What is the Difference Between the Power Watchdog # HU67FR and # HU42VR?
Updated 05/29/2026 | Published 05/23/2026
Products Featured in This Question
Question:
What is the difference between the Power Watchdog Surge Protectors: HU67FR and HU42VR? Thanks.
asked by: Kevin G
Expert Reply:
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 weather protection and a higher 3,000 joule surge protection rating.
The # HU42VR is the earlier generation version and uses Bluetooth only, so you need to be within Bluetooth range of the RV to monitor it through the app. It still offers excellent protection with automatic shutoff during unsafe voltage conditions, but it has a lower 2,300 joule surge protection rating.
Both are great options, but if you want the newer design, remote Wi-Fi monitoring, and the higher surge protection rating, I would go with the # HU67FR.
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Charles H.
5/28/2026
The Watch Dog has performed very well. Particularly liked the Bluetooth and WiFi capabilities. I used at on my 30 amp outlet and while camping.
Kate F.
5/29/2026
Kevin
5/28/2026
The Watchdog has saved our trailer twice in one month. First, the so-called electricians ran a remote box from the panel. Instead of bringing out 120v they mistakenly wired for 240v. The Watchdog didn't like that. Second, when they supposedly rewired it for only 120v they mistakenly switched the hot and neutral to the back of the 30amp outlet. The Watchdog caught it again and the ability to see this on my phone via Bluetooth was awesome.
Kate F.
5/29/2026
Chris F.
5/28/2026
I use the HU67FR watch dog, even though my camper has a built in surge protector still i use the watch dog for added protection
Kate F.
5/29/2026
David
5/28/2026
I've been happy with my power watchdog. I feel very secure that my RV is protected. I have the earlier generation version with the RV receptacle inside the unit under a cover, but the picture of the newer Generation 2 model looks like the RV receptacle is out in the open. Not sure why they changed that. How would the connection be protected from rain?
Kate F.
5/29/2026
Product Page this Question was Asked From
Portable Power Watchdog Surge Protector with Bluetooth, WiFi, and Emergency Shut Down - 30 Amp
- RV Surge Protectors
- Surge Protector
- 30 Amp
- Portable
- Automatic Shutoff
- Bluetooth Monitoring
- WiFi Monitoring
- Hughes Autoformers
more information >
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Donna
5/28/2026
I love my power watchdog! Purchased it because we bought a new Rockwood Mini-lite and I wanted to protect the 12volt system in our unit. I know of other people that had issues with power in campgrounds and didn’t want to experience that. An after thought - I always lock up my watchdog at campgrounds because I don’t want it stolen.