Dual battery isolator kit keeps your starter battery protected while charging an auxiliary battery, so your lights, fridge, winch, and accessories stay powered without risking a no-start. This 12V 140A voltage sensitive relay (VSR) offers manual one-button control or automatic switching, plus an LCD screen for real-time voltage monitoring. Built for compact installs in off-road, RV, camper, truck, and marine dual battery systems.

Designed for drivers who need reliable accessory power without draining the main battery, this smart battery isolator helps maintain cleaner power management across your dual battery system. Use automatic mode for seamless daily operation, or switch to manual mode when you want direct control during recovery, camping, or maintenance. The sealed interior helps protect the electronics for demanding environments. Grab yours today and simplify dual-battery charging and protection on every trip.