I have a cord end surge protector that also monitors for low/high voltage open ground and other such potential problems. I have also installed analog meters to measure voltage levels and current coach current consumption.
I have experienced low voltage in the heat of summer that could have effected the conditioner motors, missing legs of two phase power, what should have been two phase power wasn't. The power failures have been relatively rare considering the 102 times I have plugged the coach in somewhere away from home. Call it insurance, reducing hazards, labor of love or just something to lighten the wallet on.
How did you work around 220 VAC 50 Hz power over seas?
2006 Hurricane 31D built on a 2006 Ford F53