I have a ten year old Honda 2000i with a tri fuel carb. With a little help from my Magnum 3000 watt hybrid inverter I can run a Dometic Briskair15000 btu AC, but to reduce the Lock Rotor Amps from 90 down to 10 requires a device called an Easy Start which can be bought from Micro air...about $335.00.
http://www.microair.net/main/products/product.php?id=20
I can actually run the AC on batterie alone but at 100 amps per hour they drain too quickly.
The Honda is quiet and at 48 pounds not too heavy.