Pretty far down on my wish list, but I just ran across this webpage. They claim to have a 12 volt A/C with upto 7000 BTU.
http://www.cruisencomfortusa.com/
http://www.cruisencomfortusa.com/
Would need a lot of battery power to run that for any amount of timePower consumption: 30 - 46 amps@12 VDC
... or this.LookyLou said:Seems still the bottom line is to be on shore power to run A/C.