Just a quick note-- you can run a Honda Companion independently. It has a 120 and 30 amp plug in. However, the Companion independently still only is rated at 2000 so you couldn't run the AC alone with it. Fwiw, you can probably find 2 used Honda 2000's for about the same price or even less than a new 3000. I just picked up a 'like new' 2000 Companion w/ parallel cables for $650.