ok, this is a topic I've spent a lot of time messing with. living in south Louisiana is brutal and with temps near 100 in the summer coupled with 100% humidity...ac units are a big deal...
I recently had to add some cooling to a strip mall I have and so I went with a mini-split and did the install myself. I learned a good bit and saw that the mini-split units take AC and invert it to DC. by using DC instead of AC, the compressor can operate at variable speeds staying slow and ramping up as needed versus the compressor being either off and then immediately started up under load requiring a huge spike of current and the aid of a starting capacitor when using AC. then I also saw that smaller window units are also being made with DC compressors now. thinking about air conditioning units operating off of DC immediately made me think of being able to use them camping/off grid. I was looking at ways to modify one for use in my camp trailer and then I noticed that a couple companies have just designed air conditioning units for RVs that run off DC. there is a rooftop model and a mini-split version where the air handler and evaporator coils are inside and the condenser unit is outside, eliminating the need to duct the hot air outside like portable ac units require.
DC units will pull some amps to make up for the lower voltage, BUT 24v units are available and can be used off batteries.
here is one brand that seems to be pretty good. there are others online and I'm sure there are even cheaper versions on Temu and such sites. its just really cool that there are DC powered air conditioners out there that are legit and work very well. you would need a large battery bank to run one of these a long time, but you can run an inverter and still use these units with campground shore power or a generator and save the battery
Download User Manual This super-efficient DC-powered rooftop air conditioner is designed from the ground up to maximize the comfort of your outdoor adventure. With the DC-powered twin-cylinder rotor compressor, Velit 2000R draws as low as 20A (at 12V) and is able to deliver fresh cool air to you...
velitcamping.com