Randy, that's NOT a 220V AC plug, it's a 30A 120V AC plug, if you do ever get a plug wired for your trailer at home, check the voltage, there's far too many "electricians" that have fried trailers and their electronics inside. I have a Honda 3K, no problem for it to run the air, however bear in mind that if you run the air, the toaster, the coffee pot, the curling iron, all high wattage items, poof there goes the circuit breaker. Your basic 3.5K(3500) will run the A/C and one, maybe two other appliances at the same time. I can run my coffee pot and the microwave at the same time, no trouble, ya just have to pay a bit of attention. Careful of the off brand gennies, hard to find parts for them