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Old 03-20-2018, 01:50 AM
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mfr02
 
Join Date: Jul 2007
Location: Blackpool Lancs, UNITED KINGDOM
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At 100% efficiency, 1HP = 745Watts. A more likely efficiency figure would be around 75% (a bit better with brushless), so 2000W would probably be nearer. Consider gearing to match the motor to the prop, this will increase the possibilities of a workable match. At that size, with present day technology, internal combustion is probably a better bet.
Fuel motors quote power out, electric ones quote power in.
Big heavy lead batteries are not generally good for sustained high output, but are good for ballasting a boat down.
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