FWIW, On my 13.5 Coleman, I put the supp6e in mine and was able to start and run my AC on my 2000 - until it was really hot (outside temp) up to about 3000' (which is 500' less than Wayne's post earlier).
When it's really hot outside, the AC (if it's been off completely) will start, and run for between 10-20 mins before it exceeds the 13.3 that the Eu2000 will put out and overloads.
Without the supp6e, it would have started, at sea level, at 60 degrees outside.
my prior genny was a Yamaha 2400i and it ran a 13.5 coleman with a hard start kit no problem even when it was over 100 degrees outside.
If you want to run your AC in hot weather, it won't do it on just a single eu2000.
