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Old 24-03-2014, 08:36   #1
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Join Date: May 2011
Location: Cambridge Ontario Canada
Boat: Dufour 12000CT Ketch - 45'
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Hydro generator DIY

Does anyone know where I might find some DIY plans or ideas for a hydro generator that could tow behind our sailboat or attach to our transom. I can't believe the price that company's want for an off the shelf unit $4-6,000, really?
Has anyone had any luck modifying a trolling motor? Any ideas, suggestions, comments welcome... Cheers.

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Old 24-03-2014, 08:46   #2
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Re: Hydro generator DIY

Have a look at slow DIY electric generating windmills. Several designs for slow speed generators , of course you have to make the whole thing survive the salt !


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Old 24-03-2014, 09:01   #3
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Re: Hydro generator DIY

... you will find 'homebrew' or low-budget versions on the net. For instance this one: sailnsea MyEsell.Com - Schleppgenerator :: SailingGen

After I compared several units I will go with the newer Watt&Sea model - your mileage may vary ;-)


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Old 24-03-2014, 09:02   #4
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Location: Sacramento, California
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Re: Hydro generator DIY

I'd think it would be harder to engineer a tow-behind unit, with the motor in the water.
Might be easier to use an outboard drive leg that mounts firmly to the boat,
and have an alternator on top, out of the water.
This would lead to the idea of a tow-behind boat.
I just picked up an old standup jetski for free, strip it down to just the jet drive and minimal hull and attach an alternator to the shaft.
MiniMPPT Solar Controller
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Old 24-03-2014, 09:10   #5

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Location: SF Bay Area; Former Annapolis and MA Liveaboard.
Boat: Looking and saving for my next...mid-atlantic coast
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Re: Hydro generator DIY

Or something like this:

Ampair Wind, Hydro and Packaged Power specialists +44 (0) 1258 837 266 | Aquair 100
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DIY, generator, hydrovane, Power generation

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