1. RV Surge Protectors
  2. Hughes Autoformers
  3. 50 Amp
  4. Surge Protector
  5. Portable
  6. Bluetooth
  7. 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
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Our Price: $249.22
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RV Surge Protectors
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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. Lowest 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 etrailer.com or call 800-298-1624 for expert service.
  • All Info
  • Reviews (306)
  • Q & A (17)
  • Photos
  • Why etrailer?

Hughes Autoformers RV Surge Protectors - HU87FR

  • 50 Amp
  • Surge Protector
  • Hughes Autoformers
  • Portable
  • Bluetooth
  • Emergency Shut Down
  • 4800 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 4,800 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


  • Surge Protector dimensions: 5-1/2" long x 4" wide x 9" tall
  • Cord length:
    • Input: 10"
    • Output: 9"
  • Amps: 50 amps
  • Energy dissipation: 4,800 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 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.

PWD50-EPO Power Watchdog Surge Protector with Bluetooth and Emergency Shut-Off - 50 Amp - Portable - EMS

Installation Details HU87FR Installation instructionsAlternate Instructions HU87FR Installation instructions

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   (306 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.

- HU87FR

This surge protector arrived earlier then was indicated by two weeks! I was very pleasantly surprised when this company had an employee reach out to me to offer and alternative device they noted was in stock. As I was committed to owning a 50 amp protector (instead of the 30 am protector offered) I let them know I was going to stick with my original order and wait for the surge protector I believed was best for my fifth wheel. The employee let me know the status of my order at every stage of my order and I was really pleased to have my new surge protector weeks ahead of the communicated delivery date. This company really went the extra mile and I saved over [XX] dollars on what I would have paid on [online vendor] for the exact same device. I will be shopping here again!

- HU87FR

After reading reviews of other surge protectors, we opted for the portable Watchdog EPO for several reasons - excellent reviews, ease of installation and bluetooth technology. I love being able to watch voltage and amp draw on the App. I also ordered a replacement surge module. I realize Hughes offers one free replacement within the first two years, but being fulltimers, we didn't want to wait for a replacement. This was my first purchase from eTrailer and couldn't be happier! Communication was awesome! They notified me with a tracking number when my order shipped and even informed me it had been delivered. Wow! The instructions were very clear and well written and I had it online and synced with the app within 10 minutes. I'm very impressed with it's performance.

- HU87FR

Rating is for etrailer, not the Watchdog as I won't be using till January. Communication was beyond a 5 star rating. Never have I had the communication I experienced with this purchase from placing the order to delivery. The Watchdog was priced competively, box undamaged upon delivery, now just waiting to travel to our snowbird destination so I can start using it.

- HU87FR

I have most of what I need for my RV but when I do need something I go to people who have good products stand by them and are trust worthy and care about there customers. You people fit that bill for all, sorry to say that is not true for some today, Take Care Have a Great Day, Best to All,

- HU87FR

I am very happy with the product! (once I got it - UPS lost it!) Simple, quick and efficient! Transfer switch works quickly and solidly. The Bluetooth connectivity is a bonus allowing you to see the status of the connection in an instant via your smart device!

- HU87FR

Love it. Watchdog easy to install and info given on my smart phone just amazing . Every owner should have one to protect their rv. Rene.

- HU87FR

I am impressed. It is bigger than I expected but I think it is going to work well. Glad that I finally bought a protector. Bluetooth is a plus, dont have to go outside to see whats going on with power.

- HU87FR

So far so good, power surge prior to ordering this may comment more once we have an actual surge.

- HU87FR

We are pleased with the Power Watchdog surge protector. Came within a few days and the app is easy to follow.

- HU87FR

We haven’t used it yet but it came on time! Communication with etrailer staff is wonderful! I’m sure it will work great! We wanted a surge protector which was for more than one use. We stayed at an older campground, one we frequent often. There was a power surge there & it wiped out the furnace & AC! Now we will be protected!

- HU87FR

Disappointing delivery. Product was shipped in the manufacturers retail packaging and the box was open when it was dropped on my doorstep. Looks like everything was there and I'm glad someone was at my house during the time of delivery.

- HU87FR

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.

- HU87FR

ordered 06/25/2021 received 07/01/2021, registered warranty on line and it's plugged in and working, all good for now, thx etrailer, you always provide the best services and pricing and so glad you Don't use FedEx (lost somewhere shipping), another main reason I will continue to order from etrailer

- HU87FR

Just received the Power Watchdog Surge Protector. Haven't used it yet but was very pleased with the service and packaging. I have ordered items in the past from etrailer and have had good experiences with the company.

- HU87FR

Called WatchDog directly as two of my male plugs would not push in - they suggested a lube to see if that solves the issue

- HU87FR

Received want I expected. A quality product to protect our Motorhome. ETrailer had the best price and shipped it within 24 hours.

- HU87FR

Seems like a good product. Bluetooth range is not to good. Price was great and shipping was quick.

- HU87FR

Not installed but produce exactly what I wonted very impressed with your company how professional every thing was handled.

- HU87FR

Works great,knowing that I’m protecting my RV while plugged in is just another level of comfort. Also being able to see the current draw from the app is really informative.

- HU87FR

Have not used it yet,but my friend who is an electrical contractor and knows all things electric recommended this after he got one for his rv.I am confident it will perform as advertised.

- HU87FR

Good company fast delivery . My only complaint is why do you transfer package to usps vs just having ups follow through with delivery.

Thank you for your review. On items smaller than 10 lbs we ship USPS.
-- Etrailer Expert Sierra K - 07/30/2021

- HU87FR

Parts arrived on time and exactly as ordered. Price was as good or better than alternatives. I always check e-trailer for my needs and product reviews.

- HU87FR

From the moment I ordered the surge protector to receiving it today was probably one of my best experiences with on line ordering. This company has a great communication system in place and there is no guessing what the status is of your order. I will continue to order my product needs from e-Trailer!! Thanks

- HU87FR

Delivered when promised to a very remote location that I sometimes have difficulty in receiving what is ordered on time. Easy to follow instructions and worked as promised right out of the box. App was a plus in monitoring the new Class A we purchased. This was a first time use for both. Time will tell how reliable it is;)

- HU87FR

Came packaged nice with no damage. Order arrived very timely, 3 days once it shipped. I've plugged it in and it worked but haven't had it on a camping trip yet.

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Info for this part was:

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Installed by:
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