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post #61 of Old 03-02-2014
Maine Sail
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Re: Repowering with an electric engine?

When we discuss battery weight we need to be cognizant of the fact that you will still need a 12V house bank so the 48V propulsion bank may weigh 520 pounds but then the house bank may be another 130 or so pounds making for approx 650 pounds of batteries on a 28 foot boat. If you are real energy conscious you could get away with a single 65 pound house bank.

With diesels we also have fuel capacity weight, which is not very light weight. A 20 gallon tank when full would weigh about 140 pounds +/-.. So 175 pound engine + 140 fuel = 315 pounds.

This makes an 8 cell GC2 bank about 200 pounds heavier not including the weight of the electric motor and gear which can be 100 pounds +/- with wire mounts, motor etc...... So on the O'day 28 it is conceivable the the electric motor conversion ads about 300 +/- pounds over diesel to the boat. If properly placed not a huge deal..

-Maine Sail / CS-36T

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