[Mikendebbie]

I keep my RV here at the house under a shed and it is always plugged into 50 amp shore power using my Hughes Autoformer. I had the shed and the 50 amp line built a year ago. Walked out back this morning and noticed the Autoformer was RED and showing error E1 and E2. Got my phone to look at the app and it is a line voltage error. My house is evidently being fed 132-133 volt power from my provider (Oncor), and the Autoformer shut down power to the RV for protection. Everything in the house is working fine - but I don't understand what is going on. How does this ever get corrected? How does the incoming line voltage from the power company go up (or down) like that? Do I need to call my power provider and tell them?

I flipped the master breaker switch and the switch to the RV and nothing changed. What do you do when this happens at home or in a campground?