[grill-n-go]

Agree with Bob, dry camping in cooler weather, we go the Buddy heater route, have a rechargeable lantern that lasts several nights together with a dual fuel lantern for the outdoors. Battery only gets used by Thetford or the water pump. At this rate you can go for several days. If you want more amenities like radio, television, microwave, hairdryer etc then you want to think about solar and/or a generator.