Full time cruiser friends on two other vessels have 25 litre - 6.6 gal dux 240v household units and reckon they are sufficient and, only take 20 minutes to get to temp..
Will be getting one ourselves to replace the 140 litre - 36 gal Rheem we currently have that sucks around 80amps @ 24v for an hour and a half.
Massive waste of power considering we only use hot water for washing up and hardly any in the shower.
$400 at big hardware stores
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Everything on a boat is broken, you just don't know it yet
Full time cruising is repairing boats in exotic locations
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