I dunno... My gen switch has dual watt gauges because it runs on two 4 switch circuits and the circuit that was running just the tv/entertainment center, and the kitchen fridge was at around 1000w when it was all running. The other circuit was running the garage fridge, computer, fish tank, and some other low watt lines and it was pulling around 400 watts when everything was running..
I've not run my trailers AC unit for that long on the gen alone, so can't really say one way or the other.. Just from what I saw my gen switch saying it was drawing. I did have it on eco mode during that time too, so just dunno.. ;)
Mitch