Search  for anything...

SureFire Stove Sentry 512 For Pellet Stoves, Harman and more By Sec America

  • Based on 80 reviews
Condition: New
Checking for product changes

Notify me when this product is back in stock

$499.99 Why this price?

Buy Now, Pay Later


As low as / mo
  • – Up to 36-month term if approved
  • – No impact on credit
  • – Instant approval decision
  • – Secure and straightforward checkout

Ready to go? Add this product to your cart and select a plan during checkout. Payment plans are offered through our trusted finance partners Klarna, PayTomorrow, Affirm, Afterpay, Apple Pay, and PayPal. No-credit-needed leasing options through Acima may also be available at checkout.

Learn more about financing & leasing here.

Free shipping on this product

This item is eligible for return within 30 days of receipt

To qualify for a full refund, items must be returned in their original, unused condition. If an item is returned in a used, damaged, or materially different state, you may be granted a partial refund.

To initiate a return, please visit our Returns Center.

View our full returns policy here.


Availability: Unavailable
Fulfilled by Amazon
Available payment plans shown during checkout

Brand: SEC America


Material: Metal


Color: Black


Assembly Required: Yes


Ventilation Type: Direct Vent


Brand: SEC America


Material: Metal


Color: Black


Assembly Required: Yes


Ventilation Type: Direct Vent


Fuel Type: Pellet


Portable: No


Mounting Type: Freestanding


Manufacturer: SEC America


UPC: 701980444814


Global Trade Identification Number: 14


Package Dimensions: 17.8 x 13.5 x 5.4 inches


Item Weight: 12.42 pounds


Item model number: SF512


Is Discontinued By Manufacturer: No


Date First Available: June 23, 2022


Frequently asked questions

This product is currently out of stock. Please check back later for shipping info.

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

  • Klarna Financing
  • Affirm Pay in 4
  • Affirm Financing
  • Afterpay Financing
  • PayTomorrow Financing
  • Financing through Apple Pay
Leasing options through Acima may also be available during checkout.

Learn more about financing & leasing here.

Top Amazon Reviews


  • Works well, but expensive
I use it for my pellet stove and luckily i haven't lost power yet but i do regularly test it my unplugging the power cord and it kicks on like it should. Its expensive but you really need one if you have a pellet stove. Without one if power goes off, the fire in your stove continues to burn whats in the pot but there is no power to the blower fan to pull the smoke outside so your home will fill with smoke. Keep in mind you will need to buy a deep cycle battery for 130 which will add to the cost. I advise going with a the largest battery that makes sense for you costwise. ... show more
Reviewed in the United States on December 16, 2019 by Andrew Viens

  • Easy and relieving.
This DOES work for the Englander in my living room. Easy to understand and hook up. Straight-forward protection. Takes all of the fear away from power outages, as pellets are our primary heat source. A five hour outage last winter in Northern Maine was a lot of smoke, and almost a frozen crisis. This year we can take 9 to 18hrs off grid, no sweat. Hands down, one of the very best tools I have ever bought! ... show more
Reviewed in the United States on December 9, 2021 by Gosh

  • Works on the Harman P68 pellet stove
I hooked it up as described in the included paperwork with little to no difficulty (it is a solid piece of equipment that feels heavy for its size). The battery leads from the SureFire 512 had the 3/8" (?) ring type terminal lug attachments on them (not the alligator spring clips and not the fat 19 mm battery post connectors). The SureFire 512 ring terminal lug attachments slid right down onto the threaded posts that (luckily for me) were on the battery that I bought, that made the connection easy and secure with the nuts that came with the battery (I think the ring lugs on the SureFire 512 would probably work just fine with a battery that uses bolts too). I tested the Surefire 512 as the power source for our Harman P68 pellet stove that was in full operating/heating mode (about 15 minutes into the burning cycle). When I unplugged the wall power supply feeding the SureFire 512, the SureFire 512 automatically kicked in and kept the Harman P68 fans blowing and the flame burning - just as advertised. We will find out how long the battery I bought will keep this stove running when the power goes out for real. For now, we are happy to have spare hours to get the generator up and online while we still have heat functioning inside. ... show more
Reviewed in the United States on November 8, 2022 by K.W.

  • Does not provide zero interruption
The problem is that in case of a power interruption it doesn't take over instantly. There is a 1'4 second gap. We're on a thermostat controlled Harman (new) so the stove shuts down and you have to reset it. That requires you to be present when the outage occurs or else the stove will shut down and you will get smoke into the room. They advertise "no interruption" which isn't the case. ... show more
Reviewed in the United States on September 15, 2022 by Ruth Ruth

  • We needed this.
Works when the power quits, perfectly.
Reviewed in the United States on February 27, 2024 by Amazon Customer

  • Great investment for a power outage
Product is a little pricey, but it works great. Our power goes out intermittently and frequently. It has already proven itself worthy and saved us from a smoke seepage from a sudden outage as well as having continued heat during an outage. Easy to hook up. I would recommend getting marine battery terminals for a secure connection. ... show more
Reviewed in the United States on January 10, 2020 by M. Smith

  • Using for a Harman P43 stove
I've connected the inverter to a battery and recently tested a loss of power event with my Harman P43 stove. It took less than a second for the inverter to kick on and make use of the battery. I asked both my stove vendor and the installer if they felt the inverter/battery would be appropriate for this stove and both saw no issue. The inverter doesn't use a pure sine wave and the Harman stove requires such a signal, but my understanding is this inverter is specifically designed via collaboration with Harman to ensure the signal doesn't harm my stove. ... show more
Reviewed in the United States on November 28, 2022 by Matt

  • This product will not work on our P-43-C Harmon Pellet Stove
Our stove is a pure sine wave stove, this is a new model Harmon Pellet Stove. This product is a modifies sine wave and only works on modified sine wave pellet stoves. Per the Harmon web site, the stove could be adjusted to work with this product by a certified Harmon installer but in searching a 300-mile radius of our home in Northern California (we included Northern Nevada in our search) we could not find any Harmon installer that knew how to do this. Before you purchase this product, please verify with SureFire and your pellet stove manufacturer that this product will work with your pellet stove. ... show more
Reviewed in the United States on February 8, 2022 by Vicki M Shumaker

Can't find a product?

Find it on Amazon first, then paste the link below.