FWIW,
No personal experience, but have talked to several cruisers with Duogens who were not happy with their
reliability in either
wind or
water modes. You might do some on-line
research on this issue.
We had a home-brew trolling
generator on our last
boat and found it very useful on passages...produced around 10 amps at 6 knots A big PITA to retrieve under way, though.
Cheers,
Jim