We read a lot of articles over the years about unlucky campers who have been in less-than-great campgrounds with poor power. Without going into debate here, we decided we should protect our rig from not only surges, but also bad grounding, reversed polarity, and low voltage. To our knowledge there are basically two manufacturers common in the industry and we chose Progressive Industries. They have external and internal units and we further chose a permanently mounted internal unit. This way it’s always there, it’s always available, it can be controlled from inside the rig, and unless someone wants to break into our rig and take apart our electrical system – it’s theft proof. Our rig is 50Amp capable so we chose the EMS-LCHW50 

LOL, I also chose to install it myself for some unknown reason … I’m no electrician and working with 10 gauge wire is not fun for me. But it worked! Their instructions are very thorough and easy to understand for the layman. You don’t have to be an electrician, just have some common sense and be a little bit handy … and patient.

First, a reference picture of the electrical panel just in case … before hand.

The electrical panel out and the PI unit off to the side … just sitting there waiting for me to cut the big black wire … (yikes, maybe a beer first … maybe two … nahhhhh)

       

The wiring is done! (10 gauge wire is not fun, another beer is in order!)

The finished installation! Everything is tucked up inside the cavity where the electrical panel is and the small controller/display panel fits well just above and to the left. It has a simple single wire that runs to it from the main box.