Power WatchdogRSP-50-PWD-EPO, Replacement Surge Protection for 50 Amp EPO

The Hughes Autoformers RSP-50-PWD-EPO Replacement Surge Protection Module for 50 Amp Power Watchdog EPO is a must-have backup for my RV camping setup! Designed specifically for the 50A Power Watchdog with Emergency Power Off (PWD50-EPO and PWD50-EPO-H models), this plug-and-play module delivers 6,120 joules of advanced surge protection, with a max spike current of 180,000 amps across 18 MOVs—among the highest ratings available. When my original surge module was fried after a campground power spike, swapping it out was a breeze; it took less than 5 minutes with just a Phillips screwdriver, no soldering or wiring needed. The module’s compact design fits perfectly, restoring full surge protection instantly.The included instruction card made the process foolproof, and I was back to monitoring voltage, amperage, and wattage via the Power Watchdog’s Bluetooth app without missing a beat. The EPO functionality continued flawlessly, auto-shutting power if voltage drops below 104V or exceeds 132V, protecting my RV’s electronics. I love that Hughes offers one free replacement within two years (with proof of purchase), but having a spare (around $60–$80) on hand ensures no downtime, especially as a full-time RVer. My only minor note is to double-check your model (this won’t fit non-EPO PWD50 units), but the clear labeling avoids confusion. Compared to replacing an entire surge protector, this module is a cost-effective, high-quality solution. For RVers prioritizing reliable power protection, this is an essential spare! Highly recommend!

So simple to install! We love this surge protector, and this has added a lot of peace of mind. We purchased a new RV, and on our very first trip out with it, the campground had experienced a surge, and the Watchdog did its job. This worked great on our last trip this weekend, and we recommend keeping a couple of spare ones on hand in the event you need them.

Bought for it back up

Good replacement to have on hand in camper, in case a power surge does happen and takes out the board in the Power Watchdog. One reason we got this protector was the board is user repairable. So far have not had any need to replace it although the Watchdog has worked to protect us a few times. Good peace of mind while camping.

If you have the 50amp Hughes device you probably should buy this as a spare. This way you will be able to change out the protection board and continue to have power without having to wait on a replacement to arrive after an event that burns out your original one. Just like having a spare tire is a good analogy here.

After the first module seemed to be ised up rather quickly after one season i called cust service and they sent another to replace. Easy install i always keep a backup module in the camper now though.

Super easy to install. Took about 5 minutes total

Bought as a spare so haven’t used it, but it’s packaged well for storage.