Why do I need a battery isolator for my dual battery system?

Author: The Auto Store   Date Posted:8 September 2020 

Why do I need a battery isolator for my dual battery system? main image Why do I need a battery isolator for my dual battery system? image

Why do I need a battery isolator for my dual battery system?


The short answer, so your main battery doesn’t go flat

 

If you are wanting to set your vehicle up with a secondary battery then installing a battery isolator will ensure your dual battery system is running at maximum efficiency and your vehicle’s starting battery doesn’t go flat. In a standard dual battery set up, when your vehicle is turned off, your auxiliary item such as a fridge will draw power from both starting and auxiliary battery.  If you have your fridge running all night, it could potentially drain your vehicle’s main battery causing the vehicle not to start.


A battery isolator works by detecting when the main battery voltage drops below 12.8 volts when the vehicle is not running. When low voltage is detected the isolator directs charging only from the secondary battery.  This prevents your secondary battery from draining your main battery due to excessive discharge.


Battery isolators are a crucial component for effective battery management. At The Auto Store we stock a range of battery isolators from leading brands Thunder and Redarc.

For more information or to purchase a battery isolator visit our online store at www.theautostore.com.au