12V Split Charge Relay Kit 140A Smart Battery Isolator System

Keep your starter battery protected while powering everything else you need. This 12V split charge relay kit automatically manages charging between your main and leisure batteries, so you never get stranded.

Drive, charge, and stop without worrying about draining your vehicle’s main battery. The system handles it all in the background, giving you reliable power wherever you go.

Automatic battery protection with zero guesswork

✅ Keeps your starter battery safe so your vehicle always starts

✅ Charges leisure batteries while the engine runs for continuous power

✅ No ignition feed needed, making setup simpler on modern vehicles

✅ Handles up to 140A for dependable performance across setups

✅ Pre-crimped cables reduce install time and wiring mistakes

✅ Complete kit included so you can install without extra parts

The intelligent voltage sensing relay detects when your vehicle is charging and automatically connects your batteries. Once the engine stops, it isolates them again. This prevents your leisure battery from draining your starter battery.

Installation is straightforward. The kit comes pre-assembled with terminals and includes clear instructions, so you can connect your starter and leisure batteries with minimal effort. No need for complex wiring or ignition feeds, making it suitable for modern vehicles with CANBUS systems.

This kit works across a wide range of setups including camper vans, motorhomes, 4x4s, boats, and mobile workspaces. With 3 meters of pre-prepared cable split into multiple leads, plus fuse holders, fuses, and mounting accessories, everything is included to get your system running cleanly and safely.

Compared to piecing together separate components, this setup saves time and avoids compatibility issues. Pre-crimped cables, included fixings, and organized wiring help you achieve a tidy, reliable installation from the start.

Keeps both batteries managed automatically without manual switching.

Maintains stable charging performance during vehicle operation.

Pre-crimped cables simplify installation and reduce setup time.

Included fuses add protection for safer power distribution.

Clear wiring layout helps achieve a clean installation.

Connects easily between starter and leisure batteries.

All essential parts included for a complete setup.

Secure mounting ensures reliable daily operation.

Organized wiring keeps your system neat and efficient.

Everything included so no extra parts are needed.

Delivers reliable power management wherever you travel.

Enjoy worry-free power and always start your vehicle with confidence.