Model # THP108

Internet #202216506

Reliance Controls PowerBack Utility Power Return Alert

Reliance Controls

PowerBack Utility Power Return Alert

$33.42 /each

Frequently Bought Together

Product Overview

The PowerBack is intended to be installed on a manual transfer panel or generator-ready load center. During a power outage, when the main breaker has been turned off to allow the generator to provide emergency power to the panel, the PowerBack can be activated and will emit a pulsing 105dB alarm when the power outage ends and utility power is again available. The PowerBack installs in a 1/2 trade size knockout in the panel within 20 in. of one of the utility hot legs. It includes an eight-inch current sensing antennae at the end of a 22 in. jacked lead. When wrapped around one of the hot legs to the main circuit breaker, the antennae will detect the returning utility current and activate the sonic alert.

  • Lights for "System Armed" and "Low Battery"
  • 9 Volt battery not included
  • UL Listed
  • 5 year warranty

Info & Guides

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Warranty / Certifications

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Customer Questions & Answers

How does the sound turn-off after it senses power?

How does the sound turn-off after it senses power?
Asked by: DW
The user must manually turn the alert off. There is a switch on the side.
Answered by: RelianceControlsAnswers
Date published: 2017-04-03

Suggestion for an suitable enclosure for mounting to an outdoor main panel?

My panel is on the exterior of the house. I'm looking for a box I can mount to the bottom of the panel via one of the knock-outs that will enclose and protect the Powerback device from weather.
Asked by: bgeery
Yes, use a suitable weather enclosure as described for a duplex receptacle (Duplex mentioned only to reference size of box) , but enhance the audibility by drilling multiple holes in the side(s) of the box to allow sound transmission as in a speaker grill cover. To reduce rain entry drill holes on the normally down-wind side, keep the holes to a small diameter, and drill at a 45 degree upward angle into the box to further preclude water entry. Also, don't forget weep holes in bottom enclosure. Wish you well on your project.
Answered by: hbwink
Date published: 2016-07-31

When will this item be back in stock?

Asked by: PGOGO
Suggest you purchase on-line via and pick-up at your local store. That's how I got mine, took about a week.
Answered by: NHMike
Date published: 2015-09-17

Is these in stock now?

Asked by: Anonymous
Check at Home for availability of this item.
Answered by: HiTechRuss
Date published: 2015-09-17
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Customer Reviews

PowerBack Utility Power Return Alert is rated 4.5 out of 5 by 40.
Rated 5 out of 5 by from I am a Master Electrician and have installed several of these when I install an generator interlo... I am a Master Electrician and have installed several of these when I install an generator interlock device to connect a portable generator for emergency backup. The "PowerBack" sounds an audible alert when utility power is restored so the homeowner knows to switch back to utility power.
Date published: 2016-12-07
Rated 5 out of 5 by from Easy to install and loud enough to be heard from the main floor when installed in on the panel in... Easy to install and loud enough to be heard from the main floor when installed in on the panel in the basement .
Date published: 2017-01-03
Rated 5 out of 5 by from Simple to install and does what it says For other reviews which say this is not loud enough I think they must have a high tolerance for loud noise. When I set this thing off the alarm blew my head off so I was suprised that many think that it is not loud enough to hear. Of course if you have a huge house and the panel is very far away I can see that it may be a problem hearing the alarm but you have to be realistic. I found this unit as loud as a smoke alarm. At least to me. Installation was a breeze and so far it seems to work. I won't know until the power actually goes off. But when the power is on this alarm sure does let you know. This product is exactly what I was looking for!
Date published: 2013-03-23
Rated 5 out of 5 by from Works as advertised! Unit works great. Wrap around hot leg with electrical tape. This gives a tight fit. Sonalert is loud and I can hear it well at all locations. Added benefit is a magnet is on the back of the unit so you can place it on the box if the box is recessed. Good pricepoint as well.
Date published: 2013-06-18
Rated 5 out of 5 by from Just what I needed, great price and product I recently back fed my load center with a generator hookup and interlock switch (also bought at home depot) and I had no idea how I was going to tell when the power came back. I didn't know these things even existed until I was buying the interlock switch and saw this under the "customers also bought ...." section. This thing works great, install it in a knockout, ground it and wrap the antenna around one of the main feeds and your done. When it's enabled it beeps when power's present. I've seen others say it isn't loud enough, but mine is extremely loud. Ear piercing in fact. The price was better then amazon and the product itself seems well built. What more could you want.
Date published: 2013-10-09
Rated 5 out of 5 by from Great Value ! Easy to install and works great. I did not have room to mount on top of the power panel as suggested due to all the wires, so I mounted mine on a 3/4" PVC LB that I mounted on the side of my power panel at a knockout within easy reach. When activated by a power return it is VERY LOUD and can be heard throughout the house. So loud it almost hurts while getting to it to turn it off. I used to watch for neighbor's lights to come back on, now I know immediately when I can switch back from the generator.
Date published: 2013-12-10
Rated 5 out of 5 by from great add on to generator set up ordered through and had delivered to store .was easy to install i removed the panel and wrapped the antenna around the hot (main wire ) . but be very care full even if the main breaker is switched off the wire you will be wrapping the antenna to is always hot DO NOT attempt it if you are not confident you can do this. BUT overall it was not that hard to install i did use zip ties to secure the antenna to the hot wire . also 9 volt battery is needed and not included. then switch to on and loud alarm goes off .. as far as sound volume it is loud sounds like a loud smoke detector . over all very easy to install and well worth it for letting you know when power has been restored INSTEAD of burning unnecessary fuel from the generator.could actually pay for itself by saving fuel money
Date published: 2015-10-01
Rated 5 out of 5 by from Great device When the power is out and a generator is used to power the house it is not clear just when power has been restored. This device is the answer.
Date published: 2015-12-22
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