I started with a PT50C 8 years ago and bought another one to use as a spare after I asked myself what would protect me if the primary unit had to go back for service. During the years both sacrificed themselves for my rig and were both replaced with the PT50X which I have and use every day now. And I still have two of them so I always have a spare to use if/when the primary one dies in service to me.
I will absolutely NEVER plug anywhere anytime without my PT50X including my home base where I have been protected from a failed power company transformer that was putting out 132v+ and another time a high voltage spike every morning about 5:00am.
You aren't safe anywhere without your PT50X.
Ed
KM4STL
2006 GMC 2500HD CCSB 4x4 Duramax/Allison, Titan 52 gallon fuel tank, Prodigy Controller, B&W Companion Hitch, Progressive Industries EMS-PT50C, TST Systems 507 TPMS
2010 Jayco Designer 35RLTS,Cummins/Onan RV QG 5500 EVAP
Fulltime since 2010