Hi Tim,
Towed impeller generators do not acheive significant charge rates. The amps looks good because they are only doing 12V. In reality, a hydrogenerator of any sort struggles to generate a consistant 100W at 6kts. Check their literature and do the math. If all you want to do is collect enough to cover your house loads, regen and towed generators are fine, charging your traction bank is a differnt problem.
With most of our converted displacement auxiliary sailboats around 30', a consistant 6 knots only shows up on a good day, most of my days are spent around 5 knots or less, that means that the regen will be significantly less than the 100W listed above. How fast do you usually sail your boat?
Fair winds,
Eric
Marina del Rey, CA
--- In electricboats@yahoogroups.com, "Tim" <haywardt@...> wrote:
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> I am curious as to why it is so challenging to achieve good regen rates when towed impeller generators produce such high charge rates. I would think the placement and size of the prop would produce better results than a towed generator. Is it a problem with the controller? Have you tried sailing with the throttle slightly in reverse?
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