Dual Battery Isolator Kit 12V - 140 Amp Voltage Sensitive Relay (VSR) for Dual Battery Setup

Dual Battery Isolator Kit 12V - 140 Amp Voltage Sensitive Relay (VSR) for Dual Battery Setup

• 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”, it’s 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 (1) 140 Amp voltage sensitive relay, (1) 20-ft red power cable, (1) 2-ft black ground cable, (2) positive marine-type brass battery terminals, (1) negative brass terminal, tinned copper lugs, heat shrink tubing, cable ties, and step-by-step instructions. Perfect for DIYers of all skill levels—just connect the power wire in, power wire out, and you’re ready to go!
• Trusted Performance with Warranty & Money-Back Guarantee – Every dual battery kit by KeyLine Chargers is backed by a 12-month industry-leading warranty. If you’re not 100% satisfied with your purchase, take advantage of our 30-day money-back guarantee—no questions asked! Drive with confidence knowing you have a premium battery isolator 12V kit keeping your power system running at full capacity.

<strong>Your search for the best automatic battery isolator is over! KeyLine Chargers 140amp Battery Isolator is the best value battery charger on the market. </strong> <ul> <li><strong>Zero Voltage Drop.</strong> Won't rob precious power from your batteries and electrical system, unlike heat sinking competitors'.</li> <li><strong>Small Convenient Size. </strong>Only about 2 inches tall, wide & deep (2.6" x 2.6" x 2") the isolater fits just about anywhere!</li> <li><strong>Fast & Easy Installation. </strong>Simple power wire IN, power wire OUT install. Comes with mounting plate/template.</li> <li><strong>IP65 Weather & Strong Vibration Protection. </strong>Suitable for all off-road vehicles and weather exposed applications.</li> <li><strong>Most Efficient Programming in the Business. </strong>Ensures your electrical system functions properly and batteries charge accurately.</li> <li><strong>Voltage Sensitive Relay (VSR). </strong>Specially designed for ATV, UTV, boats, RV's, campers, 5th wheels, off road vehicles, Rhino, Polaris, Artic, Cat, Etc.</li> <li>Comes With Necessary Hardware & Mounting Instructions</li> <li><strong>Dual Battery Voltage Sensitive Isolator User Guide</strong></li> <li><strong>Full 1 Year Warranty</strong></li> </ul> When it comes to SMART isolating... There is clear winner. The KeyLine Smart Battery Isolator works perfectly for all of your dual battery vehicles. When you're ready to go, don't get caught with a dead battery or left in the dust by inferior isolators! Do yourself a favor and <strong>buy one for a friend or a second vehicle</strong> that needs it - You'll thank us (and yourself) for the good decision later.<p> by <strong>KeyLine Chargers</strong>