Of course I want the best system for the least amount of money.
I was thinking of going with a 3000 watt pure sine inverter they tend to be on the expensive side. That said We do not do a lot of winter camping but I wanted to build the solar system with that option open and reduce the consumption of propane and the need to frequently refill the tanks.
The heater has 3 settings with the lowest setting being under 600 watts.
Typically when we do use a heater it's during the day at night we switch to furnace which keep a things from freezing.