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  1. RV Surge Protector
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  4. Surge Protector
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  6. Automatic Shutoff
  7. Bluetooth Monitoring
  8. WiFi Monitoring
Portable Power Watchdog Surge Protector with Bluetooth, WiFi, and Emergency Shut Down - 30 Amp
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Hughes Autoformers

Portable Power Watchdog Surge Protector with Bluetooth, WiFi, and Emergency Shut Down - 30 Amp

Part Number: HU42VR
1005 Reviews | 9 Questions
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$339.99
Retail:$552.55
You Save: $212.56
 RV Surge Protector
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hughes autoformers rv surge protector portable hu42vr
hughes autoformers rv surge protector portable power watchdog with bluetooth wifi and emergency shut down - 30 amp
hughes autoformers rv surge protector 30 amp
hughes autoformers rv surge protector portable power watchdog with bluetooth wifi and emergency shut down - 30 amp
hughes autoformers rv surge protector 30 amp portable hu42vr
hughes autoformers rv surge protector
hughes autoformers rv surge protector portable power watchdog with bluetooth wifi and emergency shut down - 30 amp
hughes autoformers rv surge protector 30 amp portable power watchdog with bluetooth wifi and emergency shut down -
hughes autoformers rv surge protector portable hu42vr
hughes autoformers rv surge protector 30 amp
hughes autoformers rv surge protector portable hu42vr
hughes autoformers rv surge protector 30 amp hu42vr
hughes autoformers rv surge protector 30 amp portable hu42vr
hughes autoformers rv surge protector 30 amp portable power watchdog with bluetooth wifi and emergency shut down -
hughes autoformers rv surge protector 30 amp portable

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This portable surge protector alerts you instantly of voltage problems and automatically cuts power to your RV when a fault is detected. Built-in Bluetooth and Wi-Fi monitor your system from anywhere around the globe via a smartphone app. Great Prices for the best rv surge protector from Hughes Autoformers. Portable Power Watchdog Surge Protector with Bluetooth, WiFi, and Emergency Shut Down - 30 Amp part number HU42VR 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 - HU42VR

  • 30 Amp
  • Surge Protector
  • Portable
  • Automatic Shutoff
  • Bluetooth Monitoring
  • WiFi Monitoring
  • Hughes Autoformers

This portable surge protector alerts you instantly of voltage problems and automatically cuts power to your RV when a fault is detected. Built-in Bluetooth and Wi-Fi monitor your system from anywhere around the globe via a smartphone app.


Features:

  • 30-Amp surge protector prevents damage to your RV from power spikes and sustained high or low voltage
  • 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 built-in Bluetooth and Wi-Fi 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
  • 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 2,300 joules of protection in case of lightning strike
    • Can be replaced once it wears out - no need to replace the entire unit
  • Fault history is recorded up to 10 faults
    • Time stamp provides detailed information on shut downs
  • 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
    • Lights can be dimmed via the mobile app
  • Housing is IP65 rated for protection against dust and rain
  • Metal bracket around cord provides secure place to attach cable lock
  • Side entry receptacle and cover relieve stress on the connection
    • Receptacle bay includes an integrated light that can be turned on for nighttime visibility
  • ETL listed


Specs:

  • Amps: 30 amps
  • Energy dissipation: 2,300 joules
  • Limited lifetime warranty


PWD30EPOW Power Watch Dog Surge Spike Protector with Bluetooth, WiFi, and Emergency Shut-Off - 30 Amp - Portable







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Customer Satisfaction Score:

Ratings & Reviews

4.8

1005 reviews
5 Stars
(883)
4 Stars
(90)
3 Stars
(15)
2 Stars
(2)
1 Star
(15)
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by:
Love the Hughes Industries Power Watchdog Surge Protector PWD30EPOW. It makes sure you’re getting safe power to your rig, lighting up white to let you know you’re OK, and red if there’s a problem. We’re using ours with our 2026 LTV Wonder. Also picked up a spare replacement “brain” module should we receive an unexpected surge. Way cheaper and easier to replace than damage to something in the rig.
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by:
I wanted to like this, and it does do the basic job and. I trust that it is well engineered and built and will protect our trailer, but the app is actually several apps that are for various products that they sell, and it is not clear which is for which product.


Also, although it uses bluetooth, it will not function with cell service, which while camping isn’t a guarantee, and also requires a data plan. Our cell phones are basic and can make and receive voice calls and texts, but because of their software design will not function, and in fact will not even “activate” if all of those conditions are not met. So essentially, all of the fancy monitoring that it is marketed with is unused in our case. It does, thankfully, still function as a “dumb” surge suppressor to protect the trailer.
Kate F. profile picture
Etrailer Expert

Kate F.

8/10/2026

I completely understand your frustration with the app Jeffrey, and I agree that the different apps and features could be much clearer. I did want to mention that Bluetooth itself does not require cell service or a data plan, although some app features may require an internet connection. Most importantly, even without those features, your Power Watchdog will continue doing its main job of protecting your trailer from electrical issues and keeping you and your RV safe. I do appreciate such an honest a thorough review =)

Jeff profile picture

Jeff

8/10/2026

@KateF Thank you for your reply. Yes, I know that the unit will work with on Bluetooth without a cell, but it can not be set up at all without your cellphone having a data plan. Also, the unit can not be sst up without being plugged in/powered on, and we do not have a 30amp hookup at home, even if we do have wifi/internet for iur phone when home. Catch-22. But we have used it as a dumb protection anyway. Speaking as a retired software engineer, I know that the app could have been designed to set up the box without any kind of Internet access at all. This was a choice the manufacturer made.
by:
My Marinco Park Power right angle connector with handle fits perfectly.Everything about this surge protector is of the highest quality. EMS working flawlessly, all vitals are at you fingertips on the app. I also purchased the cable lock as well. Looking forward to many years of service.
by:
The watchdog unit appears to do what it’s meant to do- I’m more impressed with the outstanding service I received from talking with Bird on this and other products I’ve had to purchase from etrailer. Thankx!
by:
Disclaimer: This is my first surge protector as it is my first RV. Very nice looking product and easy to operate. Linked to WiFi easily and able to monitor activity via cell phone.
I like the clip to lock the unit to the post. I look forward to enjoying this product’s reputation for years to come.
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Gwendolyn Y. profile picture
Etrailer Expert

Gwendolyn Y.

4/17/2025

Looks like you got a nice spot, Efren! Have any other places picked out that you will be traveling to next?

by:
Great, easy to use product. Alerted and saved us from a low voltage situation during a heat wave due to everyone running their AC's - our neighbors had no idea there was any problem with the power.
Highly recommend!
by:
After verifying with eTrailer about order, was received in great condition very quickly.
by:
Just plug it in today and everything seems to work as it should
Had 1st gen and like the 2 gen better now I have a back up
Thomas profile picture

Thomas

5/28/2026

Great easy to useo

by:
Well built surge protector with additional shutdown protection in the event of voltage variations. Great protection for my camper.
by:
The wireless connectivity is great and so useful. Surge serpression, low & high voltage work perfectly. Best part is this unit can be repaired easily and cheaply. I've had two expensive Progressive Industries Surge Protectors that lasted just over a year each and there not repairable...such a waist!
by:
Package arrived in good shape and as tracked with the app. Purchased for an upcoming trip so no operation information yet.
by:
etrailer makes the purchases easy and hassle free. If you have any questions or issues they are a phone call away with very knowledgeable support personnel
by:
Received my Watchdog today from UPS! It was packaged nicely! Tomorrow I'm supposed to pick up my new-to-me 2023 Renegade Vienna, so I wanted to get things ready. So I downloaded the correct app for this model, and after multiple attempts to sync my iPhone w/ the app, checking iPhone settings, looking on the help videos I was about to give up. Now I had thought about plugging the Watchdog into my home electrical outlet using my new 30A-15A dogbone but I thought....surely they would have included that in the directions? So using Google AI I searched and they listed some of the same things to check, version of app etc....and they also stated "The Bluetooth radio on the Power Watchdog will not function unless it is plugged in and receiving power. The dog face should be lit up." After I powered up the Watchdog my iPhone located it in seconds using Bluetooth! So please include to power the Watchdog up in the directions for us manual freaks who read the directions verbatim. I'm sure the product works great, I'll find out tomorrow with the RV! Thanks for reading and hope this helps someone else. I would have given 5 stars had it not been for the directions given.
by:
Excellent company and staff to do business with. I will definitely order from them again - customer service is outstanding.
by:
havent used it yet but very impressed
by:
Joshua was excellent with customer service, surge protector was exactly what I was looking for. Came on time and with no issues
by:
Best surge protector on the market, in my opinion.
by:
Very happy that I can see the status of the unit on my cell phone. I am impressed that the unit I ordered will shut off to protect the camper and then come back on when the power is safe.
by:
Looks good. Got here quick.
by:
There are THREE different apps, make sure you download the correct one. You also need to give them an email address and create an account just to get the device connected to Bluetooth or WiFi. If there were ANY other surge protectors that offered a WiFi connection I’d probably go that route

The female plug and rain door/cover are very loose. My rv plug kept just falling out of it if you even brush the cable
by:
Box was pretty beat up. Contents ok. Well padded. This is my second Watchdog. Worked great out of the box. Nice upgrade with the covered connection.
by:
Fast delivery
Harry profile picture

Harry

12/7/2025

Our Hughes Power Watchdog Surge Protector HU42VR is still working perfectly. There have been no issues or defects. I should get compensation for how many people I have told about this, lol. Great product!!

by:
I have used this for a year now. It has worked flawlessly.
by:
Product is as described. Etrailer has the best packaging of any company that has shipped something to my home. They take great care in shipped their products.
by:
Works as advertised
Joe profile picture

Joe

10/26/2025

Still working

25
1005
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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?
  • What is the Difference Between the Power Watchdog # HU67FR and # HU42VR?
    Hello Kevin, Thanks for writing in. The main difference between the Power Watchdog Surge Protectors # HU67FR and # HU42VR comes down to the monitoring capability, housing design, and surge protection rating. The # HU67FR is the newer Generation 2 model. It has both Bluetooth and Wi-Fi connectivity, which allows you to monitor the system remotely through the app even when you are away from the RV, as long as the unit has access to Wi-Fi. It also has an updated housing design with improved...
    view full answer...
  • Dimensions of 30 Amp Portable Power Watchdog Surge Protector
    Hey Mark, The 30 amp Portable Power Watchdog Surge Protector with Bluetooth, Wi-Fi, and Emergency Shut Down # HU42VR weighs 6 lbs and measures 19" including the cord, with the body measuring 12" tall; it is also 6.5" at its widest point and 4" deep.
    view full answer...
  • Is The Power Watchdog Surge Protector App Free To Use?
    Hey Donald, Nope! The Bluetooth/WiFi app is free to download and free to use with the portable Watchdog Surge Protector # HU42VR. There will be a QR code on the front of the surge protector that you simply scan and it will get you all set up. I have used it myself and it is a fairly simple to use app. What kind of trailer/RV are you going to be using this on?
    view full answer...
  • Where Should The RV Surge Protector Be Plugged In When Using An RV Power Cord Adapter
    Hi Bernadette, You would want to plug your 50 amp to 30 amp adapter in to the power pedestal and then connect your Portable Power Watchdog Surge Protector # HU42VR to the adapter. Once the Watchdog lights show that the connection is good you can connect the trailer power cord to the surge protector. If you don't have a 50 amp to 30 amp adapter you can use the # A10-5030FBK.
    view full answer...
  • Will the Portable Power Watchdog Surge Protector HU42VR Send Notifications Over WiFi?
    Yes, that is correct Tom! So long as the Portable Power Watchdog Surge Protector item # HU42VR is connected to WiFi you'll get notifications assuming your phone also has signal. If you have any additional questions feel free to throw them into the comment box below.
    view full answer...
  • Recommended Surge Protector for 13.5K Furrion Chill Cube RV AC
    Hi Brian! One thing worth adding would be the Hughes Power Watchdog Surge Protector with Emergency Shut Down # HU42VR. This protects against power surges and automatically disconnects your camper if the voltage gets too high or too low. It plugs between the campground pedestal and your camper's power cord, so there is no permanent installation. The automatic shutoff is the feature I would look for instead of choosing something that only protects against surges. It handles that protection...
    view full answer...
  • Can the External 30A Portable Power Watchdog Surge Protector be Locked
    Hey Harvey! Definitely a valid question - I'd hate to invest in something and run the risk of something happening to it. The Portable Power Watchdog Surge Protector # HU42VR has a loop at the bottom of the door that covers the connection so you can lock your power cord to the protector. An alternative to this is to use the hardwire version of the Power Watchdog Surge Protector # HU77FR which installs on the inside of your trailer as opposed to the outside.
    view full answer...
  • What is the Joules Rating for the Watchdog Gen II Surge Protector
    Hey Becky, thanks for reaching out! The Portable Power Watchdog Surge Protector # HU42VR is the Gen II version and is rated for 2,300 Joules. The old Gen I 50A Watchdog was rated for 6,100 Joules which is I imagine where our mistake came from, and for that I apologize. I've got an update in to get the Joules rating corrected, so it should reflect that in the near future. Do you have any other questions for me?
    view full answer...
  • How Does the Portable Power Watchdog Surge Protector # HU42VR Connect to Wifi
    Hey William, you would actually use your phone to connect to the wifi signal that the Portable Power Watchdog Surge Protector # HU42VR puts out so that it communicates with it directly. So there doesnt need to be a data plan on your phone for a hot spot or wifi nearby for this to connect to. If you weren't near the surge protector there wouldn't be a way to communicate with it and see how it's functioning.
    view full answer...

Do you have a question about this RV Surge Protector?


Info for this part was:

Employee Jeff D
Installed by:
Jeff D
Employee Daniel M
Installed by:
Daniel M
Employee Jameson C
Expert Research:
Jameson C
Employee Dustin K
Video Edited:
Dustin K
Employee Chris R
Video Edited:
Chris R
Employee Wilson B
Updated by:
Wilson B
Employee Amanda M
Edited by:
Amanda M
Employee Cody B
Written by:
Cody B

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