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Power Watchdog Surge Protector with Bluetooth - Portable - 50 Amp
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Hughes Autoformers

Power Watchdog Surge Protector with Bluetooth - Portable - 50 Amp

748 Reviews | 30 Questions
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 RV Surge Protector
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hughes autoformers rv surge protector power watchdog with bluetooth - portable 50 amp
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hughes autoformers rv surge protector 50 amp hu47fr
hughes autoformers rv surge protector 50 amp power watchdog with bluetooth - portable
hughes autoformers rv surge protector power watchdog with bluetooth - portable 50 amp
hughes autoformers rv surge protector 50 amp portable hu47fr
hughes autoformers rv surge protector portable hu47fr
hughes autoformers rv surge protector
hughes autoformers rv surge protector 50 amp portable hu47fr
hughes autoformers rv surge protector portable power watchdog with bluetooth - 50 amp
hughes autoformers rv surge protector 50 amp portable
hughes autoformers rv surge protector 50 amp portable
hughes autoformers rv surge protector portable hu47fr
hughes autoformers rv surge protector
hughes autoformers rv surge protector 50 amp power watchdog with bluetooth - portable
hughes autoformers rv surge protector portable power watchdog with bluetooth - 50 amp
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hughes autoformers rv surge protector 50 amp

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While a basic surge protector will keep your RV electronics safe from power spikes, the Power Watchdog will alert you if there are any other problems. Use the smartphone app to monitor your system and get notified if low or high voltage is detected. Great Prices for the best rv surge protector from Hughes Autoformers. Power Watchdog Surge Protector with Bluetooth - Portable - 50 Amp part number HU47FR can be ordered online at etrailer.com or call 1-800-940-8924 for expert service.
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Hughes Autoformers RV Surge Protector

  • 50 Amp
  • Surge Protector
  • Portable
  • Bluetooth Monitoring
  • Hughes Autoformers

While a basic surge protector will keep your RV electronics safe from power spikes, the Power Watchdog will alert you if there are any other problems. Use the smartphone app to monitor your system and get notified if low or high voltage is detected.


Features:

  • 50-Amp surge protector prevents damage to your RV from power spikes
  • 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
  • Free Smartphone app for iOS and Android connects via Bluetooth to monitor your system
    • Quickly pair using the QR code on front of device
    • Monitor 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
  • LEDs illuminate in different patterns to indicate if power is steady or if there's a problem
    • Compare LED lights to legend on unit to determine which error
  • Housing is IP65 rated for weatherproof 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


Specs:

  • Surge protector dimensions: 3-3/4" long x 2-15/16" wide x 7" tall
  • Cord length:
    • Input: 10-1/4"
    • Output: 8-5/8"
  • 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.


Beyond Basic Surge Protection

The most affordable RV surge protectors will provide basic protection from voltage spikes caused by lightning or other transmission issues. They can typically withstand a few minor spikes, or only one major spike, before they need to be completely replaced.


Power Watchdog surge protectors go beyond the basics. Plug it in before connecting your RV to get a clear indication of any wiring issues at your park pedestal. 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.



PWD50 Power Watchdog Surge Spike Protector with Bluetooth - 50 Amp - Portable

Item # HU47FR

Installation Details HU47FR Installation instructions





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Customer Satisfaction Score:

Ratings & Reviews

4.8

748 reviews
5 Stars
(657)
4 Stars
(59)
3 Stars
(14)
2 Stars
(5)
1 Star
(13)
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by:
The Power Watchdog is a great addition to your RV. I would totally recommend it to everyone.
by:
We have been using the 30A version with our 50A trailer using a dog bone adapter for two years (previously had a 30a trailer for 3 years). During this time we had to monitor our usage to make sure we didn’t go over. We have now been using the 50A version on our first week long outing of the season and I should have gotten the 50A right away rather than stretching the use of the 30A surge protector. Works great, one of those purchases that goes unnoticed until you need it. Some strong storms may be rolling in as I type this so the surge may come in handy.

The app works great and really like that the 50A version shows you your consumption on both legs of the circuit. Also helps you understand which outlets are on which branch by tuning things on/off. Overall, a great unit for the price and gives peace of mind when plugging your camper into the power pedestal.

Shipping (USPS) was slower than expected, 2 days later than expected which had me a bit nervous as it came the day before we left. We have been having this issue with USPS on other shipments from other companies as well.
by:
Fast shipping!
by:
The 50 amp Watchdog is a solid piece of equipment. I especially like that I can monitor the RV power system on the fly, from my phone, using the app. Thank you etrailer.
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by:
Great product. Great price
by:
Very pleased with the people. There was a shipping error that a delay but their shipping department mananaged in a timely manner. I have recommended this to many people
John profile picture

John

7/12/2025

It saved my electronics from being destroyed when lightning struck my building next to rv

by:
Arrived on time at a great price!
by:
Well known brand in the rv world . Piece of mind in campground
where power is often iffy.
by:
Fast delivery, excellent product
by:
Excellent product!
by:
About a year ago you purchased a Hughes Autoformers Power Watchdog Surge RV Surge Protector. I purchased this a year ago and have used it many times with no problems. My brothers recommend I get this and the water regulator to protect my new travel trailer.
Samuel profile picture

Samuel

7/15/2022

very good

by:
Excellent Service from etrailer.com
The watchdog surge protector is great!!!
by:
Really like the extra feature Bluetooth to monitor Voltage, and usage.
by:
I like this surge protector. I can watch in real time what voltage, watts, and ampere readings on my smart phone.
by:
Before buying this watchdog power suppressor, I never "experienced" or expected that a power pole at campgrounds were defective. Boy was I wrong!

During a month-long 5000 mile road trip, we camped at no less than eight campgrounds with 30A and 50A power poles. At two of these campgrounds, I used the watchdog to confirm proper and safe power was available. It was not, and we had to immediately demand the campgrounds repair the outlets or rebook us into a different site.

Just to make it absolutely clear, power "was" available, on one or both outlets, BUT, the ground was faulty. As we were camping in 90F+ temps, the AC was critical and sleep time with AC running had to be 100% safe and effective power.

This device may be pricey, BUT, it saved us from two very unsafe situations, a long way from home! If you are seeking to save a penny or two, good luck! This product is 100% WORTH THE PRICE for safe and proper power for your RV!!!
Gwendolyn Y. profile picture
Etrailer Expert

Gwendolyn Y.

4/9/2026

I'm so glad that you got the Watchdog when you did! I always say that it's better safe than sorry when it comes to safety.

by:
We have a horrible electric setup at our campground . Power surges spikes etc. Blew our inverters well. Bought this to help stop damage in the future . So far it's worked. Had 2 more surges since I installed it. Saved me time money and aggravation. Well worth the money
Tom profile picture

Tom

10/7/2023

Good product all around

Mike L. profile picture
Etrailer Expert

Mike L.

10/23/2023

@Tom Awesome, we're glad to hear that!
by:
Shipping very fast. Watchdog easy to set up. Like that I can replace the surge module without sending in. So far very happy.
Harry profile picture

Harry

2/17/2023

A year later still going strong. Unit stays plugged in at my house and when we’re on the road. So all year long. Haven’t had a bit of trouble with it.

by:
I was debating with myself about portable versus an installed unit on the Rv and decided to go portable. I like how I can get to a campground and immediately know if the power is good before hooking up the Rv. I could do this with the installed unit but the portable unit seems more adept at this. Also like having surge protector with all the lightning storms going thru FL recently.
by:
I purchased this Surge Protector about a year ago and it has provided excellent service each and every time. It is built very sturdy and provides needed piece of mind that your RV won't suffer a catastrophic electrical event in the form of a power surge, while also informing you if your electric supply is up to par.
by:
This has really helped me manage my energy using the Bluetooth data to the app, especially when we plug in to 15 amp driveway power. The indicator lights on the unit give me instant test of campground wiring before I plug in the coach. And it has a replaceable surge protection module.
by:
The good news is we haven't had an incident to put the unit to the test. Even so, it's peace of mind having it in use, and being able to monitor usage makes hooking our 50 amp R to a 30 amp service easy without popping breakers.
by:
As described and working so far.
by:
Power watchdog surge protector looks to be a quality product. I like the bluetooth aspect to the product too. Etrailer does a great job of getting the product shipped and you informed on the delivery time. Anything to do with towing or trailers I check with etrailer first.
by:
Absolutly no problems with this surge protector.watchdog has been faithfully on duty day and night
by:
I am very happy with this purchase. Being able to view the draw the RV is using is very helpful and informative to understand how much you can run without overloading the circuit. Highly recommend!
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See what our Experts say about this Hughes Autoformers RV Surge Protector

Do you have a question about this RV Surge Protector?
  • Surge Protector for 2026 Thor Pasadena 34XG With 50A Service
    Hey Ed, congratulations on the new motorhome! For a surge protector I would stick with the Watchdog models from Hughes Autoformers. These are nice because the surge model can be replaced if you actually experience a surge instead of replacing the entire unit. They have various options at for 50A so you can choose from the following: -Power Watchdog Surge Protector with Bluetooth - Portable - 50 Amp # HU47FR -Portable Power Watchdog Surge Protector with Bluetooth and Emergency Shut Down...
    view full answer...
  • Recommended Warning Limits For The Power Watchdog Surge Protector With Bluetooth - 50 Amp
    The acceptable power range for the Power Watchdog Surge Protector with Bluetooth - Portable - 50 Amp # HU47FR is between 104 volts - 132 volts, just like with the 30 amp # HU97FR. I recommend placing the low end at 109v and the high end 127v so that you have a 5v buffer to notify you before it gets out of the safe zone.
    view full answer...
  • Difference Between Different 50 Amp Power Watchdog Surge Protectors
    Hey Chrystal! The Power Watchdog Surge Protector # HU47FR lacks the emergency shut down so we can rule that one out. The # HU87FR and # HU62VR both have the emergency shut down so the main difference is how they are monitored. If you're fine with Bluetooth only then you want to get the # HU87FR. This also has a higher energy dissipation at 6,100 joules. If you want to be able to monitor this outside of the range of Bluetooth and you have Wi-Fi available at the trailer then the # HU62VR...
    view full answer...
  • Comparing Power Watchdog Surge Protector HU87FR And HU47FR
    Hello Sonia. The Power Watchdog Surge Protector # HU47FR has Bluetooth compatibility. The Portable Power Watchdog Surge Protector # HU87FR has Bluetooth and an emergency shutoff feature which is why it is more expensive. The emergency shutoff cuts power if the current drops below 104V or raises above 132V. This helps protect your electronics in the case of a power surge or drop.
    view full answer...
  • Recommended In-Line Surge Protector to Monitor Generator Voltage Remotely
    Hey Stanley. The app screen for the Power Watchdog Surge Protector with Bluetooth item # HU47FR is going to look like the picture I attached below. It'll show the wattage being used along with the amps and voltage. The Power Watchdog Surge Protector with Bluetooth item # HU47FR includes 50 amp male and female 4-prong plugs. Since you're wanting to install it in-line, I recommend the Power Watchdog Surge Protector item # HU82VR, which has the same features and Bluetooth monitoring abilities...
    view full answer...
  • Can Power Watchdog Surge Protector Plug Directly Into RV
    Hello Joellen; you can plug the Power Watchdog Surge Protector # HU47FR directly into your RV. Basically, as long as it is plugged in-line between your RV and the shore power it will work as intended. Another option is to get the # HU27FR and hard wire it into your RV so you don't have to plug anything in.
    view full answer...
  • Can A 30 Amp Surge Protector Be Used On A Trailer Wired For 50 Amp Service
    Hey Greg, Even though your trailer doesn't have two air conditioners the power center is set up for 50 amps which means it has two separate power legs built into the panel. If you used a adapter to switch down to 30 amp anything wired to the non-used power leg would not have power. If you pull the circuit breakers out you can see the busbars I'm talking about. One hot wire from the 50 amp power cord runs one of these busbars and the other runs to the other providing power to that whole...
    view full answer...
    Image 1 for
  • Is Power Watchdog Surge Protector A Good Fit For 2017 Grand Design Reflection 26RL
    Hello again Robert! Yes, the Power Watchdog Surge Protector # HU47FR is a good fit for your 2017 Grand Design Reflection 26RL. This covers the basics and gives you Bluetooth monitoring without getting too fancy for occasional use. It also has a replaceable module so you don't have to replace the entire unit if it is overloaded. Also yes, you can use this with 30A you'll just need an adapter like # A10-3050AVP. The important thing with the surge protector is matching the 50A service on...
    view full answer...
  • Availability of 50 Amp Hughes Autoformer
    Hi Randal; Hughes Autoformers is a brand so I'll give you the two 50 amp products I think you might be looking for. If you're looking for the voltage booster with a surge protector that is the # HU57FR. We also have the Power Watchdog Surge Protector with Bluetooth # HU47FR. If you were looking for something else like a 50 amp replacement surge module I will need to know what the replacement is for first.
    view full answer...
  • Using 50 Amp Power Watchdog Surge Protector With 30 Amp Service
    That is not a problem, you can use Power Watchdog Surge Protector with Bluetooth, # HU47FR for a 50 Amp service and an adapter such as the Mighty Cord RV Power Cord Adapter Plug for 50 Amp Female to 30 Amp Male, # A10-3050AVP when needed. You want to match your surge protector to the rating of your TT's service for preventing damage to your electrical system from power spikes.
    view full answer...
  • Are Replacement Surge Modules Available For Hughes Autoformers Power Watchdog Surge Protectors
    The Surge Modules for Hughes Autoformers Power Watchdog surge protectors are available but they are specific so to each model so you'll want ensure that you're getting the correct one. The # HU58FR is compatible with the portable # HU87FR and hardwired # HU27FR 50 amp surge protectors. The # HU38FR is compatible with the portable # HU47FR 50 amp surge protector. The # HU98FR is compatible with the portable # HU67FR and hardwired # HU77FR 30 amp surge protectors. The # HU48FR is compatible...
    view full answer...
  • Can You Use 30-Amp Surge Protector on 50-Amp RV
    It is best to match any surge protector to the service of the RV. Such as the 30 Amp Power Watchdog Surge Protector, # HU97FR or the 50 Amp version of, # HU47FR being used with RV's that match their respectively rated services. You can use an adapter such as the Mighty Cord RV Power Cord Adapter, # A10-3050D90VP to adapt your RV's 4-prong 50-amp power inlet for use with a 30-amp 3-prong extension cord/Power Pedestal and place the surge protector inline. While yes, this can be made to...
    view full answer...
  • Troubleshooting A Hughes Autoformers Power Watchdog Surge Protector Thats limiting Voltage
    If the Portable Power Watchdog Surge Protector # HU87FR was limiting the voltage running to your RV then it's most likely a bad control module and you'll need the Replacement Surge Module for Power Watchdog Surge Protector with Emergency Shut Down # HU58FR. These modules are model specific so you'll want to ensure you're purchasing the correct one for your model. I've listed the modules and their compatible systems below incase you have a different one. The # HU38FR fits the # HU47FR The...
    view full answer...
  • Can the Power Watchdog Surge Protector with Bluetooth Be Used With a Generator
    Yes, the Power Watchdog Surge Protector with Bluetooth, # HU47FR, for 50 amp and the 30 Amp version, # HU97FR can be used with a generator. However, many generators (portable) have a floating ground/neutral. If you do have a floating neutral generator then you will also need the Hughes Autoformers Ground Neutral Bonded Plug for Generators, # HU33FR to bond the neutral and ground thus preventing an open ground or open neutral error fault to occur.
    view full answer...
  • Using a 30 Amp Power Watchdog Surge Protector With 50 Amp Service
    You can use an adapter such as the Mighty Cord RV Power Cord Adapter Plug for 50 Amp Female to 30 Amp Male, # A10-3050AVP to use a 50 Amp surge protector with a 30 Amp power pedestal, but you cannot use a 50 Amp power pedestal to a 30 Amp service RV or surge protector. Any surge protector should be matched to the service of the RV. Such as the 30 Amp Power Watchdog Surge Protector, # HU97FR or the 50 Amp version of, # HU47FR.
    view full answer...
  • Which Surge Protector Should I Use For My RV
    When it comes to which surge protector is right for you, The Power Watchdog Surge Protector with Bluetooth - Portable - 50 Amp # HU47FR will get the job done, it is more powerful then the 30 amp. This surge protection module offers 6,100 joules of protection in case of a lightning strike. It can be easily replaced after it wears out, no need to replace the entire unit. You can monitor your system through the free smartphone app for IOS and Android which connects via Bluetooth. This product...
    view full answer...
  • Availability of Hughes 50 Amp Watchdog Surge Protector with Emergency Shut Down PWD50-EPO
    We do carry the Portable Power Watchdog Surge Protector with Bluetooth and Emergency Shut Down # HU87FR. This is our part number for the PWD50-EPO from Hughes.
    view full answer...
  • How to Measure Power Usage for 50 Amp Service on Motorhome
    We have 2 ways that you can accomplish this; you can do it manually or you can use a Power Watchdog device that actively reads and gives feedback to how much power you're using. Calculating this manually means you're looking at all of the different parts of your motorhome that are pulling power and then noting what they are rated to draw and adding all of that up. This can be a little tricky and time consuming but it can be done. The Power Watchdog device, found as parts # HU47FR, # HU87FR,...
    view full answer...
  • Why Would Two Fireplaces Suddenly Stop Working In An RV
    Hi Jeremy, It sounds to me like there was a power surge that ran through your trailer and at minimum the fireplaces took too much voltage and blew. You can try disconnecting them from power for 15 minutes and then retesting them but it sounds like you most likely had them disconnected for a longer period of time. I'd be willing to bet other sensitive electronics (stereo, tv, etc.) could also potentially be damaged. If they don't come back on then you're unfortunately looking a complete...
    view full answer...
  • Replacement Surge Module for Power Watchdog Surge Protector with Emergency Shut Down
    I have a solution for you, but the # HU38FR is designed for the Portable Power Watchdog Surge Protector with Bluetooth - 50 Amp # HU47FR without the Emergency Shut-off feature. Your PWD50-EPO is the Portable Power Watchdog Surge Protector with Bluetooth and Emergency Shut Down - 50 Amp # HU87FR, so you'll need the Replacement Surge Module for Power Watchdog Surge Protector with Emergency Shut Down - 50 Amp # HU58FR.
    view full answer...
  • Recommended Surge Protector For A 50 Amp Generator
    If your generator is producing 50amp power then yes, you could use the Power Watchdog Surge Protector with Bluetooth # HU47FR for extra surge protection for your sensitive electronics. That being said 50amp service isn't enough to power everything in a residential setting. You'll have to prioritize what you want to power and flip off the breakers for non-essential items.
    view full answer...
  • Can 30 Amp Portable Power Watchdog Surge Protector Be Used On 50 Amp Trailer
    I don't recommend using a 30 amp surge protector on a 50 amp trailer. This would require adapters and will limit power going to the trailer. Instead, for a 50 amp trailer, you'll need to use the Portable Power Watchdog Surge Protector with Bluetooth part # HU47FR.
    view full answer...
  • Recommended Generator Set for 2019 Forest River Salem 30KQBSS Travel Trailer
    I recommend you only consider an inverter type generator. From the specs available to me online, your 2019 Forest River Salem 30KQBSS Travel Trailer is a 50-Amp service with 2nd A/C Prep option. If you have have the second AC unit installed or a 30-Amp service instead, please let me know. But based on these specs, I recommend the Champion 9,000-Watt Dual Fuel Inverter Generators w/ Parallel Kit for 7,000 Running Watts, # CH49FR. This option will operate up to 14 hours on gasoline, or...
    view full answer...
  • Picking The Correct Surge Protector For Your RV
    Watchdog surge protectors like the Portable Power Watchdog Surge Protector with Bluetooth - 50 Amp Item # HU47FR will need to match your camper amperage to properly function. The adapter from 50 amp to 30 amp will go between the surge protector and the power pedestal and you should have no issues. If you need a new 50 amp to 30 amp adapter I recommend the Power Grip RV Power Cord Adapter w/ Handles - 125V - 50 Amp Female to 30 Amp Male Item # CAM55185. The built-in handles on the each...
    view full answer...


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