I bought a tRC Surge Guard surge protector 50 amp. I recently plugged into a newly installed 50 amp source. I plugged in and everything checked out okay after the 128 second cycle. When I hooked the camper I got a "RV Power Off" prompt and no power to the camper. I got the same message a couple weeks ago so I plugged in direct. Everything worked fine and voltage was centered on the volt meter inside. However when I did that the last time the inside meter pegged out on the high side.