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  1. RV Surge Protectors
  2. Hughes Autoformers
  3. 50 Amp
  4. Surge Protector
  5. Bluetooth
  6. Emergency Shut Down
Portable Power Watchdog Surge Protector with Bluetooth and Emergency Shut Down - 50 Amp

Portable Power Watchdog Surge Protector with Bluetooth and Emergency Shut Down - 50 Amp

Item # HU87FR
Our Price: $291.62
You Save: $57.38
RV Surge Protectors
Shipping Weight: 7 lbs
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Keep your RV safe from damage caused by voltage spikes and sustained low voltage. Disconnects power when voltage is low to keep your appliances safe. Downloadable app lets you monitor the connection and diagnose problems from your smartphone. Great Prices for the best rv surge protectors from Hughes Autoformers. Portable Power Watchdog Surge Protector with Bluetooth and Emergency Shut Down - 50 Amp part number HU87FR can be ordered online at or call 1-800-940-8924 for expert service.
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Hughes Autoformers RV Surge Protectors - HU87FR

  • 50 Amp
  • Surge Protector
  • Bluetooth
  • Emergency Shut Down
  • Hughes Autoformers
  • Portable
  • 6100 Joules

Keep your RV safe from damage caused by voltage spikes and sustained low voltage. Disconnects power when voltage is low to keep your appliances safe. Downloadable app lets you monitor the connection and diagnose problems from your smartphone.


  • 50-Amp surge protector prevents damage to your RV from power spikes and sustained high or low voltage
  • 4-Second start-up delay gets you up and running faster than other brands
    • Delay makes sure power is safe to use before flowing normally
    • Audible click tells you the surge protector is on
  • Surge protection module offers 6,100 joules of protection in case of lightning strike
    • Can be replaced once it wears out - no need to replace the entire unit
  • Emergency Power Off cuts connection in the event of an error to protect electronics and appliances
    • Shuts down if current drops below 104V or raises above 132V
    • Also cuts power for an open ground, open neutral, reverse polarity, open circuit, or mis-wired connections
    • Automatically turns back on once power is stable for 90 seconds
  • Free Smartphone app for iOS and Android connects via Bluetooth to monitor your system
    • Quickly pair using the QR code on front of device
    • Read volts, amps, and watts in real time to keep an eye on your power draw
    • Get push notification when voltage is outside of acceptable, customizable ranges
  • Easy-to-see indicators show you if there's a problem and what that problem is
    • Watchdog logo illuminates white if power is steady and red if there's an error
    • Error code can be compared to legend on the side of the unit
  • Housing is IP65 rated for protection against dust and rain
  • Metal bracket around cord provides secure place to attach cable lock
  • Easy to use - plug into pedestal to check for a safe circuit and then connect your RV shore power cord
    • Compatible with power cord adapters
  • ETL listed


  • Surge Protector dimensions: 5-1/2" long x 4" wide x 9" tall
  • Cord length:
    • Input: 10"
    • Output: 9"
  • Amps: 50 amps
  • Energy dissipation: 6,100 joules
  • Limited lifetime warranty

Protect your investment

If you aren't using a surge protector, you're taking a big risk. While spikes caused by lightning can damage your electrical system and appliances, there are common electrical issues that can be just as dangerous. Choosing a surge protector with advanced features will help you protect your RV.

Smart Surge Protection

Electrical problems are not uncommon at campgrounds, especially ones where wiring was originally installed decades ago. When a campground is full on a hot day and everyone is running their air conditioners, low voltage may cause a brown-out situation and damage your RV appliances. On the flip side, faulty transmission, bad wiring, or spikes caused by other RVers connecting to a shared line can all lead to voltage issues that may not be significant enough to trip a basic surge protector.

Power Watchdog surge protectors with Emergency Power Off are equipped with computers that monitor voltage and disconnect when voltage is at risky levels. Plus, they automatically reconnect power when power returns to normal. This keeps your RV safe from problems caused by low voltage like motors overheating in fans and air conditioners.

In the event of a major spike, you can replace the surge protection module itself rather than the entire unit. The modules are plugged in without soldering, so you don't need to be an expert electrician to make an easy repair. In fact, the only tool you need is a screwdriver.

Information at Hand

The Power WatchDog smartphone app

The Power Watchdog app lets you connect to your surge protector via Bluetooth. You can monitor your energy usage, making it easy to diagnose any ongoing energy issues you may be experiencing. When voltage increases or decreases to risky levels, you will be notified right away. You can also reset your surge protector without stepping outside.

PWD50EPO Power Watchdog Surge Protector with Bluetooth and Emergency Shut-Off - 50 Amp - Portable - EMS

Replaces PWD50-EPO

Installation Details HU87FR Installation instructionsAlternate Instructions HU87FR Installation instructions

Customer Satisfaction Score:

Customer Reviews

Portable Power Watchdog Surge Protector with Bluetooth and Emergency Shut Down - 50 Amp - HU87FR

Average Customer Rating:  4.8 out of 5 stars   (882 Customer Reviews)

Keep your RV safe from damage caused by voltage spikes and sustained low voltage. Disconnects power when voltage is low to keep your appliances safe. Downloadable app lets you monitor the connection and diagnose problems from your smartphone.


Just received and put in use. It was as advertised. The app was easy to setup and use. The box the unit came in is designed to also be used to stow and transport the unit, which is a nice bonus!

I look forward to great service from this unit while providing electrical protection for my 5th wheel RV!



Ive owned and used this surge protector for a year now. I have been extremely pleased with this product. It works as advertised. I have found the bluetooth information excellent and use the free app to monitor power levels. The app has been helpful for me to understand what branches of my RV 50-amp are tied to which leg of the service. This has helped me understand a good AC startup sequence. While parked at home I leave my power plugged in, I can monitor how much power my RV is using while it is in parked mode. I would HIGHLY recommend this accessory as a MUST HAVE for your RV!


The Power Watchdog Surge Protector with Emergency Shutdown, did it job with I lost my neutral conductor on the incoming service for the power company. Took me a bit to figure out what was happening. It was showing an overvolt on one 120V leg and an undervolt on the other 120V leg. It would shutdown the power, and then the voltage would go back to normal. But as soon as I turn on anything that was 120V it shut off the power. Power company fixed their issue the next day and it started working normally. Would not hookup to shore power (home or away) without it.


Been using even at home every day. No issues. Glad I have the protection





My Hughes Watchdog continues to work great. I love that:
(a) It goes beyond most surge protectors with line voltage monitoring and shutdown, to better protect my RV's electronics.
(b) The Bluetooth connection and app, so I can monitor electric loads plus see total power used.


This product saved our toyhauler from going up in smoke ! While Glamping at our friends ranch in Colorado in June of '22 , Lightning struck their main power pole supplying power to the 40 acer property . Our RV was about an eighth of a mile from from the pole . The BOOM and SIZZLE sounds were like none other ! Scared the shizzle out of us ! After the power company restored the service , hit the breaker and the power was back on , no issues . Thank You to our Watchdog !


Great product & competitive with [online]. Received product on scheduled delivery date. Bought it to replace my 7 yrs old surge protector . Like the fact that not only it protects from surge , it also protects from low voltage from RV park. Auto power shutdown ,Bluetooth compatible & able to see exactly whats going on with park power via phone app. Also like the fact that in event of major power surge the circuit board is owner replaceable vs sending it in for repair .



After 4 months stay @ RV park on Texas. Gulf coast unit performed as expected . Zero issues connecting to bluetooth app on phone. Liked the fact that a could get KW hrs per month via phone app. Great device


Easy to use. Love the fact you can replace the surge module. I bought an extra to have on hand (about $40). The surge protector being replaced by the Watchdog was a one and done. It was fried and no way to replace a module. Used a little over a year, so $300+ dollars down the drain.


Peace of mind. Used for several months in past 18 months since we travel for periods of time. Easy to read display. The 50 amp can be used when plugged to 30 amp as well, so no need to buy two. Internal parts can be replaced if compromised by surge which is better than finding a new one.


This appears to be a robust surge and voltage protector. The customer service at eTrailer was super, as always. The Power Watchdog worked great when I connected it.



Still working great after a year. Peace of mind at the campground.


It has worked flawlessly and the Bluetooth connection has made it easy to use.



Works great without a hitch! Glad I purchased it and like the ease in checking amperage per leg using app.


I haven't used this product yet. I bought it based on the reviews of others, its capabilities and features, and the reputation of the manufacturer.

I like that the surge module is user serviceable and can be replaced. I also like that the Bluetooth app will let me know what's going on with my power systems.

Physically it's heavy duty and built for the job. I don't like the idea that it's so bright and bought the shade from the manufacturer's website.
Until they include it in the kit (why don't they?) It would be a good idea for etrailer to offer the shade right as you are buying it because most people don't realize it's an option. I haven't seen it on any resellers site, yet. There are too many people who complain about light pollution AND I really don't want to advertise that I have a $300 device out in the open, at night.

I was torn between the portable unit and the hard-wired unit. Portable goes with me if I part ways with my RV, but it can be forgotten when packing up camp.
I can use the portable one to test the power pole before even backing in, but it is out in the open and is susceptible to theft.
Hughes sells a kit (you can buy your own parts at any box store for less) that you can use to mount an outlet and plug internally in your RV in between the external receptacle and the RV breaker by cutting the feed wire. If mounted in a convenient location then the best of both worlds can be had.

Overall I like this product and will buy it again.

First trip is in a few weeks, I'll really know then and if I change my mind I'll post an update.


Surge Protector is working, I guess. It's always lit up and the RV is plugged in most of the time for the past year. I don't know if there have been any electrical surges but it hasn't affected me if there were.


First off, it is huge. Bought to protect our brand new travel trailer. Bought this model because of it's reputation and reviews and the fact that the protection modules can be replaced so you do not need to buy an entire new surge protector should you experience a fault. It is bright at night and the optional overlay screen certainly helps. This would be 5 stars all day long if it were WiFi enabled so that you could monitor your power when not at you rig/camp spot. Would buy again.


The product works according to it's specs. E-trailer was a user friendly way to order the product!


I like the product very much and would give it 5 stars if it could be viewed on more that one device!! I would like to see it on my phone AND iPad. However, right now you can only do one or the other. Also, with so many pedestals being “short”, the surge protector has to be “bent” and a lot of it is on the ground, especially where it’s plugged to the RV. I do like how you can see the amps and volts on my phone. It’s pricey and I hope it’s worth it!!


Etrailer shipped the same day as ordered. Very helpful. Etrailer is my "go to" for RV parts. Haven't installed product yet, but it is as advertised


Pretty Cool Stuff!
Plugged it in, waiting
for the face to light up, plugged in the camper. Awesome! Everything works, the app works, I can monitor my electrical voltage, current, anywhere. It's pretty cool.


I thought the bright light dog face would be an issue but it's not. We have used it for an entire season and I am very happy with it. We carry an extra surge module just in case. Nice that this is replaceable. Just plug and play, monitor the power with the app. I always lock it with a cable lock. Don't want the dog to wander off.


Well seeing as how it was just purchased ,yes 5 stars, great service , easy to hook up and works great with the Bluetooth with very good range.



After a year my empower Watchdog Surge Protector is still fantabulous, so much so that I purchased another for the 5th wheel we live in when not traveling with our super c. I can monitor either one from inside the 5th wheel while at home.


I wouldn’t use any other surge protector for my TT. It’s detected low voltage and open ground at different campgrounds and has done an outstanding job.


I love etrailer. Great prices.



After a year its still working well protecting our Motor Home. For sure it protected us in Key West during a thunderstorm. An RV next to us was damaged by a surge.


I have never used a surge protector. This is as about as easy as it gets. Really like the ring that is attached to lock it to the post. I recommend this product.



Works great. Provides peace of mind when connecting to shore power.


Works as advertised!


Just received the Watchdog Surge Protector yesterday afternoon. Plugged it in and seems to be working fine. Have yet to load the app but I anticipate no problem in doing so. Etrailer has been excellent in their communication and service.


Just received the surge protector so can’t attest to its quality. Larger than I expected but it is what I ordered.
However, the service from etrailer is great as ever. Always what you hope for.
Order delivered on time.

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