When you’re exploring Australia’s toughest tracks, a reliable dual battery system is essential to keep your fridge, lights, and accessories powered all day and night. At All12 Volts, we stock and install some of the best dual battery kits for 4WDs, designed for durability, efficiency, and seamless off-grid power. Whether you’re heading into the bush, touring the coast, or setting up camp off-grid — we’ve got the perfect 12V setup for your needs.
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A dependable dual battery system lets you run your fridge, camp lighting and 12V accessories without risking a flat starter. This guide compares the best dual battery kits for 4WDs in Australia and explains how to choose the right setup for touring, off-grid camping and work utes.
A dual battery system pairs your starter battery with an auxiliary battery that powers accessories independently. The result: consistent 12V power for longer stays, with your main battery reserved for cranking.
Essential for vehicles with smart alternators. A DC-DC charger delivers multi-stage charging tailored to AGM, Gel or Lithium chemistries for maximum battery life and efficiency.
Good for: Most modern 4WDs and mixed driving/camping.
Lithium dual battery kits are lightweight, charge quickly and provide usable deep discharge (typically 80–90% DoD) with long cycle life.
Good for: Serious tourers, frequent off-grid, weight-sensitive builds.
AGM kits are proven, budget-friendly and vibration-resistant—ideal for weekenders and lighter loads.
Good for: Short trips, modest loads, value builds.
Plug-and-play power you can move between vehicles or carry to the campsite. Many include outlets, fusing and a voltmeter.
An isolator separates starter and auxiliary batteries; a DC-DC charger actively controls voltage/current for faster, healthier charging—crucial with smart alternators and lithium.
Weekend setups often start at 100Ah. High-draw or longer trips consider 120–200Ah, especially with fridges + inverters. Add solar to extend runtime.
Yes. Pair panels with a DC-DC or MPPT regulator for safe, efficient charging while parked.
Lithium offers lower weight, deeper usable capacity and longer life. AGM wins on upfront cost and heat tolerance (often better under-bonnet).
Portable boxes are DIY-friendly. Hard-wired systems should follow correct cable sizing, fusing and mounting—professional fitment is recommended for safety and reliability.
Who does not love the outdoors and camping? It's a great adventure and opens up new destinations and often unexplored places. But you need to be well equipped with the safe and durable caravan and camping accessories for these outdoor activities. It is undoubtedly thrilling and exciting, but unless you take good care of what you need to do and what you should avoid, there's always a chance of an unpleasant experience. It pays to take sound advice from a 4WD specialist when going on a camping trip.