Dual Battery Kits

Auxiliary Battery Setups for 4WDs

Dual battery setup refers to having two different batteries in your vehicle. They serve two different functions: One is your starter (a.k.a. cranking) battery, is designed to start your car. The second (auxiliary) battery is designed to provide power to charge tools, run lights, a fridge or other electronics. With a dual battery setup, you don't have to worry about flattening your starter battery.

Get your dual battery setup sorted with Grow Energy. Have a look at our kits below, and either install it yourself or book in to get it installed by our experts!

Dual battery setups are best suited for frequent use - perfect for tradies who want to be able to charge their tools or for someone who does a lot of camping. It requires wiring to be installed into your car. For less frequent applications, we recommend a Portable Power Hub, which can be easily taken in and out of your car. View our portable power hub kits here.

Have a question?

Create Your Dual Battery Setup in 3 Steps

Our dual battery kits come complete with everything you need: a battery box, DC to DC battery charger and all necessary wiring. Simply choose your DC to DC charger and battery below, and you're set!

1. Wiring Components Included in Each Kit:

  • Matson battery box with voltage display and 2 USB ports
  • 40amp Redarc midi fuse kit
  • Anderson plugs
  • 6m of battery cable 8b&s red and black
  • Heat shrink
  • Battery lugs
  • Corrugated split sleeve 5m
Dual Battery Wiring Kit

2. Choose Your Battery Charger

Find out what a battery charger does, and why we recommend them over isolators, here: Why do I need a DC-DC Charger?

Dual Battery Kit Matson 20AMP
Matson Kit #1
with 20 AMP DC-DC Charger
Dual Battery Kit Matson 40AMP
Matson Kit #2
with 40 AMP DC-DC Charger
Dual Battery Kit Redarc 20AMP
Redarc Kit #1
with 25 AMP DC-DC Charger
Dual Battery Kit Redarc 40AMP
Redarc Kit #2
with 40 AMP DC-DC Charger

3. Choose Your Auxiliary Battery

Save $50 OFF the regular retail price of the below batteries when purchased in conjunction with a Dual Battery Kit! Limit of one per kit.

Your auxiliary battery is designed to power your electronics - lights, fridge, tools... All the things you can't live without.

Want to learn about the advantages of Lithium Ion batteries over lead-acid batteries? Visit our Lithium Ion Batteries page.

Hyundai DC27 Deep Cycle Auxiliary Battery
Hyundai DC27
640CCA Starting
90AH Deep cycle
30 month warranty
WAS $225
NOW $175
Amptech 100 Ah AGM Deep Cycle Auxiliary Battery
AGM Deep Cycle
12V 100AH
24 month warranty
WAS $260
NOW $210
Poweroad 100AH Lithium Ion Auxiliary Battery
Poweroad *Premium*
Lithium Ion
12V 100AH
3 year warranty
WAS $595
NOW $545
Hi Massi 12 V 100 Ah Crop Web
Lithium Ion
12V 120AH
3 year warranty
WAS $679
NOW $629

Let us install it for you!

Dual Battery Kit Installation

Book your set-up today

Our experts will kit you out with your dual battery system and show you how to use it. Maximum installation cost is $600. If it takes less than 6 hours, you pay by the hour ($100 per hour).

Going away for longer than a weekend?

Both the Matson and Redarc DC to DC chargers listed here have solar input, which means that you can connected a portable solar panel to your auxiliary battery to charge it up!

Check out our full range of portable solar panels and solar blankets.

All Makes and Models Fitted

Toyota Landcruiser, Toyota HiLux, Isuzu D-Max, Mazda BT-50, Mitsubishi Triton, Ford Ranger, Nissan Navara, Nissan Patrol, Holden Colorado, LandRover Discovery, Great Wall Steed, Mercedes X-Class, VW Amarok, and more!

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