Briansue, I agree with what you have said concerning being protected from electrical power source. It really is hard to believe that RVer's here in Mexico, even when they are witness to the symptoms of what spikes will do, still will not part with the money for a good surge guard. It won't happen to me, it has never happened to me; and there goes another dometic or norcold to the garbage. Oh we have had it for quite a time. they don't get it.
I am located in San Fernando, Mazatlan where the power is off the wall just like any other park here with the possible exception of California which has been closed.
The reason my power stays within 4 volts is because I have a 50/1 Ecowise voltage regulator from Home Depot here in Maz for 7000 peso's.
the trouble with the eco wise is that no where do they explain how it works. Just says what it does; regulate power from 85 to 150 volts etc.
I went to electrical outlets (pun intended) found the sola but not the 4000, everything they showed us was well under. Hardware people told me to go to Home depot for a whole house voltage regulator.
the eco wise has been completely reliable and has supplied a constant voltage plus or minus 4 volts. I have no complaints, just wish it would take 2 hot wires instead of just one.That would allow me to use its full capacity of 50 amps. (2 legs)