There is a romance to the idea. You sit in a quiet bay off the Crozon peninsula, the breeze hums in the rig, and a little turbine spins away making your electricity for free while you do nothing. I bought into that romance and fitted one. Whether it earned its keep is a more complicated story, and one I think every visiting cruiser should hear before spending the money.
Let me deal with the romance and the reality separately, because they pull in different directions.
What a wind generator actually makes
The honest output curve is humbler than the badge suggests, and it is cubed. Wind power rises with the cube of wind speed, which means the difference between a gentle breeze and a fresh one is enormous.
Take a popular 400-watt marine turbine as the benchmark. In about 6 knots of wind it makes roughly 25 watts, which is around 2 amps on a 12-volt system. That is almost nothing. At 20 knots the same turbine produces about 10 amps, which is real, useful power. To get there you need 20 knots blowing across the anchorage, and you need it for hours.
So the whole case for a wind generator rests on a single question: how often does the wind actually blow hard where you anchor? In a sheltered French summer bay chosen precisely because it is calm, the answer is often "not much". You picked that anchorage to escape the wind, and the turbine sulks accordingly.
The honest French-summer problem
Here is the awkward truth for a Mediterranean or fair-weather cruiser. The conditions that make a wind generator productive are the conditions you are trying to avoid. A Cote d'Azur summer is largely light air punctuated by the mistral, and when the mistral does arrive you are usually tucked into shelter where the turbine sees little of it. The Atlantic coast is windier on average, so a Brittany cruiser gets more out of one, but even there the calm settled spells that make anchoring pleasant are the spells when the turbine idles.
This is why most experienced cruisers I respect treat wind as the junior partner to solar in southern Europe. Solar makes its best power on exactly the still, sunny days when the wind gives you nothing, and the two cover each other's weaknesses if you fit both. I sized a solar-first system in my guide to solar panels for cruising France, and that is where I would start before adding any turbine.
Noise, and your neighbours
The old criticism of wind generators was the howl. A cheap turbine in a blow can sound like a small aircraft trying to take off, and in a packed anchorage it makes you the most unpopular boat in the bay. Modern blades are far better. The quietest 400-watt units now claim something like 70 per cent less noise than older designs and are marketed specifically for use in marinas and calm anchorages.
Still, no turbine is silent in 25 knots, and the vibration carries down the mounting pole into the hull where you feel it in your bunk. If you anchor in busy summer spots off the Lerins or in the Morbihan, factor noise into the decision. Solar never wakes anyone.
What it costs in 2026
This is where the case gets harder. A quality 400-watt marine wind generator with its hybrid charge controller sits around 1,900 to 1,950 euros in 2026. Add the mounting pole or arch, the cabling and the install, and you are comfortably past 2,000 euros for a single source that only performs in strong wind.
Compare that with solar. For broadly similar money you can fit several hundred watts of panel that makes power every sunny day, silently, with no moving parts to wear out. For most French cruising the panels win on every metric except one: they make nothing at night, and that is the single genuine argument for wind.
Mounting, and the safety angle
If you do fit one, the mounting is not an afterthought. A wind generator wants clean air, which means high on a dedicated pole aft or on the radar arch, well clear of the bimini and the heads of anyone in the cockpit. The blades on a 400-watt turbine spin fast and have hurt people, so the pole height is a safety dimension, not just an efficiency one. Most installs put the blade disc well above standing head height for exactly that reason.
You also need a way to stop it. In a real blow a turbine can overspeed, and you want either an electrical brake on the controller or a way to tie the blades off so they do not run away when you are trying to sleep through a gale at anchor. Factor that into the choice: a unit with a proper brake on its hybrid controller is worth more than its raw output suggests, because the day you most want to shut it down is the day it is making the most noise and vibration. The same overnight loads that make you want that backstop are the ones I tallied in power management on a French coastal passage, and they are what any charging source ultimately has to feed.
When a wind generator does earn its place
I am not telling you never to fit one. There are real cases where it pays.
- You cruise the windy coasts and shoulder seasons. If your French season is Brittany and Biscay in spring and autumn rather than the Med in August, you will see the 15-to-25-knot anchorage winds that turbines feed on. Pair it with solar and lithium for a French summer cruise and the two sources rarely both fail.
- You sit at anchor for long stretches in unsettled weather. A turbine makes power through the night and through grey, blowy days when panels sulk. That round-the-clock trickle is genuinely useful if your loads run all night.
- You are heading offshore beyond France. On a passage or an ocean crossing the apparent wind is constant and a turbine becomes a serious contributor, which changes the sums entirely. If France is a stepping stone, that tilts the case.
The deciding factor is almost always your battery bank's ability to soak up an irregular, weather-dependent trickle. That points straight at lithium, which accepts charge fast and at any state, where AGM wastes the gusts. I laid out the chemistry choice in lithium vs agm boat batteries for a French summer.
There is one more case I rarely see mentioned: the cruiser who keeps the boat in France over winter on a swinging mooring or a quiet berth, away from shore power. A turbine that makes 2 amps in a light breeze sounds useless in summer, but across a windy French winter it can quietly keep a bilge pump's battery topped and a small dehumidifier or anti-damp trickle running when there is no sun to speak of and nobody aboard. For that unglamorous role, the very weakness of the turbine in calm summer air becomes a strength in the long grey months, and a solar-only boat left for the winter often comes back to a flatter bank than expected.
My verdict
If I were rigging a boat for a single French summer of Mediterranean and fair-weather anchoring, I would not fit a wind generator. I would spend the money on more solar and a bigger lithium bank and never miss the turbine, because the still bright days that define that cruising are the days a turbine does nothing.
If I were cruising the Atlantic coast hard, staying out in unsettled weather, or using France as the springboard for something longer, I would fit one as the night-and-grey-weather backstop to a solar-first system. That is the combination that genuinely never lets you down.
The romance, sadly, is just romance. The turbine off Crozon spun beautifully for the photographs and made very little until the day a near-gale came through and everyone else fled to harbour. That, I eventually understood, was the only day it was ever going to earn its keep.
