Facon 2Packs 7-1/4" x 25" RV Tank Heater Pad with Thermostat, CW-ST725 12V Water Tank Heating Pads, Prevents Freezing for Fresh, Grey, Black Water Tanks up to 50 Gallons, QAI Certified

I ordered these (2) heating pads after watching a Youtube video regarding keeping LiFePo batteries above freezing, as this is required of these batteries. I bought 2 of these heading pads, and have installed 1 of them directly to the side of my 4x100Ah battery bank (using the adhesive backing to attach them directly to the sides of the battery. Even though the pads come with a thermostat that turns them on when temps dip below 40F, I installed the pads through a temperature controlled relay (https://www.amazon.com/dp/B09531FDPN?psc=1&ref=ppx_yo2ov_dt_b_product_details). So far, the temperature within my RV has dipped below 20 degrees, and the batteries have remained at about 38 degrees. The heating pad is drawing about 70 watts when it is activated. If the 1 heating pad is not enough to keep the bank above freezing, I will connect the 2nd pad to the opposite side of the battery bank (then will draw 140 watts). Trying to avoid running down my battery bank, in the process of keeping it alive. So far, the heating pads have worked well. I hope to give another followup in the Spring.

Shipped to the UK. Perfect for my Camper Van grey water tank for in the winter months. I got two so I always have a spare.

DO NOT BUY! This company does not stand behind their products. I bought these for my RV tanks and one did not work and my tank froze and is now cracked. The company says that they will not pay to fix it because their product failed. Poor business practices when a company wont stand behind their products Yes I installed them properly I have been doing this kind of work all my life. UPDATE! After posting this review I was contacted by the owner of the company. After a short phone conversation he said that they will compensate me for the damage is done to my tank. Frank was very nice and wanted to do the right thing. I want to be very clear I have used dozens of their tanketers and have only had 2 fail and only one caused damage. This company makes a quality product and they stand behind it when something happens and at the end of the day that's what really matters. They paid to replace my grey water tank that was damaged and apologized numerous times for the inconvenience. Thank you for doing the right thing and standing by your product. I will continue buying their products. Thanks guys!

Very much recommended for campers without heated tanks. We also got a set for the front steps which get very slick when there is any snow/ice. They are on a thermostat which kicks on around 40 degrees F. I wired 8 of them in to an 80A relay on a 40A fuse in parallel. Combined consumption is around 36A when all are on. You MUST do this in parallel with the correct relay and fuse to protect yourself and property. Pulling too much power through the tiny 20 gauge wire from the master switch will get very hot if not done correctly. Be sure to use around 12 gauge wire to and from the relay to stay cool and accept the load. If you do not understand what this review is about, please do not wire these yourself. Playing with heating pads can be dangerous in close quarters.

Heaters worked great, prepped area with running alcohol, and then applied the adhesive. Draw exactly their rated current and switch on and off appropriately. Used on 3- 25gallon tanks and 2-38gallon tanks. No freezing so far down to 20 degrees. Wires seem to be good quality, appeared to be pure copper and not copper clad aluminum (CCA) which is greatly appreciated in this application. Just seem a bit more expensive. Would like to see them come down 5-10$

One heater was DOA, the other works perfectly. The one that doesn't work was attached to my black tank, so it's VERY important that it works. I also confirmed that voltage was reaching the heater pad, so it's definitely the pad itself. Fortunately, I noticed before I absolutely needed it to function. Unfortunately, it was slightly after the return window because that's when the outside temperature started getting below freezing. Filing for a return/replacement was pretty convoluted, but I managed to get a refund by contacting Amazon (not the seller or manufacturer as is stated in a few places). I also have to return the faulty heater, which is probably going to end up in pieces due to the quality adhesive they use. Replacing the faulty heater apparently isn't an option, and there's no reasonable way to contact the manufacturer to even figure out what the warranty is. They don't have a website or any other contact info, just a blurb saying that you can have the warranty info MAILED to you if you send a self-addressed, stamped envelope. Ridiculous. SO make sure you test the heater BEFORE attaching it. Once it's attached to the tank, you won't know if it works until you need it to work. Just connect it to a battery and stick it in the freezer or something to make sure it turns on.

Perfect, just what I needed.

This item was used in a Class C motorhome with batteries located under the stairs, which are in an heated area. The heat pad was tested in an exterior temperature of 33 degrees F and kept the batteries at a constant 57 degrees F. WARNING: The sticky side is extremely sticky and I recommend peeling off the protective covering only a few inches at a time as you adhere it. Once it is on, it is on! I recommend this item.

I bought two in November. I installed them in my RV under the batteries (lifep04, not lead acid or anything else caustic). They worked fine for 3 weeks, but now one has failed. It switches on for a second every 10 seconds and then switches off. Its -8 in the battery bay, so they should be on solid. I suspect the temperature sensor is bad, and I can smell a "burnt electrics" odor. I'm just glad not to have had a fire. wcn Addendum: I removed the batteries and found that the rear pad had melted under them and nearly caused a fire. I would say not safe to use anywhyer but external metal tanks which are never empty. This could have burned my RV or damaged thousands of dollars of batteries.

Rated low as I purchased two pads. After the installation and sticking the pads to the tanks, I have found only one works, the other is faulty. Since it is stuck on and cannot be removed, it was a waste of money. I will now need to try figure out next steps. Suggest you test the operation before you Install, a bit difficult as they are thermostat controlled and you have to cool them down to get them to operate.

I installed these pad heaters on my RV black and grey tanks, but haven't really had time to actually test them yet as they have a built in thermostat that turns on at -5C, but it's still too warm yet..