KeyLine Chargers 12V 140 Amp Dual Battery Smart Isolator VSR - Voltage Sensitive Relay Designed for ATV, UTV, Boats, RV's, Campers 5th Wheels Off Road Vehicles Rhino Polaris Artic Cat ETC
Key features
- •ZERO VOLTAGE DROP: Forget the traditional diode relays and so-called "solid state" devices that can rob you of almost 2 amps of output voltage! The Keyline Dual Battery Isolator is the only unit designed with cutting edge programming to deliver optimum performance - with ZERO sacrifice. This compact battery isolator was built ultra-small (2.6" x 2.6" x 2") to fit almost anywhere! A perfect fit under the hood to get close to your dual batteries.
- •VOLTAGE SENSITIVE RELAY: The KeyLine Automatic 140 Amp Dual Battery Isolator is all you need to charge Two Battery Systems. Voltage Sensitive Relay (VSR) cuts in at 13.3 volts and cuts out at 12.8 volts to ensure your primary battery is always charged and ready to start your vehicle. It's like having two separate power sources for each battery while only having one alternator!
- •RUGGED DURABILITY: Unlike other isolators on the market, the KeyLine Automatic 140 Amp Dual Battery Isolator is IP65 Certified. This International Protection rating means that your KeyLine isolator is safe for use even for your off-road needs in dusty, wet and unexpected extreme weather environments. Great for extreme vibration applications as well.
- •EASY-TO-USE: The 140 Amp Dual Battery Smart Isolator comes with mounting plate and hardware. Does not include installation wires. Easy-to-follow directions for the most novice DIYer. What could be easier? **If you need installation wiring, see Dual Battery Kit or ATV/UTV Kit.
- •BUY WITH CONFIDENCE: Every 140 Amp Dual Battery Isolator is backed by an industry leading 12-month warranty. If you are not 100% satisfied with your purchase, simply take advantage of the No Questions Asked, 30-Day Money Back Guarantee!!
- •Zero Voltage Drop. Won't rob precious power from your batteries and electrical system, unlike heat sinking competitors.
- •Small Convenient Size. Only about 2 inches tall, wide & deep (2.6" x 2.6" x 2") the isolater fits just about anywhere!
- •Fast & Easy Installation. Simple power wire IN, power wire OUT install. Comes with mounting plate/template.
- •IP65 Weather & Strong Vibration Protection. Suitable for all off-road vehicles and weather exposed applications.
- •Most Efficient Programming in the Business. Ensures your electrical system functions properly and batteries charge accurately.
- •Voltage Sensitive Relay (VSR). Specially designed for ATV, UTV, boats, RV's, campers, 5th wheels, off road vehicles, Rhino, Polaris, Artic, Cat, Etc.
- •Comes With Necessary Hardware & Mounting Instructions
- •Dual Battery Voltage Sensitive Isolator User Guide
- •Full 1 Year Warranty
KeyLine Chargers 12V 140 Amp Dual Battery Smart Isolator VSR - Voltage Sensitive Relay Designed for ATV, UTV, Boats, RV's, Campers 5th Wheels Off Road Vehicles Rhino Polaris Artic Cat ETC
List Price: $123.63$111.27DEALYou Save: $12.36 (10%)
Free shippingFree Returns – 30 daysFree Order CancellationSecure Payment2–3 Days DeliveryGet It June 25, 2026In Stock (1)No marketing spamNo account requiredFulfilment by FedEx / Amazon / UPS / ShipwirePayPal / Card Buyer Protection
Customer Reviews
Reviews sourced from verified Amazon purchasers4.2
out of 5
Based on 10 reviews
5★
90%
4★
10%
3★
0%
2★
0%
1★
0%
Service was great but I have returned the item as I found ...
Digby Macdonald✓ Verified Purchase•February 19, 2018
Service was great but I have returned the item as I found that the existing isolator in my boat was fully functional. When the existing isolator packs up, I will reorder the item.
Five Stars
Rocky✓ Verified Purchase•February 17, 2018
Install and forget it.
Great kit
mark 73✓ Verified Purchase•February 11, 2018
Nice kit and small isolator so u can easily find a mount spot
The only regret is not installing this sooner. We ...
Jeffrey Heitzenrater✓ Verified Purchase•November 10, 2017
The only regret is not installing this sooner. We run a dump trailer business and this keeps pur batteries charged 100%.
Great isolator. Works great in 2016 Polaris Ranger 900-5 Crew.
Earl B. Hickerson✓ Verified Purchase•June 17, 2017
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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