My 2003 Fleetwood Flair has two a/c units on the roof. The plug for my coach is 30 amp. I read on an ask the rv Doctor question and answer column that with a 30 amp service only one a/c unit should be run at at time when plugged in to shore power. It says it is ok to run both when useing the generator. I noticed after unplugging from an RV site last month one of the blades on the 30 amp plug was dis-colored. I have seen that many times and it is an indication of to much heat or over draw. The a/c units draw 13 amps each. The thermostate manual says when to much amperage is drawn one of the units shed. Should i trust this automatic feature or turn off one unit while using other 110 volt devices? I do not know what the fridge draws when the compressor kicks in but i would assume it would exceed the 30 amp max with both a/c units running. In hot weather the fridge is going to be running allot. If somebody is familiar with the proper way to deal with this situation I would appreciate it.