Generator question

I had a carb issue on my eu2K, pulled it apart and set up on my trailer for a test run. Let them for a couple of hours just to check while I was in the house. AC was running pretty well. One of them ran out of fuel before the other and I didn't catch it. The other one was tripped on OL when I got out there. Put fuel in the empty one and restarted all. Everything came on just fine. You need 2 to run the AC.

My trailer has a pair of 13.5K AC's but there was only 1 running and nothing else.

I have ran a Coleman 13.5AC in an old KZ for an entire weekend on a single EU2K

Chris