Quote:
Originally Posted by Ski in NC
Electric water heat from a gennie is not efficient. A good diesel is about 40% efficient at converting fuel energy into electrical energy. A little boat gennie is probably around 25%. So only 25% of the energy in the diesel makes it into heat in the tank...
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If you already run the genset to recharge batteries, or the eutectic fridge/freezer, or to cook, as many do, it can heat water at no or little extra fuel use or genset hours.