I am new to RVing and own a 2012 Itasca Sunstar 30' 30 amp. Soon after I buying our RV, I purchased a 30 amp surge protector and have used it consistently. I have stayed in many private and public campgrounds with no power problems. But recently I was staying at an private campground which I have stayed at three times before. It was warm (85) and was running the AC. Then the microwave started chirping (display light went off and on) and the AC stated flipping off and on. This lasted about 3-5 seconds and then everything returned to normal. I turned off the AC as soon as I could and then waited for a few minutes before I restarted the AC. I didn't have another episode until the next day with a similar pattern. It once happened in the morning without running any AC or heavy electrical devices. I tested the power with a volt meter but it showed between 116-120 volts. I could never capture the voltage reading during one of these episodes though. The surge protector never tripped during these conditions. I even took the RV into a dealer and had them check over my 120v systems and they ran the AC for four hours without incident. I then asked for a different site which had both 50 and 30 amp power but I still had these once a day problems.
My question is - was I experiencing a low voltage condition that was not low enough to trip the surge protector? What are the symptoms of a low voltage condition?
What else could I do to protect my RV from electrical issues?