Our surge protector had a two year warranty which is up. It has been checked and is good. Progressive is the brand. Campground is saying since we got new transfer switch and all has been good it proves it was our rv. Electrician that did repairs to pedestal is telling owner it was our transfer switch. Ours was only RV affected and campground electric is on a loop so if there was a problem others should have been affected. RV service departments are telling us electric caused transfer switch problem. So we have electrician who is licensed and reputable vs rv dealer service depts.