KeyLine 140A Dual Battery Isolator Kit – 12V VSR

Upgrade your vehicle’s power system with the KeyLine Chargers Dual Battery Isolator Kit (12V, 140 Amp), featuring an advanced Voltage Sensitive Relay (VSR) for seamless battery management. This compact, 2.6” x 2.6” x 2” isolator ensures efficient power distribution between your main and auxiliary batteries without voltage drops or power loss—unlike traditional diode-based isolators. Ideal for marine, RV, off-road, and truck applications, it automatically activates at 13.3V and disengages at 12.8V, preventing battery drain and keeping your starting battery fully charged.

Built to withstand extreme conditions, this rugged kit is IP65-rated for water, dust, and vibration resistance, making it perfect for harsh environments. The complete DIY-friendly kit includes a 140A VSR, 20-ft power cable, 2-ft ground cable, premium battery terminals, tinned copper lugs, heat shrink tubing, and step-by-step instructions. Backed by a 12-month warranty and 30-day money-back guarantee, this reliable battery isolator ensures uninterrupted power for all your adventures.