A couple of months ago while at Rancho Jurupa Regional Park over Memorial Day we suddenly experienced a voltage drop, and then about 20 minutes later a power outage. As soon as I noticed the drop I shut off my AC units. Power was off for about 5 hours. The next morning a gentleman who was parked diagonally across from my pull through spot came over to talk about the outage. He mentioned he had noticed the voltage drop too and had immediately gone out and plugged in his Power Master V-50 voltage regulator into the pedestal (
http://rvperformanceproducts.com/voltagecontrol.htm). These units will boost the existing low voltage at the pedestal by up to 12% to keep it as close to 120 as possible. It is also a surge protector. Pretty expensive, but less expensive than ruining an entire A/C unit, or other coach appliances. Do any of you carry one of these (or something similar), or have it hardwired into your coach already?