Both Voltage Sensitive Relay and Split Charge Relay are used to manage batteries in a dual battery system, which usually consist of a main battery and an auxiliary battery.

Typically, Split Charge Relay is controlled by the ignition wire, so that when the engine is running (ignition is ON), the split charge relay will close and connect both main battery and auxiliary battery. When the engine is not running (ignition is OFF), the split charge relay will open and disconnect the batteries. While it is relatively easy to install and operate, the charging and discharging operation is hardwired so the system will operate regardless of the state and condition of the batteries.

On the other hand, Voltage Sensitive Relay senses the voltage and thus the charge level of main battery and decide based on the charge level of main battery, whether it will close and connect both batteries or not. This is a superior way of charging, make sure that the main battery is full before it will charge the less important battery (auxiliary battery). It also allow part of the main battery to be used for accessories and less important use, while maintaining the necessary charge in the main battery to crank the engine.

Dual Battery System VSR

Dual Battery System VSR

There are also some smart, integrated modules, which include not only battery management but some of the smart switching functions, which allow people to control their accessories easily with touch of a button.

Leave a Reply

Your email address will not be published. Required fields are marked *

Related Posts

Dual Battery System

Methods of connecting two battery banks

Introduction The most common usage for dual battery systems is that the two batteries are generally disconnected so that you can run loads from the auxilliary battery without discharging the starter battery and compromising the Read more…

Dual Battery System

Tips for installing Voltage Sensitive Relay for Dual Battery System

Voltage Sensitive Relay is regarded as the natural upgraded version of Split Charge Relay. The main difference between Voltage Sensitive Relay and Split Charge Relay is the operation – it is totally automatic. Voltage Sensitive Read more…

Digital Switching

Using Digital Switching and Touch Panel to replace Traditional Rocker Switches and Mechanical Relays.

Converting a boat or a vehicle from traditional rocker switches and mechanical relays to an electronic digital switching system allows you to operate your electronics accessories with touch of a button and elimnate the bulking Read more…