A typical RV rooftop A/C draws 16-18 amps at startup and uses about 13 amps to continuously run the A/C. For example, a 100 Ah lithium battery will power a typical 15,000 BTU RV AC unit for about 30 minutes. If you’re RVing in hot weather, running your AC for 30 minutes likely won’t do much to increase your comfort. However,
if you had a bank of eight 100 Ah batteries, it would run for about four hours. This may be just enough time to beat the heat in the hottest part of the day.
It would be one expensive output to install an inverter and a bank of 8 100Ah lithium batteries to run the A/C without shore or generator power. It seems to me running the generator is a much less expensive route. The generator in my Vegas uses about 1/2 gal of gas per hour. But again, that 16-18 amp draw at A/C startup means you are going to have to shutdown a lot of other 120VAC things when the A/C starts.
But there may be owners out there actually doing this who will pipe in and tell me I'm all wet. I accede to their actual experience.
Here's a link to more information:
https://battlebornbatteries.com/run-...ium-batteries/
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