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.

【Function】——Smart battery isolator cuts in at 13.3 volts and cuts out at 12.8 volts to ensure your primary battery is always charged and ready to run your vehicle. Car battery isolator allows parallel charging of both batteries. 【Emergency Condition】——The VSR can reverse charge.

The purpose of a Voltage Sensitive Relay (VSR) is to isolate the Auxiliary Battery from the Start Battery when there is no charge from the alternator. In simple terms the VSR will automatically disconnect the Auxiliary Battery from your Starter Battery when the engine is not

Dec 23, 2024 · The VSR is basically an automatic isolator switch, that connects the circuit from the crank/starter battery directly to the auxiliary battery (inside the box) when the voltage reaches 13.2V, so that the auxiliary battery charges from the alternator while the car is running.

The Korr Voltage-Sensitive Relay Kit for Hardkorr Battery Box is a simple way to make a dual-battery setup for your vehicle. The VSR acts as an isolator, which allows the auxiliary battery in the box to charge from the crank battery while your car is running.

The VSR units sense the input voltage generated and automatically connect/disconnect the appliance or circuit at pre-set voltages, eliminating the possibility of discharging the primary starting battery.

This VSR connects & disconnects the auxiliary battery from the starting battery based on its current level of charge.

Achieve the optimal dual battery setup with this voltage-sensitive relay (VSR), a simple solution to allow the auxiliary battery (inside the box) to charge directly from the crank battery while the car is running.