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post #78 of Old 05-01-2014
mitiempo
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Re: Repowering with an electric engine?

Quote:
Originally Posted by Stumble View Post
Brian,

While I agree with your sentiment the energy density isn't quite that bad. It is 50lbs of batteries for every 1lb of diesel. Since diesel is about 7.1lbs/gallon it works out to 350lbs of batteries for every gallon.
My 12 gallons = 4200 lbs of batteries if that is the case. And since my 12 gallons are Imperial not US multiply that by 1.25 to get 5250 lbs of batteries for the same range. This on a boat that displaces 7000 lbs.

5250 divided by the weight of golf cart batteries (66 lbs) means I would need 80 batteries to get the range I have with diesel.

Brian
Living aboard in Victoria Harbour
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