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

About this item

• 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.
• 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.
• 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.