I never bothered to recharge my marginally functional AC system after an engine rebuild in 2004, and removed most of the plumbing components shortly afterward, but for the compressor which was needed as a pulley.
I have since replaced that AC compressor with a second alternator which can make ~50 amps at idle.
A 12000 btu 12/24 volt DC AC unit from this outfit can draw as little as 32 amps at 12 volts:
https://bcoolaircon.com/Still a lot of battery power required for powering it with engine off, but it is about 50% more efficient than Using an inverter to power a 120Vac window shaker or a portable unit which are even less efficient.
Living near pacific ocean, I'm all about ventilation. I have enough powerful intake and exhaust fans to exchange the complete volume of interior air, with outside air 2 to 3 times per minute if I crank them up that high, which I do not need to do.
So I can keep interior from getting hotter than ambient at a fraction of their available power, and purge dog farts in a fraction of a minute, when needed.
But compressor based, engine off AirConditioner, is almost still the golden unicorn.
It can be done with enough solar wattage/ alternator wattage, and battery, but the batteries are gonna be worked hard, and good insulation and efficient components are still needed to pull it off in hot and humid ambient temps.
I think a window shaker, hidden behind spare tire, powered by inverter/Grid might be in my future when I no longer live In coastal sandy eggo.
Someone with more determination to pull it off found a window shaker which would settle around 430 watts after starting up( still needed an 1800 watt inverter to handle start up surge), and had 800 amp hours of Lead acid battery capacity and 800 watts of solar, and could live in the desert without having to run a generator/ alternator in winter fall or spring, not summer..
I know of one person with teh Bcool unit linked above capable of doing it with 500 amp hours of lithium, but for how long he can go with only 300 watts of portable solar panels and no alternator contribution has not yet been reported.
Compressor based AirCond is highly energy intensive and will remain so.