Has my PI unit save me? During one winter when we stayed at home one night. A branch fell from a tree, onto our overhead service breaking the neutral wire. Result, was over 10G electrical damage in the house. The MH was fine when we checked it. PI unit disconnected, when I started the generator up it show shut-down was due to open neutral.
Last winter, after arriving at our winter RV park in late September. Plugged in everything was fine. Power was fine than one night in January, the PI unit was cycling the power off and on. I got up and check the PI monitor it was showing 87 volt with a low voltage code. I shut off the park power and went on batteries, in the morning I got a hold of the park maintenance worker to check out the system. Found a bad branch panel circuit breaker.
You will never know when there will be a problem and you will not always be there to turn off power before something happens, The PI unit is on duty all the time. Did my PI save me? So far, I have not had any damage due to faulty shore power electrical problems. I believe in the PI Units. Gary