Hi sloop_wasnt_me,
Just answering your regen question, I'll reference some of my previous posts on this forum. You can check post #16405 from 11/24/2010 ans post #16453 from 11/29/2010.
The short version is that with a 27' boat, you shouldn't count on any regen to cover anything above and beyond normal 12V house loads. Regen will not put a noticable amount of charge back into your traction batteries on anything less than a multi-day passage.
Fair winds,
Eric
Marina del Rey, CA
--- In electricboats@yahoogroups.com, "sloop_wasnt_me" <sloop_wasnt_me@...> wrote:
>
> I have a Cal 2-27, 7600lbs displacement and I am considering the same setup: Mars 3001 and Kelly 72301 controller but I will use chain drive. I will not be replacing my Atomic 4... I will leave it in place for when the batts are down. I plan to mount the electric motor over the prop shaft facing forward. I will split a flange and sprocket and put it together around the prop shaft rather than remove the engine and slide it onto the shaft. Since I just bought two group 27 deep cycle batts for house and engine starting, I will for now just buy 4 more of the same for about 100 amp/hours at 72VDC. I may add another bank later of the same, or just double up parallel for 200 a/h capacity.
>
> Did you try a higher reduction, say 2-1/2 to 1? I am thinking I might want my motor topping out at about 3600 RPM and so I was considering 3/1 or so. Of course it is trivial to change the sprocket on the motor so I can always adjust the ratio.
>
> Your cat is similar size maybe slightly lighter than my cal. What kind of battery consumption are you getting? typical range at your favorite cruising speed? And how well does the regen mode work? Thanks for any answers, tips, or advice.
>
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