bundles with your solar generator. All solar panels on offer are portable and easily folded away for space efficiency.  The solar panels come with vastly differing solar collecting abilities, sizes, and prices. It’s all well and good deciding you want a 400 w solar panel, but at 94 inches (239 cm) across when unfolded, it does take up plenty of space, especially if you plan on using it on a small boat.  On the other hand, you can fit a 60 w solar panel into almost any small space, but it doesn’t provide enough solar energy to charge a generator as powerful as the EcoFlow DELTA Pro. Take some time to think about the solar panels you intend to buy. Is there somewhere on the boat they can be easily left open, or will you need to fold and unfold them? And if you plan to leave them unfolded, how will you secure them on the boat?          Extra Batteries     It might be worth investing in an extra battery for longer trips or additional consumption. Smart batteries can make your solar generator go even further.  Extra batteries can be purchased directly from EcoFlow and are easy to attach. Several options are available depending on how much additional power you’re looking for and what solar generator you use. To give you a good idea of how extra batteries work, the EcoFlow DELTA Pro comes with a 3.6kWh capacity. It’s more than enough to power almost anything. But with one EcoFlow DELTA Pro Smart Extra Battery , you effectively double that to 7.2kWh.  It’s not unheard of for boat owners to double or triple up on their battery storage, giving them massive potential power to keep that boat going on those long trips.  The same goes for the smaller and more lightweight EcoFlow River . You can easily attach an extra battery to the generator to double its capacity.    EcoFlow DELTA Smart Generator For large boats and long trips at sea, you have the option to add the EcoFlow DELTA Smart Generator . It provides the ultimate backup solution for the EcoFlow DELTA Pro or Max. The Smart Generator is a standalone generator that can operate independently and seamlessly step in to fill the void if your EcoFlow DELTA Pro or Max runs out of power. Its 4L gas tank can provide enough energy to power the EcoFlow DELTA Max twice over while allowing you to power your essentials in the meantime. It comes with an 1800-watt output, accessed by either AC or DC outlets, while the entire Smart Generator can be controlled and customized through EcoFlow’s app.    With direct DC to DC charging, the Smart Generator is roughly 25% more efficient than other generators, making it a perfect companion for long boat trips where you’re constantly eating up more power than you are producing.   This backup generator is the perfect safety net that will keep the lights on, the fridge cold, and the phones charging long after other generators have packed up and gone home. When your power needs are at their greatest, the Smart Generator is a smart choice.     Whether you’re looking to power a small fishing boat on short trips across the lake, or something more substantial that can sustain a larger boater on longer trips, EcoFlow has the right solar generators to suit every need and situation.  If you’re tired of that awful chugging sound and the smell of fumes typical of diesel generators, then maybe it’s time to switch to something revolutionary. Solar generators can transform your energy supply on marine vessels — not to mention lowering your carbon footprint! Head to EcoFlow for the best and most comprehensive collection of solar generators anywhere on the market for whatever size your boat and your power consumption needs. How to Plan a Cross-Country Road Trip LEAVE A REPLY Cancel reply Save my name, email, and website in this browser for the next time I comment. Privacy Policy Terms of Use © Copyright - EcoFlow, Inc. Forums New posts Unanswered threads Register Top Posts Email What's new New posts New Posts (legacy) Latest activity New media Media New media New comments Boat Info Downloads Weekly Quiz Topic FAQ 10000boatnames.com Classifieds Sell Your Boat Used Gear for Sale Parts General Marine Parts Hunter Beneteau Catalina MacGregor Oday Help Terms of Use Monday Mail Subscribe Monday Mail Unsubscribe wind vs solar power generation Thread starter ken6736 Start date Feb 27, 2005 Forums for All Owners Ask All Sailors As the user of a mooring, and not a dock with shore power, i would love to get some feedback on alternate power sources. I've looked at both wind and solar- both can be expensive- so both is no an option for me. I understand the advantages of both sources- but if i had to choose- what is better? cheaper? easier to install? basic amp hours needed for mainly weekend getaways?...Also..what are the components needed away from the generator itself?, just a charge controller? What rating should i get on that unit? looking for any direction- and recommendations....   when the wind blows... Often, the sun isn’t out, and when the sun is out, the wind often doesn’t blow. I have found, through designing many renewable energy powered land sites, that a combo of both is best. Now, that said, if I was to make a choice, I would go with a wind turbine first such as an Air-X Marine, and then add a 120-200 watt solar panel in the future. The Air-X has a built in charge controller that you can use, and it is easy to set up. If you go Solar, you will need a charge controller of the right size, but they can be had for ~ 65 for a so-so one.here’s a nice site I buy stuff from:http://store.solar-electric.com/chco.html   Depends It depends on the area you are in some areas have better wind or more sunshine. If you live in an area where the wind drops during the day and at night (like the Chesapeake Bay in the summer) you may not get the required wind to generate.Wind gens usually need 10 knots or more to get good output.I would recommend looking at the best sources of wind or sun to determine which application would be the most effective.Search the archives, this has been a popular discussion. Me I like solar....   Another Consideration Morning Ken:What systems to you have running when your away from the boat and how big is your battery bank? Try and figure out what your amp hour usage is while your away from the boat and make your decision based on that information. You might not need as much as you think you do. If what ever system you decide on doesn't have a charge controller(regulator), you'll definately need one or you can cook your batteries dry. They are not that expensive.   First Calculate your needs The first step is to calculate your needs. If your boat is a Catalina 22 with VHF and Depth sounder used a couple weekends a month for daysailing think small solar. Maybe an outboard with a small generator. A larger boat with a diesel may be able to get by with an extra battery and high output alternator. I say solar because the panels are maintenance free and may easily last 20 years. If you have a lot of demand then a combination of charging sources will be required. Some have to have their microwave and air conditioner and water maker and stereo and computer and color TV.... I like to keep it simple. When we kept our boat on a mooring I just took the battery home for charging. Yep it was a pain to get it home and back but it cost nothing as I already had a battery charger. Tom   Amps I've been looking at the ads for Solor and wind generators and all they talk about is watts and volts. Doesn't say anything about amps. Isn't that what I really need to know to determine the capability of the charger? If so, any good links on these that give an AMP layout?   volts times amps equals watts So a 100 watt panel will provide 8.3 amps at 12 volts. Optimal charging of a wet cell is 14.4 volts so your 100 watt would provide only 6.9 amps. Then you have resistence that will drop your voltage. Tom   By the Hour? Ok...now, is that by the hour? When they say 100 watts, is that per hour or minute or second or day? I ask because I've been estimated that I will burn about 145 amps a day and need to charge that back. Like on the link below, it says how many watts for a given wind speed, but it doesn't say what the time frame is.Ex:Output: 400 watts at 28 mph (12.5 m/s)   Watts is per second Amps is a given number of electrons. Usually time is given such as amp/hours Equals one amp/sec for an hour.   80 Watts with a controller I have an eighty Watt solar panel which I use basically to charge my house batteries as well as starting Battery. I have no shore power at my dock and I never have a problem. If I require additional charge due to using to much stuff I will allow my engine to get me back up to par. I have intentionally allow my batteries to discharge to see how long it would take to recharge. It took approximately 4 to 6 hours and I could start my 18 HP motor. Bottom line, I would not have a boat without solar power.   One thing about Solar, I would highly recommend that you get panels that have a blocking diode on each cell, this way if a shadow falls on the panel, it wont take the whole panel out.Uni-Solar is good for this. Plus, you can slightly bend these panels (they are doped on a steel sheet backer, no glass) to form fit your boat, or you can get the fully flexible panels to fit anywhere.   Derek Rowell Correction to p323ms' definitions. Electric "charge" is related to "number of electrons" and is measured in coulombs.Current (in amperes) is the rate of flow of charge, that is a current of one amp is equivalent to a flow of charge of one coulomb per second.Power (measured in watts) is a measure of the rate of flow of energy, which in electrical terms is voltage x current."Ampere-hours" is another measure of charge (usually applied to battery capacity and discharge) and corresponds to a current of one amp flowing for one hour. Similarly "watt-hours" is a measure of energy. These two are related: in a 12 volt system 12 watt-hours is equivalent to 1 amp-hour. (Note that I said equivalent, not equal, because they are different physical quantities).The term amps/sec has no physical meaning.Now regarding solar cells - the manufacturers rated power is the maximum you will get under ideal conditions (sun directly overhead, no clouds, no shadows). The real world ain't really like that, and the total charge you will get on a given day (measured in amp-hours or watt-hours) will be way less than you might think.   Diode on Each Cell Generally when a cell has a shadow over it, it will just not put out as much voltage. Even in a shadow, it will contribute. I can understand putting a diode on the whole system or even a diode on each string, but not on each cell.   Amps/Amp Hours/Watts An amp is so many electrons/sec. An amp-hour is one amp for one hour. A watt is amps times volts. A watt hour is one watt for one hour.   Some answers about Watt, VA, Watt/Hour Question from Franklin..The win-gen you refer to can be set for 12v or 24v system so it rate its output as 400w(at any moment at given wind speed). Which means, when set at 12v it will put out 400/12=33A of current. When set at 24v the current will be half, 16.5A. In case of AC system or when inductive load is in a system then the term VA also used. VA is voltage mutiply current(VA) a power source can supply or a inductive load would absorb and the Watt is actual power really used by the load and convert it to physical force. Watt=VA x efficency factor indicated on the equipment(must >80%, as far as I know)In pure resistance(light bulbs)load, VA is equal Watt regardless it's AC or DC power sourceWatt Hour is merely describ how many watts is used in an hour so the power company can charge accordingly. Or how many hours a house battery would last.Hope this will help.   Not really This is what I need to know. If I am using 145 amps in a day, what percentage of those amps would be recharged if I was running a wind generator that was putting out 400 watts at 28 mph winds? See...I'm missing some piece of information. I know (well...actually a guess from another poster) that I will burn an average of 145 amps in 24 hours. 400w/ 12v = 33.33 amps. But is that per second, per minute per hour, or per day? If it's 33.33 amps per hour, then 33.33amp x 24hours = 800 amps in a day. That doesn't sound right. Sure, that's at 28 mph winds. Lets take 14 mph winds. The scale says it will produce 58 watts. So that comes out to 116 amps a day it will produce. Still sounds a little high to me. Is it?   putting a diode on each cell enables the panel to put out charging voltage even if most of it is in the shade. (if the panel has been made for it) I’ve put in a few dozen solar power systems in remote locations (i was a Radio tower ground tech) and a few boats, it does have a good performance improvement if there is something around to cast shade on the panel. Since doped panels mostly have them built in, it’s a no brainier in my book for marine usage. Almost on any panel not made for it, if there is as little as one cell shaded, it will cause a severe drop in power. BTW, im certified in solar power installations (but not wind, but ive done them too). Also a highly recommended reading resource is Home Power Magazine.   Confusing/Misleading Thread Ken. I recommend you provide us your electrical loads, how many hours per sail you will be using them and how many times per week you will be sailing. Just tell us nav lights, radios, etc and we can make a rough guess. Also include any electrical loads you will have on when away from the boat. Don't be pessimistic with the loads. Be realistic.Also I recommend that you read the following posts:1,2,3,4 and 11. Disregard the rest.   The AIR-X normaly dosnt meet peak output in most areas. I tend to calculate it as a 100 watt power source when im doing averaged calculations. But, it is cheap in comparison to many other turbines I have seen for marine use, and it can put out the 400 watts if you are in a windy area, plus, add in the integrated charge & speed controller, I like to use it for the KISS factor.   Diodes In general there are six solar cells in a series which will deliver about 20V open circuit. That is why solar panels usually have multiples of six solar cells, i.e. 6,12,18, etc. When the panel is delivering 15V there are six cells delivering 2.5V each. You only need one diode per series string. Putting in the other five diodes is redundant and will actually hurt.The diode will cause a drop of about .5 to 1V per diode. If you have six diodes in the string, you will lose from 3 to 6V in the string rather than .5 to 1V with a single diode. If one cell in a string is shaded and is not delivering any voltage, it will not subtract from the string voltage. It just does not contribute. That cell just becomes a conductor.Unless of course, each cell is delivering the full 15V. In that event disregard this post.   This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register. By continuing to use this site, you are consenting to our use of cookies. Accept Learn more… RetireFearless Best Wind Generators For Sailboats Wind generators for sailboats are a great way to power your boat while at sea. But what are the best wind generators for sailboats? October 17, 2023 This article may contain affiliate links where we earn a commission from qualifying purchases. The best wind generators are designed specifically to meet the demands of sailors. These include features like high strength, small size, lightweight, and corrosion resistance. Silentwind, MarineKinetix, Superwind, Rutland, and Automaxx build the best wind generators for sailboats. The wind can be a sailor's best friend or worst enemy. When the wind is blowing, sailors love it because they can harness its power and use it to steer their boat. But when the wind suddenly dies down, the boat will lose momentum and may even drift off course without any way of correcting for this loss in speed. This is where a good-quality wind generator comes into play! Our experts took the liberty of testing and reviewing the best wind generators for sailboats. After hours of testing, we were able to compile a list of the best wind generators for sailboats that are available on the market today. Table of Contents ‍ 1. MarineKinetix MK4+ The  Marine Kinetix MK4+  wind generator is a top-of-the-line device that's perfect for boats and RVs. It features a built-in regulator that ensures your batteries are always fully charged, while its advanced cooling system keeps the unit running smoothly even in harsh weather conditions. The Marine Kinetix MK4+ is a carbon laminated blade turbine. This type of rotor design results in enhanced airfoil aerodynamics that can dramatically improve power generation compared to older designs. It features an ultra-lightweight composite hub and blades, making it exceptionally durable even when exposed to corrosive saltwater or when run through heavy winds or storms. The MarineKinetix is one of the most popular marine wind generators today due to its cutting-edge technology and soundless design. The MarineKinetix is the new standard for anchorages across the world. It has a 44 percent larger swept area than other marine wind generators, allowing it to collect more power and ensuring that all of that power reaches your battery bank safely. The MarineKinetix MK4+ is a hands-off, no-fuss wind energy production system specially designed for use in the sea. The aerodynamic and structural features of this high-output, low startup speed system are based on the finest of European wind science. It also has world-class aerodynamic efficiency, thanks to its carbon-filled aero-acoustic rotor blades, which are designed to minimize noise while maximizing airflow. Furthermore, the MK4+ is an incredibly quiet wind generator; we've never heard one quieter. It has a noise level of only 35 decibels at 17 feet in 10 knots of wind. This makes it perfect for use in small anchorages and crowded harbors. The Marine Kinetix MK4+ is also one the lightest wind generator on the market, weighing in at only 17 pounds. It can be easily transported and is perfect for use with sailboats, powerboats, and RVs. Overall, the Marine Kinetix MK4+ is an incredible wind generator and a great choice for any boat or RV. If you're looking for a quality, durable, and quiet wind turbine, the Marine Kinetix MK4+ is definitely the one for you. Rated power output: 450 watts Rated voltage: 12/24/48V No of blades: 3 Rotor Speed: 500-1000 rpm Weight: 17 lbs Ultra-lightweight and durable construction Easy installation Carbon-laminated blades for enhanced power generation No noise at all! Three-year warranty Not the most powerful turbine around 2. Silentwind 400 Plus The  Silentwind 400 plus  is a wind turbine that has been designed for use in both marine and land-based applications. It is a reliable and efficient turbine that can provide power for boats, RVs, cabins, and other applications where a reliable source of energy is needed. Compared to its predecessors, the new Silentwind 400 plus is equipped with high-duty carbon laminated blades. The company has dubbed these 'Silent Power Blades.' Silent wind claims that these blades provide improved wind monitoring and faster startup times than last generation's 400. These have been tested to work at turbulent speeds, and the generator is IP54 classified as waterproof/weatherproof, which means it will handle high humidity and moderate rain without damage. According to reviews, the 400 plus has a starting speed of 4.2 knots and a max output of 425W at a 30% lower speed than other comparable generators. This is mainly due to the Silent Power Blades, which create less resistance to the wind, along with a three-phase triple alloy magnet generator Because this turbine uses neodymium magnets, it can be used in any weather condition, unlike generators whose magnets will become demagnetized from the effects of wetness. The 400 Plus also has a 1-year warranty. The turbine's blades are easy to access for cleaning or replacement without needing to remove the entire generator. This is an extremely valuable feature as it allows units to remain ready for operation at all times, even if they need servicing. The company claims that this generator also operates more quietly than other models on the market due to its specially designed 'silent power' blades. In addition, this model does not require oiling like some competitor products, which reduces both short-term maintenance needs and long-term expenses. In terms of functionality, this generator can provide energy in most weather conditions due to its high-performance blades, advanced alloy magnets, and high-efficiency circuitry. It also features an easy-access design that allows for quick maintenance, which is invaluable when power needs are critical. The Silentwind 400 plus is rated for 420, 450, and 500 watts. Its available in 12, 24, and 48V models. The 12V model is the most popular, with a weight of only 25 pounds. The turbine has an adjustable speed range of 550 to 1700 rpm, which means it can start at very low wind speeds. Furthermore, the Silentwind 400 plus also has a built-in regulator that protects against overcharging and discharging. It is also equipped with an LED display that shows the turbine's speed, voltage, and amps being generated. This allows the user to make necessary adjustments to ensure maximum efficiency. The only drawback we could find was that the company does not currently have a distributor in the United States. However, Silentwind has stated that they are working on this and hope to have a U.S. distributor soon. Also, due to range limitations, the Bluetooth feature is virtually useless in the open ocean. Overall, the Silentwind 400 plus is an efficient and well-made wind turbine that can provide power for various applications. It is reliable, easy to use, and has been tested at hurricane speeds. It is a great choice for anyone looking for a dependable source of energy for their sailboats. Rated power output: 420/450/500 watts Rotor Speed: 550-1700 rpm Generator weight: 15 lbs High-duty carbon laminated blades Quiet operation Minimal maintenance required Adjustable speed range Built-in regulator U.S. distributor not yet available Bluetooth feature useless in the open ocean 3. Rutland 1200 Wind Turbine The  Rutland 1200 Wind Turbine  is an efficient and reliable model that's capable of powering anything from sailboats to recreational vehicles. It has a durable, white epoxy-encapsulated frame, carbon fiber blades, and sealed bearings for consistent power generation. The turbine works best in light-to-medium wind conditions but can also charge 12 V batteries on larger vessels or RVs. At 500 watts, the Rutland 1200 is a medium-sized turbine that packs a powerful punch without taking up too much room. The turbine features a sleek and modern design that blends in perfectly with any sailboat or RV. The Rutland 1200 is a top-of-the-line wind turbine that's built to last. It has a sturdy frame, carbon fiber blades, and sealed bearings that can withstand even the harshest marine environment. The turbine also features a smart controller that prevents overcharging and protects your batteries from damage. Best of all, this turbine is easy to install. The manufacturer includes all the necessary hardware, so you can simply attach it to your mast. It also comes with an emergency tiller control that allows you to harness power when needed during an emergency situation, and the design of the blades ensures that the wind is captured smoothly and efficiently. The Rutland 1200 is a top-of-the-line wind turbine that's built to last. It has a sturdy frame, carbon fiber blades, and sealed bearings that can withstand even the harshest marine environments. The turbine also features a smart controller that prevents overcharging and protects your batteries from damage. According to some users, the rotor was too small for larger boats or RVs and didn't generate enough power to be useful in high winds. Others said the blades were too noisy and made too much vibration when in use. It's also relatively expensive, although the price tag is to be expected considering the brand name and its capabilities. Overall, this turbine is a great option for anyone who's looking to take their boat or RV off the grid. It has a durable design that can withstand harsh conditions, easy installation, and smooth operation. It's an excellent choice for those who have been looking to harness wind power but don't want to spend too much money on a DIY kit. Rated power output: 500 watts Rated Voltage: 24 V Blade diameter: 48 inches Weight: 17.2 lbs Durable and well-built construction Highly portable – easy to install and uninstall Too small for larger vessels or RVs Makes too much vibration when in use 4. Superwind 350 The  Superwind 350  is a small, lightweight wind turbine that is perfect for sailboats. When in operation, it can charge various batteries, including the 12V battery found in most sailboats. This unit has a power output of 350 watts and is equipped with an LED display that shows how much energy is being generated. The Superwind 350 also comes equipped with Auto-Feathering Overspeed-Avoidance System. In layman terms, this system prevents the turbine from spinning too fast and damaging the blades. It does this by sensing when the wind speed is too high and then automatically slowing down the turbine. This system is especially valuable for sailors who often find themselves in high winds and can prevent costly damage to the turbine. The blades' speed decreases as the wind speed rise to 25 knots; they start "feathering" (dumping air) to be less efficient and slower. However, as the wind dies down, the blades re-pitch, becoming more effective. In comparison to other comparable products, this action delivers a steady stream of charging current to the batteries without shutting down to avoid overcharging. The Superwind 350 can also run in combination with solar panels and traditional diesel generators, making it the perfect choice for sailors who charge their batteries with multiple sources throughout the day. In addition, this turbine can be used in conjunction with a voltage-sensitive relay to automatically start and stop a generator based on the battery's state of charge. Furthermore, The Superwind generator family also employs a brushless A/C stator to minimize noise and radio interference while the unit is generating power. This is a great feature for sailors who want to run power-intensive electronics such as refrigerators and air conditioners. The only drawback we could find was that it's not the quietest. This could potentially cause issues, especially if you're trying to sleep below deck. Overall, the Superwind 350 is a great choice for sailboats looking for an efficient and reliable wind turbine. It is easy to use and comes equipped with various safety features. It is also compatible with a variety of battery types and solar panels. Rated power output: 350 watts Rotor Speed: 450-1250 rpm Weight: 24 lbs Automatic speed regulation system (feathering and re-pitching) prevents damage to the turbine. Compatible with solar panels and traditional generators Not the quietest turbine on the market 5. AutoMaxx DB-400 Wind Turbine AutoMaxx DB-400  is a great and affordable choice for any boat or RV owner looking to harness the power of the wind. It features large blades that allow it to generate more energy than most other marine turbines out there, while its lightweight and compact design make it easy to transport and store when not in use. The AutoMaxx DB-400 is an expertly designed and efficiently engineered model that's capable of powering any vessel or recreational vehicle. It has a sleek and ergonomically designed white rotor, bearings, and hub that ensure fast wind speed increases for optimum energy production. The turbine is also made from durable, high-quality materials that can withstand harsh marine environments. The AutoMaxx DB-400 wind turbine installs easily and quickly on any boat or RV, and it comes with all the necessary mounting hardware. Once installed, it's easy to use and requires minimal maintenance. The turbine has been designed for 12 V systems, and it's capable of producing up to 400 watts of power. When it comes to performance, the AutoMaxx DB-400 Wind Turbine really shines. The turbine has been tested in some of the worst wind conditions and still produces more than enough power to keep your batteries charged. It has a sturdy, all-weather design that can easily handle heavy winds and rough conditions. It's also extremely quiet and vibration-free, making it the perfect choice for any boat or RV owner looking to harness the power of wind energy. According to a few users, the devices didn't spin at the stated cut-in speed and generated less power than expected, although most people said they worked as predicted. It's tough to tell whether these flaws are due to poor installation, miscommunication between vendors and consumers, or unrealistic expectations. It's always a good idea to put your device through its paces when it arrives to ensure that it's functioning as intended. Overall, the AutoMaxx DB-400 Wind Turbine is an efficient and reliable model that comes at a great price. If you're looking to get started with wind energy on your boat or RV but don't want to spend too much, this turbine is definitely the best choice for you. Rated power output: 400 watts Rated voltage: 12 V Sturdy and durable construction Lightweight and compact design Budget-friendly Poor performance in high winds Not the most efficient in its class Recent Articles What Size Sailboat Can One Person Handle? How To Tie A Sailboat To A Mooring Ball Ring What Is The Ideal Wind Speed When Sailing? How To Use a Sailboat Winch Things You Need To Liveaboard a Sailboat Types of Sailboat Keels I'm Michael Moris. I've been sailing my whole life, and it has taken me to places I never imagined. From the Caribbean to Europe, from New Zealand to South America - there's nowhere that hasn't felt like home when you're on a boat! Trending Articles How Far Is Havana From Miami By Boat? Yachting Vs Sailing Who Is Sailing Doodles? Subscribe To Our Newsletter Thank you! You're signed up for our free newsletter! Oops! Something went wrong while submitting the form About Our Team We are a publishing team of licensed Nursing Home Administrators, Nurses, Assisted Living Directors, Health Professionals, Gardeners, and individuals with vast experience with senior living and activities. ©2024 Retire Fearless. All rights reserved. We can be reached via email at [email protected] Retirefearless.com is a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for sites to earn advertising fees by advertising and linking to Amazon. This site also participates in other affiliate programs such as CJ, ClickBank and more, and is compensated for referring traffic and business to these companies. Facebook Pinterest Patriot Team Development Patriot Renewables, LLC is a developer, owner, and operator of commercial-scale wind and solar energy projects. Patriot currently operates projects in Maine, Massachusetts, and Illinois. The Patriot team is made up of skilled individuals with proven abilities in project development, renewable energy, and environmental stewardship. Patriot Renewables is an affiliate of  Jay Cashman, Inc. , an experienced, multidisciplinary East Coast construction firm that lends its expertise and resources to design, develop, and construct complex wind and solar projects. Please visit Patriot Renewable Energy Capital  if you are a renewable energy developer seeking a tax equity partner. As of September 1, 2024, through the generation of clean wind energy, Patriot Renewables' Maine projects have avoided the equivalent of 3,408,526,223   lbs. of CO 2 emissions, or what would be produced annually by 367,970   passenger vehicles.  *Based on a rate of 1562.4 lbs CO2/MWh, the U.S. national weighted average CO2 marginal emission rate, year 2019 data, and entered into the equivalency calculator at  https://www.epa.gov/energy/greenhouse-gas-equivalencies-calculator . 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Financial Freestyle Capitol Gains Living Not So Fabulously Decoding Retirement Fantasy football Pro Pick 'Em College Pick 'Em Fantasy baseball Fantasy hockey Fantasy basketball Download the app Daily fantasy Scores and schedules GameChannel World Baseball Classic Premier League CONCACAF League Champions League Motorsports Horse racing New on Yahoo Privacy Dashboard Yahoo Finance Solar panel giant to axe a fifth of its workforce. One of Europe’s largest solar panel manufacturers has announced it will cut about 200 jobs as it battles to return to profitability amid stiff competition from China. Meyer Burger said its chief executive is leaving the company as it announced plans to reduce its global workforce from about 1,050 to 850 by the end of 2025, predominantly in Europe, as it focuses operations on the US. It said Gunter Erfurt would be replaced by executive chairman Franz Richter immediately, with chief financial officer Markus Nikles stepping down in September. Meyer Burger reported a loss of 292m Swiss francs for 2023, which it blamed on “severe price undercutting in the European solar market”. It comes amid a flood of Chinese products onto the European market. Zürcher Kantonalbank analyst Bernd Laux said: “This drastic measure is sensible, but it comes too late. “It remains to be seen whether it can prevent Meyer Burger’s slow demise.” Read the latest updates below. 05:06 PM BST Signing off.... Thanks for joining us today. Please join us over on our live blog covering the Fed’s interest rate decision . 04:53 PM BST Ftse closes down. The FTSE 100 closed down 0.7pc this afternoon. The top riser was Durex maker Reckitt Benckiser, up 1.2pc, followed by Rightmove, up a similar amount. The biggest faller was JD Sports, down 6pc, followed by Rentokil Initial, down 4.6pc. Meanwhile, the mid-cap FTSE 250 fell 0.5pc. The top riser was North Atlantic Smaller Companies, up 4.4pc, followed by Aston Martin, up 2.8pc. At the other end of the index, Carex maker PZ Cussons fell 15.2pc, while JTC (Jersey Trust Company) fell 5.6pc. 04:47 PM BST ‘subopimal’ use of gas turbines leaves britain importing power. Britain’s gas turbines are being used in a “suboptimal” way, according to a solar energy data company, as Britain relies on imported energy. Ben Watts, of Kilowatts.io, wrote on LinkedIn: Working part-time might sound great, but for gas turbines, it’s a different story. Combined Cycle Gas Turbines are facing challenges from wind, solar, and cheap imports. The majority were designed for baseload, not flexibility. In 2024, even during the most profitable hours, less than half of the CCGT capacity has been online. Surprisingly, over half of the time this year, only around 20pc of the CCGT capacity has been in operation... It’s great to reduce overall emissions, but maintaining an efficient CCGT fleet with such low running hours feels subtopimal when we’re still installing gas boilers instead of heat pumps. 03:58 PM BST Markets on edge ahead of fed decision. World stock prices are generally down this afternoon, with the MSCI World index down 0.1pc as investors await news of US interest rates. Chris Beauchamp, chief market analyst at online trading platform IG, said: The tension is palpable across markets this afternoon, as they stand on the verge of the most unpredictable Fed meeting in recent memory, and one that seems to provide the most potential for volatility in some time. So many questions need to be answered that Powell will have a high bar to clear if he and his committee are to avoid some fairly dramatic moves in volatility coming days. 03:54 PM BST Starmer ditches plan to roll out ‘not for eu’ stickers on british food items. Sir Keir Starmer has scrapped plans to put “Not for EU” stickers on milk, butter, meat and fish being sold in British supermarkets. Hannah Boland reports: The Government is understood to have told UK food makers that it will indefinitely postpone new post-Brexit labelling rules, which had been drawn up by the previous Conservative government. The rules were set to require all meat, fish and dairy products in Britain to carry labels denoting they could not be sent to the EU and were expected to come into force from next month. The policy, part of the Windsor Framework to oversee the flow of imports between Northern Ireland and the Republic of Ireland, had been touted by Rishi Sunak as an effort to ensure that the same goods were on shelves across the entirety of the UK. Meat and dairy products being sent from Britain to Northern Ireland already have to carry the stickers. However, the Department for Environment, Food and Rural Affairs is understood to have told suppliers it has indefinitely delayed the need for all products to have stickers regardless of where they were being sent. Read the full story... 03:40 PM BST Italy poised to regain wine crown from france. Italy is due to regain its spot as the world’s largest wine producer this year as France’s vineyards have been hit by unfavourable weather, according to figures from each country’s agricultural authorities. After a disastrous 2023 harvest, Italy’s production will recover eight percent to between 41m and 42m hectolitres, the country’s main agricultural association Coldiretti said . The French agriculture ministry had estimated earlier this month that French production will fall 18pc to 39.3m hectolitres. Coldiretti noted that this year’s output in Italy still remains well under the average of recent years, as different parts of the country cope with either heavy rains or drought. Since 2007, Italy has been the world’s top producer each year apart from 2011, 2014 and 2023, when it was pipped by France, according to the International Organisation of Vine and Wine (OIV). Coldiretti said Italy is “divided in two” with the north hit by “intense rain and hail in spring and early summer”, while large parts of the south and Sicily have faced drought. With that I will head off for the day and leave you in the hands of Alex Singleton , who is also running our live blog on the US Federal Reserve’s interest rate decision . Enjoy! 03:23 PM BST Alaska airlines boss hails ‘significant improvement’ at boeing after mid-air blowout. The boss of Alaska Airlines said his company has seen “significant improvement” at troubled planemaker Boeing in recent months after the mid-air blowout on one of its flights that plunged the manufacturer into turmoil. Alaska Airlines, which is getting its 12th airplane in 2024 from Boeing this week, has stepped up oversight of new planes and has its own staff at the factory auditing production. A door plug missing key bolts blew off one of the carrier’s new 737 MAX 9 jets at 16,000 feet in January. Alaska Airlines chief executive Ben Minicucci said: “We saw a lot of significant improvement in the last few months.” Mr Minicucci also said he does not expect to receive 737 MAX 10 airplanes until at least mid-2026. The Federal Aviation Administration has yet to certify either the MAX 7 or MAX 10 variants. 03:02 PM BST Pound hits two-year high ahead of ‘pivotal’ us interest rate decision. The value of the pound has surged to its highest in two years ahead of the Federal Reserve’s next decision on interest rates. Sterling has risen 0.6pc today against the dollar to $1.323, which it has not reached since March 2022. It comes as policymakers in the US are expected to cut borrowing costs for the first time in four years. Money markets indicating there is a 66pc chance that this will be by an outsized half a percentage point from the present range of 5.25pc to 5.5pc, where interest rates have stood since July last year. Meanwhile, the Bank of England is widely expected to keep interest rates unchanged at 5pc on Thursday, after services inflation rose from 5.2pc to 5.6pc in August. David Morrison, senior market analyst at Trade Nation, said the meeting is “likely to trigger some market turbulence”. He said: “It’s extremely rare to go into a Fed meeting with this amount of uncertainty. This is extremely unfortunate given the pivotal nature of tonight’s decision.” 02:32 PM BST Wall street mixed ahead of fed interest rate decision. US stock markets lacked direction ahead of a pivotal interest rate decision by the Federal Reserve which could see borrowing costs cut for the first time in four years. The S&P 500 edged up 0.1pc to 5,640.88 as traders bet there is a 64pc chance that policymakers will reduce borrowing costs by half a percentage point, with at least a quarter of a point cut priced into money markets. The Dow Jones Industrial Average fell 0.1pc to 41,554.11 while the tech-heavy Nasdaq Composite rose 0.2pc to 17,663.91. 02:26 PM BST Carex soap maker pz cussons plunges amid nigeria losses. PZ Cussons, the maker of Carex soaps, has seen shares plummet after last year’s 70pc devaluation of the Nigerian currency pushed it to a loss. The FTSE 250 company’s shares suffered thier worst day since February as it swung to a £95.9m loss for the year ending May 2024, down from a £61.8m profit the year before. Chief executive Jonathan Myers said that despite “strategic” progress, the devaluation of the naira had “significant implications on our reported financials”. He added: “We have worked hard to mitigate the impact of this on the group, while continuing to serve Nigerian consumers who are facing unprecedented inflation and economic difficulties.” Shares in the company fell as much as 17.6pc as it also slashed its annual dividend to shareholders by 44pc to 3.6p. It comes after the company said it was exploring the sale of its entire African business earlier this year, and put its tanning business St Tropez up for sale, as part of a turnaround plan. Mr Myers added: “We are progressing with our plans to sell St Tropez and have received a number of expressions of interest for our African business, recognising the potential of our brands and people, which could lead to a partial or full sale.” 02:06 PM BST Ladbible hails record readership as it expands in us. The owner of LadBible said it has brought in a record number of readers, viewers and listeners in the first half of 2024, with its content reaching 494m people. LBG Media, which also owns the UniLad and SportBible brands, said it swung to a profit of £7.1m over the period, up from a £1.2m loss last year, while revenue grew 29pc to £42.3m. The company said it has built market share in the US, with 141m of its audience members coming from the country. Solly Solomou, chief executive of LBG Group, said the company is “going from strength to strength” in the US. Part of that was by buying female-focused digital media group Betches Media for $24m (£18.19 million) last year. Mr Solomou said: “In the complex digital media landscape, the detailed understanding we have of our audience and our propensity to be agile in such a dynamic market provide a strong foundation for long-term growth and the delivery of shareholder value.” 01:49 PM BST British steel losses surge above £400m with thousands of jobs at risk. British Steel plunged to a £400m loss amid growing concerns that the company’s financial woes will threaten thousands of jobs. Our reporter James Warrington has the details: The steelmaker, which is owned by Chinese conglomerate Jingye Group, made a pre-tax loss of £408m in 2022, an eight-fold increase on the £50m losses made in the prior year. Bosses blamed a “highly volatile” trading environment amid surging energy and commodity prices as well as fluctuating demand. The steelmaker is locked in talks with the Government about a £1.25bn decarbonisation plan as it attempts to transition from conventional furnaces to greener, electric equipment. Bosses are hoping to secure public funding similar to the £500m package handed to rival Tata Steel last week. But the state aid is yet to materialise and the company is reportedly planning to shut down the blast furnaces at its Scunthorpe site, putting 2,500 jobs at risk. Such a move would also mark the end of UK steel production, with the roughly 3m tons of steel currently produced at the plant potentially replaced by imports from China. British Steel was launched in 2017 after private equity firm Greybull Capital acquired a UK division from Tata Steel. Greybull revived the historic “British Steel” name, which had been used for the UK’s nationalised steel industry until privatisation in the 1980s, and eventually sold the business to Jingye in 2020. British Steel recorded a £203m impairment, which it said reflected the “deteriorating outlook” for its blast furnaces in Scunthorpe. 01:32 PM BST Tgi fridays’ uk arm falls into administration. The UK operator of TGI Fridays has gone into administration as the hospitality company scrambles to sell its chain of 87 restaurants across the country. Hostmore said it had appointed joint administrators from Teneo. The company is in the process of trying to sell the UK restaurants to new owners, which it hopes to complete by the end of September. This would keep the TGI Fridays brand alive on British high streets and save thousands of jobs. But it said earlier this month that it was not expecting to “recover any meaningful value” from the sale of sites, meaning it would earn less from the sale than it owes to creditors and banks. It is also not clear whether it will secure a buyer for the entire chain, or whether it will manage to sell some but not all of the restaurants. The American-inspired restaurant chain is open as normal while the administration process starts. 01:23 PM BST Train drivers accept pay deal as starmer caves to union’s demands. Train drivers have voted to accept a multi-year pay deal, bringing an end to two years of strikes . Aslef, the train drivers’ union, said 96 per cent of its members had in favour of a deal it said was worth 15 per cent over three years. The union said turnout was 84 per cent. The offer was made by the Government within weeks of Labour winning the general election . The ballot result ends what Aslef called “the longest train drivers’ strike in history”, during which drivers took 18 days of strike action. The union had accused the previous Conservative government of “sitting on its hands” and refusing to negotiate. Read what Aslef general secretary Mick Whelan said about the pay deal . 01:15 PM BST Us stock markets poised for subdued start ahead of fed rate decision. US stock markets were subdued in premarket trading as skittish investors waited for the Federal Reserve to cut interest rates for the first time in more than four years. Most traders are betting on a half-percentage-point reduction of borrowing costs that have stayed at their highest levels in over two decades since July 2023. The central bank last hiked interest rates by 25 basis points to between 5.25pc and 5.5pc. In premarket trading, the Dow Jones Industrial Average was up 0.1pc, the S&P 500 was flat and the Nasdaq 100 was up 0.1pc. The Russell 2000 index, tracking small caps stocks, which tend to fare better in a lower interest-rate environment, were also flat. 12:29 PM BST Why the bank of england is preparing to ‘hit the pause button’ on interest rate cuts. Inflation held steady last month, keeping interest rates on track to fall this year in a boost for Sir Keir Starmer. But our economics editor Szu Ping Chan outlines how one measure of price rises has alarmed economists: Prices, as measured by the Consumer Prices Index (CPI), rose by 2.2pc in the year to August, according to the Office for National Statistics (ONS). This was unchanged from July despite a big jump in European airfares as parents took their children away for the summer holidays. The headline rate was also in line with economists’ expectations. Read why the Bank is expected to keep rates on hold at 5pc . 12:11 PM BST Zürcher Kantonalbank analyst Bernd Laux said: This drastic measure is sensible, but it comes too late. It remains to be seen whether it can prevent Meyer Burger’s slow demise. 11:55 AM BST Post office boss to quit as horizon scandal inquiry rumbles on. Post Office boss Nick Read will step down from the role next year, the company has said. Mr Read described it as a “great privilege” to have worked as chief executive in an “extraordinarily challenging time for the business and for postmasters”. He had previously announced his intention to temporarily step back from the role to give his “entire attention” to the next stage of the Horizon IT inquiry. Interim chief operating officer Neil Brocklehurst has been asked by the Post Office’s board to step up as acting chief executive while Mr Read prepares for the inquiry, the company said. Mr Read took on the chief executive position in 2019, succeeding former boss Paula Vennells, who this year forfeited her CBE following public anger over her handling of the Horizon crisis. His decision to step down in March next year comes during the continuing fallout from the Horizon scandal - which included MPs expressing a lack of confidence in his leadership at the business and trade committee in February. 11:39 AM BST Reeves aims to end gender pay gap as first female chancellor. Rachel Reeves has said she intends to use her position as the first female Chancellor to “improve life for women”, as she set out plans to support women in business. Ms Reeves said it is a “huge responsibility” to head the Treasury and she is aiming to close the gender pay gap, strengthen rights at work and invest in childcare. Announcing the Government’s support for the Invest in Women Taskforce, which aims to increase investment funding pools for female founders, the Chancellor vowed to improve the economic opportunities available to women. The taskforce is aiming to create a funding pool of more than £250m for female-founded businesses through private capital, making it one of the world’s largest investment funding pools aimed solely at female founders. The Rose Review, an independent review of female entrepreneurship led by Dame Alison Rose, found that if the UK were to have the same share of female entrepreneurs as similar countries, £200 billion of value would be added to the economy. Ms Reeves is expected to take an active role in steering the taskforce’s priorities and objectives. She said: It is a huge responsibility to sit in the Treasury as the first female Chancellor of the Exchequer and be able to use my position to improve life for women across the UK - one that I don’t take lightly. That includes ending the gender pay gap, strengthening rights at work and investing in childcare. 11:22 AM BST Gas prices fall as europe expected to ride out winter. Gas prices have fallen as flows from Norway boost confidence that Europe has enough of the fossil fuel to see it through the winter. Dutch front-month futures, the benchmark for the continent, slumped as much as 2.3pc to less than €35 per megawatt hour as pipeline exports from the Scandinavian country’s fields jumped nearly 13pc. Maintenance work at Norway’s sites are coming to an end, just as Bloomberg analysts predict Europe will end the winter with stocks still 40pc full if temperatures stay at normal levels. The UK’s equivalent gas contract was down as much as 2.5pc today to around 83p per therm. 10:59 AM BST Oil prices fall ahead of fed rate cuts. Oil prices have slipped following a two-day gain as traders assessed the scale of potential cuts to the Federal Reserve’s interest rates. Global benchmark Brent fell 1.6pc below $73 a barrel, while West Texas Intermediate was down 1.8pc below $70. It comes despite rising tensions in the Middle East, after Hezbollah accused Israel of orchestrating an attack involving pagers in Lebanon that left a number of people dead and wounded thousands. However, traders expect the Federal Reserve to begin cutting interest rates today for the first time in four years, weakening the dollar and making commodities cheaper. 10:37 AM BST Imf cancels talks with russia amid outcry over ukraine war. The International Monetary Fund has cancelled its first planned consultations with Russia since the start of Vladimir Putin’s war in Ukraine, amid criticism from the West. IMF officials told Russia that the mission was being delayed for “technical” reasons, the Tass news service reported. Europe is opposed to the IMF resuming talks with Moscow ahead of a planned visit, which would be its first since 2019. Several EU nations have challenged the IMF’s decision to engage with Russia, arguing that it risked legitimising Kremlin efforts to evade Western sanctions imposed since the war began in February 2022. 10:11 AM BST Eurozone inflation remains above target despite rate cuts. Inflation in the eurozone has fallen to a three-year low but remains above the European Central Bank’s target despite it cutting interest rates. The consumer prices index in the single currency bloc dropped to 2.2pc in August, down from 2.6pc in July. The European Central Bank, which has an inflation target of 2pc, began cutting interest rates from record highs of 4pc in June. It cut rates for a second time last week to 3.5pc. Euro area annual #inflation at 2.2% in August 2024 https://t.co/pfx1CxDhIt pic.twitter.com/WKyaY9aKbL — EU_Eurostat (@EU_Eurostat) September 18, 2024 09:54 AM BST House prices grow at slower pace ahead of rate cut decision. Average house prices rose at a slower pace across the UK in the year to July, official figures show, shortly before the Bank of England announced its first interest rate cut in four years. Average UK house prices increased by 2.2pc to £290,000, the Office for National Statistics (ONS) said, which was down from 2.7pc in the 12 months to June 2024. Meanwhile, average UK private rents increased by 8.4pc in the year to August, down from 8.6pc the previous month. ONS head of housing market indices Aimee North said: Annual house price growth slowed this month. The North East saw the highest annual growth while London was the only region to show annual price falls. Rental prices continue to climb at a near-record rate, although the pace of the increase has slowed slightly. London again saw the fastest growth in rents, with the slowest rise in the South West of England. Nick Leeming, chairman of estate agent Jackson-Stops, said: “For the first time, house prices are reflecting a cautiously positive afterglow from Labour’s election victory and showing a promising picture for the start of autumn. “Post-election stability coupled with the first base rate cut in four years - which has steadied mortgage rates - have renewed buyers’ intent and underpinned stronger house price growth.” 09:36 AM BST Asda chairman takes control of struggling supermarket as mohsin issa steps down. Asda has revealed that co-owner Mohsin Issa is to step down from his executive role at the supermarket as it continues to lose market share. Asda said Mr Issa will this week leave his executive role to concentrate on his recently announced move to become sole chief executive of the petrol station forecourts business, EG Group. He will hand over the reins to chairman Lord Stuart Rose but will remain co-owner of the chain, alongside private equity backer TDR Capital, and a non-executive on the board. Asda said it will continue its hunt for a chief executive to lead the company and will update “in due course”. It comes as Asda has lost market share and sales tumbled 6pc in the 12 weeks to Aug 4, according to Kantar. Lord Rose will take on Mr Issa’s executive responsibilities at Asda, alongside TDR partner Rob Hattrell and the supermarket’s existing management team. Mr Issa said: “I have decided now is the right time for me to step back from my oversight role at Asda to focus on EG Group as sole chief executive. “It is a very exciting time for EG Group, and I am looking forward to focusing on the business while supporting Stuart, Rob and the leadership team in my capacity as a shareholder of Asda.” 09:16 AM BST Google’s €1.5bn eu fine thrown out after court battle. Google has won a court challenge against a €1.5bn (£1.3bn) European Union fine over its online advertising business. The European Union’s General Court said it was throwing out the 2019 penalty imposed by the European Commission. “The General Court annuls the Commission’s decision in its entirety,” it said. The commission’s ruling applied to a narrow portion of Google’s ad business: ads that the US tech giant sold next to Google search results on third-party websites. Regulators had found that Google inserted exclusivity clauses in its contracts that barred these websites from running similarly placed ads sold by Google’s rivals. The commission, the EU’s competition enforcer, said when it issued the penalty that Google’s behaviour resulted in advertisers and website owners having less choice and likely facing higher prices that would be passed on to consumers. 09:01 AM BST Ftse 100 falls ahead of ‘uncertain’ federal reserve interest rate decision. British stock indexes retreated as investors awaited the highly anticipated yet uncertain Federal Reserve decision on interest rates this evening. The blue-chip FTSE 100 was down 0.3pc while the FTSE 250 fell 0.2pc, having both closed at their highest since early September on Tuesday. Consumer price index inflation was unchanged at 2.2pc in August but exporter came under pressure as the pound moved higher following a rise in services inflation - a figure closely watched by the Bank of England. Globally, investors remain focused on the Federal Reserve, which is expected to cut interest rates later, although the size of the reduction is still not clear. Pricing for a larger-than-usual 50-basis-point rate cut - equivalent to half a percentage point - has leapt to 68pc on money markets, up from around 18pc a week ago. Deutsche Bank analyst Jim Reid said: “You’d have to go back over 15 years to find such an uncertain situation this close to the decision. A lot of money will be made and lost today.” Across the FTSE 350, industrial miners lost 0.8pc as metal prices eased ahead of the Fed decision. In corporate news, Reckitt Benckiser rose as much as 3.3pc to the top of the FTSE 100 after a media report that the company has launched early discussions with potential suitors for a sale of its homecare assets. 08:44 AM BST L&g strikes £1.4bn deal to sell cala homes to us private equity giant. Insurance and asset management giant Legal & General (L&G) has agreed to sell its housebuilding subsidiary Cala back to its former owner in a £1.4bn deal. Investment firms Sixth Street Partners and Patron Capital have formed a joint venture to buy Cala, which is among the UK’s 10 biggest housebuilders. Patron Capital formerly part-owned Cala, holding a 46.5pc stake in the company alongside L&G. However, it offloaded its stake to L&G in 2018. Founded in 1875 as the City of Aberdeen Land Association, Cala focuses on the premium end of the market, building homes in the south of England, the Cotswolds and Scotland. It employs more than 1,300 people across 10 offices, and sold just under 3,000 homes last year. The deal will see L&G get £1.2bn, with the rest coming from the buyers acquiring Cala’s net debt. L&G shares fell 1.9pc despite it saying it could use some of the proceeds to return cash to shareholders via share buybacks. Antonio Simoes, chief executive of L&G, said the deal is part of “simplifying our portfolio”. 08:33 AM BST Services inflation too high for rate cuts, say economists. Services inflation is too high for the Bank of England to cut interest rates this week, economists have warned. The rate of price rises in services hit 5.6pc in August, up from 5.2pc in July, while core inflation, which strips out volatile food and energy prices, rose from 3.3pc to 3.6pc. NIESR associate economist Monica George Michail said: “Given that inflation is set to gently rise towards the end of the year, and that underlying inflation remains elevated, this reduces chances of a rate cut tomorrow, and new developments will be closely monitored by the Monetary Policy Committee.” Jake Finney, economist at PwC, said the “Taylor Swift effect” may be partly behind the more than doubling in cinemas, theatres and concerts price inflation, which jumped from 4.4pc to 9.2pc last month, with August seeing the last of her UK dates for the Eras tour. He added the latest data overall “suggests that a September rate cut is unlikely”. He said: “However, we expect that the latest inflation data will do little to dissuade the Bank from cutting in November, given that headline and services inflation are both tracking lower than their latest externally published forecasts.” Sanjay Raja, chief UK economist at Deutsche Bank Research, added: “Looking through the Bank of England’s range of underlying services measures, we still see some marginal improvement in the data despite the uptick in the headline services measure, with underlying inflation continuing to ease. This is good news for the MPC. That said, today’s data won’t be enough to trigger a surprise rate cut tomorrow.” 08:16 AM BST Campari group boss quits. The boss of Aperol maker Campari has quit after a short spell leading the Italian drinks company. Matteo Fantacchiotti said he was leaving for personal reasons just five months after taking over the role from long-standing chief executive Bob Kunze-Concewitz. The move comes after Campari shares fell 5.6pc following comments by Mr Fantacchiotti at a financial conference on Friday about the sector’s ongoing weakness in the current quarter. Shares of the Skyy vodka maker have fallen 16pc since he took the helm in April. 08:05 AM BST Uk markets fall as inflation remains stubborn. The FTSE 100 fell as trading began as inflation remained stubbornly above the Bank of England’s 2pc target. The UK’s blue-chip stock index dropped 0.2pc to 8,294.56 as traders also wait to see the scale of interest rate cuts expected to be announced by the US Federal Reserve this evening. The FTSE 250 fell 0.1pc to 20,911.59 as services inflation in Britain rose from 5.2pc to 5.6pc, likely meaning rates will remain on hold when the Bank of England announces its next decision tomorrow. 07:54 AM BST Tupperware files for bankruptcy. Away from inflation briefly... Tupperware, the household name behind the colourful plastic food containers, has filed for bankruptcy in the face of mounting losses. Our reporter Adam Mawardi has the details: The kitchenware company and some of its subsidiaries filed for Chapter 11 bankruptcy protection in the US. The Florida-based business, founded in 1946, said it is seeking court permission to begin the sale process and aims to continue operating during this period. Tupperware listed between $1bn and $10bn is estimated liabilities with between only $500m and $1bn in estimated assets, according to bankruptcy filings submitted to Delaware’s bankruptcy court. Laurie Ann Goldman, chief executive, said: “Over the last several years, the company’s financial position has been severely impacted by the challenging macroeconomic environment. “As a result, we explored numerous strategic options and determined this is the best path forward.” The company said that it has made “significant progress” in modernising its operations following the appointment of a new management team in the past year. The brand became a household name in the 1950s and 1960s at Tupperware Parties, where people gathered in homes to buy and sell the containers. The 78-year-old firm has recently attempted to boost revenue by remarketing itself towards a younger audience. Its share price has fallen nearly 8pc in after hours trading. 07:51 AM BST Air fares accounted for majority of rise in inflation. Economists think it bodes well for rate cuts later this year that the majority of the inflation pressure in August came from rising air fares, rather than wage increases. Thomas Pugh, economist at RSM UK, said: The rebound in services inflation in August makes an interest rate cut tomorrow even less likely, but this is just a bump in an otherwise downward path. Services inflation should continue to slow over the rest of the year, leaving the door wide open for one, or even two, more cuts towards the end of the year. Overall, we’re not worried about the rebound in services inflation, it was driven by erratic airfares. Most other sectors show that price pressures are continuing to ease. While there is little chance that the MPC will cut interest rates tomorrow, we think the chances of getting two cuts towards the end of the year are rising. IEA economist Julian Jessop agrees: Digging deeper, the jump in air fares added just under 0.2 percentage points to *overall* inflation (and therefore accounted for the bulk of the 0.4pp rise in *services* inflation)... 🤓 — Julian Jessop FRSA (@julianHjessop) September 18, 2024 07:43 AM BST Traders reduce bets on bank of england cutting interest rates. Traders are betting there is an even smaller chance of the Bank of England cutting interest rates tomorrow after services inflation rose from 5.2pc to 5.6pc. Money markets indicate there is a 14pc chance that the Monetary Policy Committee will reduce borrowing costs, down from 25pc before the inflation figures were out. Traders are still pricing in two more rate cuts by the end of the year, although by a smaller margin. Suren Thiru, economics director at ICAEW, said: These figures suggest that inflation is in a difficult phase as stronger services sector price pressures helped keep the headline rate frustratingly above the Bank of England’s 2pc target in August. The direction for UK inflation over the rest of this year looks largely locked in, with the boost to demand from a growing economy and higher energy bills in October likely to put inflation on a modest upward trajectory. While the increase in services inflation confirms that it remains a key barrier to keeping the headline rate consistently at or below target, the growing squeeze on wages should help put it on a firmer downward path. An interest rate cut on Thursday is looking unlikely with the majority of the Monetary Policy Committee likely to want to assess the impact of next month’s budget before deciding when to loosen policy again. 07:35 AM BST Pound edges up as inflation holds firm. The value of the pound inched higher after the latest official figures showed inflation remained at 2.2pc in August, slightly above the Bank of England’s 2pc target. Sterling was up 0.1pc against the dollar to $1.317 on the day that the US Federal Reserve is expected to begin cutting interest rates for the first time in four years. Economists think the latest inflation figures indicate the Bank of England will “almost certainly press the pause button on interest rate cuts” at its next meeting on Thursday. Ruth Gregory, deputy chief UK economist at Capital Economics, said: Overall, a pause on interest rate cuts was already expected tomorrow and today’s release cements that view. We continue to assume the next 25 basis point rate interest rate cut will take place in November and that rates will be cut at alternative Bank of England meetings until June. Yael Selfin, chief economist at KPMG UK, added: “Strong services sector inflation likely closes the door on interest rate cut tomorrow.” 07:25 AM BST Holidaymakers hit by 22pc increase in air fares. Air fares rose at the second-fastest pace since records began in 2001, dealing a blow to families during the school summer holidays. The cost of air travel jumped by by 22.2pc between July and August, according to the Office for National Statistics. It said the increase came principally from European routes. Prices last year fell 2.1pc between July and August 2023, which was only the second time that fares had fallen between these months. 07:18 AM BST Years of sky-high inflation have taken their toll, says treasury minister. As inflation remained above the Bank of England’s 2pc targed, Chief Secretary to the Treasury Darren Jones said: Years of sky-high inflation have taken their toll; and prices are still much higher than four years ago. So, while more manageable inflation is welcome, we know that millions of families across Britain are struggling, which is why we are determined to fix the foundations of our economy so we can rebuild Britain and make every part of the country better off. 07:12 AM BST Rising air fares offset by falling petrol prices, says ons. As inflation held at 2.2pc, ONS economist Grant Fitzner said: Inflation held steady in August as various price fluctuations offset each other. The main movements came from air fares, in particular to European destinations, which showed a large monthly rise, following a fall this time last year. This was offset by lower prices at the pump as well as falling costs at restaurants and hotels. Also, the prices of shop bought alcohol fell slightly this month, but rose at the same time last year. Following two months of growth, raw materials prices fell, driven by lower crude oil prices, while the increase in the cost of goods leaving factories slowed again. 07:04 AM BST Inflation remains above 2pc target ahead of interest rate decision. The rate of inflation remained unchanged last month as the consumer prices index stood at 2.2pc, the Office for National Statistics said. Services inflation, which has been closely watched by the Bank of England as it decides whether to cut interest rates, rose from 5.2pc to 5.6pc. CPI rose by 2.2% in the 12 months to August 2024, unchanged from July 2024. Read the release ➡️ https://t.co/3rW4NgMQNJ pic.twitter.com/AvTfVmsj53 — Office for National Statistics (ONS) (@ONS) September 18, 2024 07:01 AM BST Good morning. Thanks for joining me. Inflation has remained stubborn as the the Bank of England prepares to announce its next interest rate decision. The consumer prices index was unchanged in August from 2.2pc in July, according to the Office for National Statistics. It comes ahead of the Bank of England’s next monetary policy meeting on Thursday, where it is expected to hold rates at 5pc. 5 things to start your day 1) Shrinking workforce costing taxpayers £16bn a year | Lost tax revenue from worklessness compounding impact of inflated benefits bill, warn economists 2) Lord Mandelson slams Tory ‘boycott’ of China | The Labour peer said it is time for Britain and China to ‘stop throwing mud’ at one another 3) UK’s biggest supermarket could urge shoppers to replace unhealthy purchases | Tesco risks privacy backlash with proposal to use Clubcard data to influence customers 4) The Guardian in talks to sell The Observer to former BBC News chief | Potential sale comes as newspaper reveals it burned through tens of millions of pounds in cash last year 5) Jeremy Warner: Our ‘iron chancellor’ is set for a humiliating climbdown | Labour has dug itself into the most frightful hole by suggesting it can live within existing fiscal constraints without raising taxes What happened overnight Asian shares were mostly higher as markets prepare for the US Federal Reserve’s first cut to interest rates in more than four years. Japan’s Nikkei 225 gained 0.8pc in morning trading to 36,482.21. Australia’s S&P/ASX 200 stood virtually unchanged at 8,139.30. South Korea’s Kospi added 0.1pc to 8,139.30. The Shanghai Composite index edged up nearly 0.2pc to 2,709.06, while trading was closed in Hong Kong for a national holiday. On Tuesday night, Wall Street ended nearly flat after hitting record highs earlier in the day. The S&P 500 rose to an all-time high at one point in the session, but flattened in afternoon trading and closed only 0.03pc higher at 5,634.58. The Dow Jones Industrial Average fell 0.04pc, to 41,606.18. The tech-heavy Nasdaq Composite bucked the Wall Street trend to close 0.2pc higher at 17,628.06. In the bond market, the yield benchmark 10-year US Treasury notes rose 3.64pc, from 3.62pc late on Monday. Broaden your horizons with award-winning British journalism. Try The Telegraph free for 3 months with unlimited access to our award-winning website, exclusive app, money-saving offers and more. 224 COMMENTS Solar Panels vs. Wind Generators For most U.S. sailors contemplating investing in renewable energy sources for the first time, it makes sense to buy a solar panel before a wind generator. For about $700, you can buy a pair of 60-watt panels that can generate about 240 watt-hours or 20 amp hours (assuming four hours of peak sunlight). This won't cover the amp-hour ... 5 Best Wind Generators For Sailboats (2024) Automaxx. The Automaxx line of wind generators comes in 12v, 24v 48v models, in outputs from 400w up to 1500w. Survival wind speeds are listed at 110mph, but we hope you would never have to put that spec to the test. With very low cut-in speeds of less than 6mph, you will get charging amps on the slightest breeze. 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