Light weight DC generator for electric drive. in Gear Anarchy Posted October 13 Are you looking at using the generator to propel the boat (via an electric motor), or to charge the batteries that drive the electric motor? Might be you need less generating capacity than you think if you're just running the battery charger. In any case it might be a good idea to talk to the folks at Electric Yacht, they have some pretty good electric propulsion solutions that might work for you and are pretty responsive in providing advice for specific installations. They can probably recommend a motor solution and also advise on what sort of generating capacity you'd need for continuous operation. As for hydrogen, I'm driving a fuel cell electric car and I'm not sure it's a good solution yet for a boat. The H2 (5 kg capacity) is stored in the car at 10,000 PSI and still takes up a significant amount of space. And I'm not sure where you'd get fuel for a boat.