Ditto, Bobbo & PenMan!
IMO, a few hundred dollars for a PI EMS is good insurance and peace-of mind against many, many thousands of dollars of potential damage from inferior power. Can't imagine the drama of being on the road thousands of miles from home only to have a catastrophic failure of your entire electrical system (converter, inverter, A/C, frig, TV, satellite, etc.) due to an unplanned/forced stop at a Mom & Pop RV park who wired pedestals on the cheap. Even if your TT/motorhome insurance covered the damage, who wants to go through the downtime and inconvenience of ripping your entire "home" apart to effect the repair. Checked power with a voltmeter prior to plugging in? What about 5 seconds later? Or, during the night while you're sleeping? Like most insurance (policies), most never need it, but if you do, wow, it can be darn near priceless to have.
