We were camping in Minnesota a few years ago and our Progressive unit shut down. I checked the error code and it was due to low voltage. That evening TV news was advising that any of Minnesota’s electric companies were having low voltage problems because of aging electrical grides and the inability to obtain right of way to replace or upgrade their existing grides. Although low voltage will not “blow” out many RV electronic systems extended period of low voltage will burn out AC compressors.
We were camping at a brand new campground and our Progressive unit would not connect as it registered reverse polarity in the pedestal.
The advantage of a hardwired unit is that you can’t plug in without protection.
Progressive units are the only such product with a lifetime warranty and the best customer service record on this forum.
Dave