Dual Battery Systems

Running a fridge or camping lights and even charging the camera via an inverter, all put a strain on your original battery. A dual battery management system is the answer. Here at TJM we offer a range of dual battery management and charging systems available for all types of requirements. If you want a cold drink and to still be able to start the car in the morning, then read on because this is for you.

What do I need?

This will depend on your exact requirements and application. All the systems we install will isolate your vehicle or boat starter battery from your auxiliary battery to ensure that it maintains maximum charge for starting. All your accessory items will be powered by the auxiliary battery leaving your start battery fully charged.

We have systems available for fitting in the engine bay, under the tray of utes or in your camper trailer, caravan or boat.

To safely install and operate your electrical accessories from an auxiliary battery you will require the following:

 Electrical Management System

 Battery tray frame or battery box to suit your vehicle or trailer

 Battery suitable for your application

 Power outlets and cabling to suit your accessories

our Brands



Dual battery charging systems, extra batteries, management systems and battery monitors.  Whether you’re planning to travel the outback or just want to keep the food cold in a 12V fridge on a shopping trip, TJM will have you equipped with the extra power to run a fridge, electric winch auxiliary lighting or even charging the camera battery. For a no fuss battery management system visit one of our stores to discuss your exact requirements.

Download Auxiliary Battery Brochure


Redarc has over 30 years experience in the research, design, development and manufacture of a range of battery isolators, electronic voltage converters and associated products, inverters, power supplies, battery chargers, turbo timers, glow plug timers and trailer braking products.  



Baintech have a range of auxiliary battery accessories that include the Power Top Battery Pack, Keepower and Ctek battery chargers and an extensive range of quality sockets. The Power Top is a portable 100ah sealed AGM battery box which includes an in-built battery charger, a voltmeter with low voltage alarm and a range of output sockets to power your accessories. 

Download Powertop product sheet  Download Keepower


Related Accessories

Inverters and Chargers

* Please note suppliers may advertise prices that do not include freight and fitting.