Dual Battery Isolator Kit 12V 140A VSR, 6m Cable

Dual battery isolator kit keeps your starter battery protected while charging an auxiliary battery automatically for reliable power on the road or water. This 12V split charge relay uses a voltage sensitive relay (VSR) to connect at 13.3V and isolate at 12.8V, so accessories run from the leisure battery without risking a no-start. Built for RV, camper van, 4x4, marine, and workshop installs with a compact, sealed design.

Set up a dependable dual-battery system for fridges, lights, winches, inverters, or onboard electronics without constantly switching cables. The voltage-sensing logic connects only when charging voltage is present, then separates batteries after shutdown with a short delay to avoid nuisance cycling. Designed for cars, trucks, caravans, RVs, boats, yachts, ATVs/UTVs, and off-road builds where wiring needs to stay organized and protected. Grab yours today and finish your split-charge install with confidence.