From our experience, with 30 amp we can run only ONE AC. Plus we can use coffee maker, toaster, TV's etc. if we need to run the microwave or run the hair dryer, we turn AC off for a few minutes until done. We do this because while camping at an older park one time with only 30 amp I tripped the breaker when I tried to use the microwave and AC was on. Nothing else was on at the time. It wouldn't have been a big deal but the breaker was not on the pedestal, it was inside the office building which was behind our site and the office was closed already. We had to track down manager (it wasn't too hard...he is related to us) to reset. He told us that is the only site without breakers on the panel. It wasn't too big of a deal but a little inconvenient for all involved so we learned to just be cautious and turn AC off before using another high powered appliance again if on 30 amp.