My Harbor Freight 2000w Predator will run my A/C at 6,800' since I added the MicroAir Easy Start. It's been 3 years. No problems yet. 300+ hours on the generator. So any 2000w+ should be satisfactory. I made a cable from the twist 30a connector to a standard 115/15a plug using a 10ga extension cord. Much easier to handle vs the heavy 30a power cable with the RV plug. I can also run lights and the TV with my Dish Tailgater using a small inverter. Hope this helps.