Description

12V Split Charge Relay Kit – 140 Amp Dual Battery Isolator with LED Display

This 12V split charge relay kit is the ideal solution for safely managing dual battery systems in campervans, work vans, 4x4s, boats, and commercial vehicles.

Designed to protect your starter battery while charging a secondary leisure or auxiliary battery, this 140 amp voltage sensitive relay (VSR) automatically connects and disconnects based on battery voltage. This ensures your main battery remains fully charged and ready to start the vehicle while your second battery powers accessories such as inverters, fridges, lighting, and onboard electrical systems.

The built-in LED voltmeter display provides clear real-time voltage monitoring, allowing you to easily check battery status and charging performance.

Built with waterproof IP68 protection and heavy-duty components, this 12V split charge relay kit is designed for reliable long-term use in demanding environments including campervans, fleet vehicles, boats, and off-grid setups.

Complete with installation accessories, this kit provides everything needed for professional or DIY fitting.

Key Features

• 140 Amp split charge relay
• Intelligent voltage sensitive relay (VSR)
• Automatic battery isolation
• Dual battery charging management
• LED voltmeter display
• Automatic connect and disconnect function
• Protects main starter battery
• Suitable for leisure and auxiliary batteries
• IP68 waterproof protection
• Heavy-duty installation kit included
• Ideal for campervans and commercial vehicles

Suitable For

• Campervans
• Motorhomes
• Vans
• 4×4 Vehicles
• Boats
• SUVs
• ATVs
• RVs
• Commercial Vehicles
• Fleet Vehicles

What’s Included

• 1 x Battery Isolator Relay
• 1 x Black Earth Cable
• 2 x Fuse Holders
• 2 x Battery Terminals
• 4 x PVC Main Power Cables
• 4 x Fuses
• 4 x Insulated Ring Terminals
• 7 x Heat Shrink Tubes
• 9 x Foam Sticky Pads
• 10 x Cable Ties
• 18 x Screws
• 1 x Instruction Manual

Installation Information

Choose supply only or professional installation at your home or workplace.

Professional installation ensures safe battery connection, secure cable routing, correct fuse protection, and full system testing for reliable long-term performance.

Perfect for campervan conversions, fleet builds, and custom vehicle electrical setups.

Vehicle installer