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12V 140 Amp Dual Battery Isolator Voltage Sensitive Relay (VSR) Pro
We know you have many choices when it comes to truck parts, our mission is to always strive to offer the best quality parts at the best prices! We have over 20 years of experience in the industry and strive to keep our customers satisfied and coming back!
Henry Fiddler
Reviewed in the United States on September 17, 2024
This is my third time setting up a truck/camper with an isolator. The first two were with those bulky ones with diodes, voltage drops and a big ugly heat sink. This time I thought I'd try a starter solenoid. I bought a solenoid here on Amazon and there was a scary warning about it getting hot. Some customers had a problem with heat but others didn't so I thought I'd give one a try. WRONG! Within 5 minutes it was too hot to touch. Then I found this isolator for a similar price. Returned the solenoid, bought and installed this isolator. These isolators that function off battery voltage must be new since I never heard of them before. Another nice thing is you don't have to find a key-on ignition source to splice into ... typical with other isolators and solenoids. My only complaint is there were no installation instructions in the package. There is an extra skinny black wire coming out of the back of this unit and I had no idea what it is or what to do with it. Turns out it's just a ground wire that can be hooked up to any ground in the vehicle. Very happy with this isolator and for the price, I'm thrilled! :)
wise_monkey
Reviewed in the United States on February 4, 2021
Installed the relay to replace my stinger isolator. Started up the car, measured the voltage and confirmed there was ~14.1-14.2 volts going into the relay from the starter battery, but 0 volts from the relay to the 2nd battery. Tried to isolate issue by checking if ground wire (the black wire that's preinstalled)/bad connections or cables were the issue but no problems there. It's looking like the item itself was defective, contacted customer support and may update if/when they respond.TL;DR=unit doesn't turn on although it's connected properly and has power going in via the battery and ground but no power going out.
Matt C.
Reviewed in the United States on March 10, 2020
Perfect product for the dual buttery set up in my 2019 turbo rzr.
DIY__Stu!
Reviewed in the United States on February 10, 2020
Once fully charged this device will drain one of the two batteries until it hits the cutoff voltage which is at the limit of maybe starting the vehicle.Should increase the SHUTOFF voltage limit.
Harris HVAC & Refrigeration
Reviewed in the United States on January 28, 2020
Installed it in my 97 ford expedition to have a secondary battery for accessories. Works great.
Stephen Wathne
Reviewed in the United States on July 2, 2019
Seems to be working very well and is super easy to install. Doing a great job keeping both batteries charged.
Customer
Reviewed in the United States on December 9, 2019
Think the product will work fine I just have not had a chance to put it to the test yet.
petey
Reviewed in the United States on December 7, 2019
ease. dual battery for utv
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