Voltage-Sensitive Relay Kit (can be used with Hardkorr Battery Box

Using a Hardkorr battery box with voltage-sensitive relay (VSR) is the simplest way to create a dual battery setup in your vehicle. The VSR acts as an isolator, allowing the auxiliary battery (inside the box) to charge directly from the crank battery while the car is running. Note: Not suitable for Lithium Batteries.

Voltage-Sensitive Relay Kit (can be used with Hardkorr Battery Box

Heavy Duty Battery Box - Hardkorr Australia

ATEM POWER 2X 12AH AGM Battery 12V AMP Lead Acid SLA Deep Cycle

Hard Korr Heavy Duty Battery Box, White

Hard Korr Voltage Sensitive Relay Kit for Heavy Duty Battery Box

Dual Battery Isolator Kit - 12 Volt 140 Amp Voltage

Dual Battery Wiring Kit (for Hardkorr Battery Box) - Hardkorr

Dual Battery Charger Isolator Kit 12V 140 Amp VSR Voltage

Hard Korr Heavy Duty Battery Box White