We have 220 amp battery power also. With the conversion of just some of our lights to LED, we can dry camp easily for up to 5 days. But that is spending most of our time outside (which we prefer) and using the lights and other indoor appliances sparingly. We don't have a generator and don't want one. When I get to the point of needing to recharge the batteries, it's time for us to visit a full hookup site to charge the batteries, dump the tanks, refill the water, do some laundry, visit the grocery store, and take a long shower at the park.