Dual Battery Isolator Kit 12V - 140 Amp Voltage Sensitive Relay (VSR) for Dual Battery Setup - Automatic Disconnect Switch for Car, Truck, RV, UTV, ATV, Marine
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Availability:
In Stock.
Arrives
Monday, Jun 8
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Size: 140 AMP ATV/RV
Features
- Advanced Dual Battery Isolator 12V Kit Designed for superior performance, this dual battery kit ensures efficient power distribution between two batteries without voltage drops. Unlike traditional battery isolator diodes, this automatic disconnect switch eliminates power loss while maintaining a seamless connection between your primary and auxiliary power sources. Compact at 2.6 x 2.6 x 2, its perfect for under-hood installations or as part of a battery relocation kit.
- Smart Voltage Sensitive Relay (VSR) for Optimal Charging Featuring a 12V dual battery wiring kit, this system automatically activates at 13.3V and disengages at 12.8V, ensuring your starting battery remains fully charged. Whether you're installing a marine dual battery kit for your boat, a dual battery kit for truck applications, or need a battery isolator 12V kit for off-grid power, this setup prevents battery drain and guarantees reliable performance.
- Built for Extreme Conditions & Rugged Durability Engineered for off-road adventures, marine use, and daily driving, this dual battery isolator kit is IP65-rated for water, dust, and vibration resistance. Its solid-state design ensures durability, making it an excellent choice for automotive, RV, UTV, and marine battery isolator needs. Whether battling tough trails or navigating open waters, count on this dual battery wiring kit to provide uninterrupted power.
- Complete Dual Battery Wiring Kit for Easy DIY Installation No complicated setup required! This battery isolator kit includes a 140A voltage sensitive relay, 12" red power cable, 24 red power cable, 12" black ground cable, tinned copper lugs, marine-grade brass terminals, heat shrink tubing, cable ties, and an easy-to-follow install guide. No complex wiring or diodes requiredthis is a plug-and-play solution for any 12V dual battery wiring setup.
- Trusted Performance with Warranty & Money-Back Guarantee Every dual battery kit by KeyLine Chargers is backed by a 12-month industry-leading warranty. If youre not 100% satisfied with your purchase, take advantage of our 30-day money-back guaranteeno questions asked! Drive with confidence knowing you have a premium battery isolator 12V kit keeping your power system running at full capacity.
Product Dimensions: 1.97 x 1.97 x 1.97 inches
Item Weight: 8 ounces
Manufacturer: KeyLine Chargers
Item model number: Iso-Pro140
Is Discontinued By Manufacturer: No
Date First Available: April 28, 2015
Frequently asked questions
If you place your order now, the estimated arrival date for this product is:
Monday, Jun 8
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.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
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Top Amazon Reviews
Size: 140 AMP ATV/RV
Ive had this in my Polaris ranger 2016 900-5 crew, for about 8 months. I have 2, 1200 Odyssey batteries installed. This thing works like a champ. It passes the charge to the battery that needs it the most. I tax my system more than most people ever will, and this isolator does more than I need it to. You have to understand your setup and how it all charges or you wont understand how this thing works. I have 2, 54in curved 4D light bars, and 2, 50in curved 4D light bars, along with 2, 7in light bars, and in cab, mulit color lights. I can run all night on my setup. I can hunt 3,000+ acres, for over 8 hours without any issues. I can hear the isolator clicking back and forth, and I can watch my voltage move around. I never drop under 10 volts, on a full load, and that is after all night of hunting. It would of been nice to have longer and better neg and pos. cables, but because of all the other work done to the Ranger, I did have better cable laying around. Others will not have the same luck. So a tip to the seller. Just give the better, longer cables. It wont cost you that much more, and honestly even if it does, I would of paid to have the better cables. Outside of that, I didn't buy this for the cables. I needed the isolator, and it is great quality, and works flawlessly.
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Reviewed in the United States on June 19, 2017 by Brantley Hickerson
Size: 140 AMP ATV/RV
Purchased this to add dual battery capability to my Polaris Rzr. Easy to install, good directions. Only caveat, placing it where it says in the directions, double check to make sure the seat fits back in place before putting in the final screws. If you dont, a good chance it will interfere with the seat. It contained everything I need to make the installation simple and easy and not having to chase for any parts.
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Reviewed in the United States on October 25, 2016 by Amazon Customer
Size: 140 AMP ATV/RV
Worked well for a month or so then became unstable and caused system problems with my Polaris Ranger. Polaris diagnostics finally linked it back to this product which I had them install.
Reviewed in the United States on October 12, 2016 by Joe Stout
Size: 140 AMP ATV/RV
I used this for my custom dual battery set up for my rzr. All wires were long enough and had everything I needed.
Reviewed in the United States on January 13, 2022 by Gibrahm Medina
Size: 140 AMP ATV/RV
After much research I purchased the unit based on the good reviews. I noticed when first connecting the unit there was an audible click like a relay, I thought nothing of it at the time assuming it just initialized the unit. Four days later I am left stranded because it drained the starter battery. I charged the battery for several hours and monitored the voltage, but when the charger was taken off there was a parasitic voltage drain pulling the battery back down by .01 volts about every 5 seconds or so. While investigating further with the vehicle ignition off I noticed the very small almost non-visible red LED was always on which indicates the device is in CUT IN mode @ 13.3v, this would make sense normally because my now fully charged starter battery was over that. I disconnected the thin ground wire and heard the click again but now the starter battery voltage stayed steady at 13.15v with no drain. The device is supposed to CUT OUT at 12.8v so the alternator would direct power back to the starter battery, so I would assume when the vehicle was turned off it would CUT OUT so as not to drain the starter battery, this was not the case and it continued to drain the battery. Hopefully I can contact the seller directly for advice but as of now the only option is to install a manual isolator switch to power off this isolator. For reference I am an auto mechanic & electrician, all I can say is buyer beware. UPDATE 9/25: After contacting the vendor and reviewing my installation it was apparent that I had made a mistake. Yes this device could drain your starter battery if installed incorrectly, I corrected my installation and the unit seems to be functioning as it should.
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Reviewed in the United States on September 2, 2019 by John Fixit
Size: 140 AMP ATV/RV
Great product worth wonderful instructions. One revision they can add to the diagram is that you don't necessarily need to run a cable directly from the battery to the auxiliary battery. If you are running yards in a battery to the rear of the vehicle you can just ground the auxiliary battery to the chassis and the system will still function properly. It's very efficient and charges perfectly. The quality of the kit for insulation was amazing. I would happily purchase another unit from them.
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Reviewed in the United States on September 29, 2016 by SalWHanna
Size: 140 AMP ATV/RV
Does exactly what it is supposed to. We used this is the construction of a power supply box that would accept charge from a battery charger, and alternately open up to charge from and alternator source. It worked exactly within its specs, and can be used for heavy amperage applications.
Reviewed in the United States on December 17, 2019 by Amazon Customer
Size: 140 AMP ATV/RV
Excellent product for duel batteries in Polaris RZR. One battery for the accessories such as lights and wench, which keeps the main battery fresh at all times.
Reviewed in the United States on October 1, 2016 by Mrs. Susan M Collier