I have had my boat out of a marina (hooray!) since April, and plan to keep her on a midriver pontoon in the Hamble as long as the harbormasters continue to be so accomodating.
Since there's no power on the midriver pontoons, this creates a problem of how to keep the batteries up when I'm not on the boat (for up to a month at a time).
I had pretty much decided on a Rutland
914i for this purpose -- quieter than other wind
generators, reasonable cost, produces some power from 5 knots of wind
. It produces 140 watts in 20 knots of wind.
But I have noticed that in the specs it says that it is suitable for battery
banks up to 260 amp-hours (presumable at 12v). I have 440amp-hours of battery
power at 24v, equivalent to 880amp-hours at 12v.
Will this wind generator
simply produce too little power to do anything for my batteries? I don't really care about powering my systems while I'm on the boat -- I have a nearly silent 6.5kW diesel
genset which takes care of my power needs nicely when I'm on board. I am just trying to keep the batteries topped off while I'm off the boat, to keep them from going off and getting sulphated (like my present battery bank did).
What say you?