Our eight 100 watt AM Solar panels mounted on the roof of our 31' Classic model 30 feed into a TriStar 60 MPPT charge controller and then to the four Lifeline 6Vdc 300-amp hour batteries wired in series and parallel to create 12Vdc and 600 amp-hours of capacity. A Magnum MS2812 can create up to 2800 watts of 120Vac power from the batteries to any 120Vac duplex outlet in the trailer. That will start and run the rear air conditioner but not for a long time.
We had to set a new master circuit breaker panel in the street side storage locker to shed the 120Vac power to the front air-conditioner, the refrigerator and the water heater when not plugged into shore power. This was due to the 30 amp rated contractors in the Magnum MS-2812. Thus the original factory circuit breaker panel became a sub-panel with a 30 amp main breaker.
We also carry two Honda 2,000 watt generators, just in case, as solar does not do very much on overcast days.
The typical Airstream factory installed inverter (600 or 1,000 watt on 2013 and later models) powers perhaps three outlets of all the ones in the trailer - the televisions and one under the dinette in our 2012 25FB International Serenity.
At this point, our off grid camping will be only limited by water storage - fresh and used.
WBCCI Life Member 5123, AIR 70341, 4CU, WD9EMC
TV - 2012 Dodge 2500 4x4 Cummins HO, automatic, Centramatics, Kelderman level ride airbag suspension, bed shell
2014 31' Classic model 30 twin beds, 50 amp service, 900 watt solar system, Centramatics, Dill TPMS, disc brakes, 16" tires & wheels