Originally Posted by ScottC
I turn it on when I’m on board. Leave it off the rest of the time, when it would just be a waste of energy to do otherwise. Mine is only 22 liters, though. Can make scalding hot water within 15 minutes of turning it on.
Need to get us a smaller HWS
Ours is 180 litres household 240v unit and takes over an hour to do and 95% of the time on solar/inverter.
When it dies, it will be replaced with a 50 litre household 240v unit hoping to cut the battery rape x 50% or more.
Out of interest, can you get a couple of quick warm showers and the washing up done on that 22litres?