Review on 🔋 SGP32 Battery Relay Isolator by Stinger by Ted Higdem

I was looking for a good quality relay to use in my Chevy truck for auxiliary battery isolation. My stock relay failed, but it was 30 years old. The auxiliary battery is used as one of two batteries in my RV pickup, one in the engine bay and the other in the RV. I tried the Delco OEM relay, but when I bench tested it before installing it, I found that the coil resistance of the relay was only 20 ohms compared to my original which was 50 ohms. When the relay activated, the coil drew over 0.5 amps compared to the original's 0.2 amps. After activating the Delco relay for a few minutes, it felt quite hot. Although the relay is designed to isolate the battery, I didn't feel comfortable that it could be reliable in the long run. After about an hour the relay has become too hot to touch and the battery disconnect relay sometimes has to work many hours a day. I chose the Stinger SGP32 decoupling relay and found that its coil draws only about 0.3A (30 ohms), it only gets warm after a few hours on the bench due to its size which can dissipate heat. I think the stinger relay is better than the delco relay, but the stinger relay is very noisy and takes up too much space in my engine bay. While both this Delco relay and the Stinger relay look like high quality products, I found the best solution was a nifty product from Keyline called the Smart Battery Isolator which really impressed me. I returned the Stinger relay to Amazon and the Keyline isolator works great.