Advice given by others are is certainly on point. A story from the other side of the coin. I had an intermittent disconnection of power while hooked to shore power. Initially PI EMS indicated low voltage. Campground maintenance came out and replaced receptacle, which seemed to solve problem. I continued to have problems when hooked to my 50A shore power at home--the EMS was indicating a high frequency. When I called Progressive, they indicated that the EMS was bad and sent out a replacement under warranty.
Moral of the story: while the issue is likely with the campground's power, EMS units can go bad.
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