..2 gph is 1/5 gal per hour.

Even so, given the amount of energy produced
I'm still not convinced it is more efficient than a
diesel genset.

What intrigues me, is the quiet productin of power
and hot water.

BTW, I was trying to find out about the Aquanami
kinetic energy generators. They have near frictionless
solutions for inducing electric current by sliding
magnets. You may hve seen their flashlights.
I'm very curious to see what they can produce. Perhaps
enough to make up for internal resistance losses in
batteries for boat stored in the water.

DSK wrote:
At 800 watts for 1/2 gph, it's not very energy efficient.
You could do better than that with a 125 amp alternator and
your main engine just a click above idle. The quiet part is
really nice though.