We have 2 six volt AGM batteries (220 amp hrs) in our truck camper. Also 200 watts solar. I use a VPAP and my wife has a CPAP. We run them both every night with a 300 watt inverter (humidifiers off) We can boondock indefinitely watching a movie every night as long as we don't need to use the furnace and we have sunny days. In cool or cloudy weather we need to be traveling every 3rd day to recharge the batteries. We use a Trimetric to insure the batteries never go below 50%. We don't have a generator and don't want one.