I agree with TurnerFam. For the first 30 years of camping I never used any sort of device at the pole other than the plug from my camper. In those thirty years I stayed in some really run down places and many Thousand Trails locations known for 'poor' power. I never had an issue. When I retired and bought my current rig, I had excess cash so I bought a Progressive Industries device. In the last year of use two times the EMS50 has thrown a code requiring replacement of the unit. Now PI has been great to work with and their lifetime warranty is outstanding but I do wonder. In the 30 years with no 'protection' zero issues, in the one year with protection 2 issues.
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Lt Keefer
2018 Hurricane 29M
CHF, Saf-T-Plus, SumoSprings
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