There will be a 2 burner Empava induction cooktop which draws 1800 watts @120v, a small Vissani fridge that draws less than 1 amp,split draws less than 8 amps,lighting is negligible, fan on composting toilet. Perhaps a GE Profile heat pump washer/dryer combination unit (11 amps@120v). The water heater is all that is left to figure out.Is anyone aware of a small heat pump water heater? 40 gallon way too big.
Have you considered propane?

I just use his account with his permission of course.
