Around the first of the year, i really began reviewing the different surge/ems systems on the market. When the name of one particular manufacturer keeps coming up, there is a reason. About the same time, I took a look at the cost of just a few of the electrical/electronic control systems on my coach, and quickly concluded that having a good ems system was a little like having insurance.
Also, considering that a number of campgrounds dont always have the most experienced electricians doing their work, and (especially for a 50 amp rv) that all it takes is one campground pedestal with an open neutral, or one guy who takes a quick look at a 30 amp receptacle and thinks its for 220 vac, and then lots of your rv components get smoked.
Then your rv gets to live outside at your favorite dealer waiting on insurance approval and parts for six months....ugh
So,...having said all that, i bit the bullet and ordered a Progressive Industries HW50C and permanently wired it in. It came with a remote display and its always looking at line voltage, amperage draw, frequency, and status. If there is a power failure, it will start a timer that allows the air conditioner compressor to equalize pressures before turning power back on. An open neutral for a 50 amp rv virtually guarantees failures on a large scale, but the PI u it will recognize that and shut power off until its corrected.
So, the PI unit began looking like more of a bargain when considering all it does. I think they shoukd be standard equipment on 50 amp systems, or at least an option. Although, I would prefer to install and wire it myself.
Good luck whatever you decide, but i highly reccommend the PI unit.
2016 Ford F-350 Lariat CC, 4x4 SRW. B&W turnover with extender. 2015 CC Silverback 29RE, fitted with Reese Goose Box. Amateur Extra Class K5TS, 2016 nights camped 16