We added 2 additional house batteries to extend running time for the residential fridge and electronics. Even with 2 more batteries, you will not be able to run the AC on batteries since the AC units are not on the circuit that the inverter provides power to. Even if you did, you would need a lot of batteries just to start the AC unit(s) and it would be brutal on them.
Another option is to consider solar panels to keep your batteries charged during the day and ready for overnight. We added 400 watts of solar and it makes a huge difference when off the grid. But we still need to run the generator for AC, the solar charging can't keep up.
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John
2016 Thor Hurricane 35C with pups Piper and Annabelle
2013 Ford Fiesta toad
FMCA - F457085
Blog - https://traversity.us
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