I’m struggling to find an all-electric tankless water heater for my RV. We always stay at campgrounds so I’d rather not have to use propane if not needed.
Bill is right on. It’s just not possible, especially if you have a 30a RV. Even with a 50a RV it’s almost always NOT going to work. If you must go electric, see if your current water heater has an electric mode or replace it with an electric tank water heater.