And you need a huge battery bank to keep that a/c running after dark.

sure will, as an example, say you have a single 13500BTU unit and you are at Lake Havasu in summer

running the thing continuously overnight for say 10 hours.

from the Dometic 13500 unit datasheet, the power draw is 1320 Watts at a nominal 120V

if we were powering this from a 90% efficient inverter at 12 Volts

then the total wattage draw will be in the order of: 1450 Watts and at 12 V this is approx. 121 Amps.

to run over 10 hours will consume 1450*10 = 14500 Watt/hours

if we had Lithium batteries and we draw to 10% SOC then our Ah requirements are in the order of

1330 Ah !!!! and that's just for one night, if we intended to use this the following night, we have to recharge and that's the hard part.. to recharge with solar in ideal conditions with summer sun at Havasu with 2 axis trackers we need a minimum of 2000 Watts. In less than ideal conditions we need more, for flat panel we need more than 3000 Watts of panels.. that generator is looking mighty good right now... LOL