Dual Battery Systems
for 4WDs & Caravans
Charge Up
Devices & Tools
Have your power tools ready to go for a more productive work day on-site. Ensure devices are fully charged for work, travel, or emergency needs.
Long-distance
exploration
Travel further and find places off the beaten track. Clock up the kilometres and explore those far-off places you’ve never been to before.
Backup power
source
Keep your camping gear going with uninterrupted power, whilst not draining your main battery, and do not have to rely on camping sites for power supplies.
Not Sure What You Need?
Let’s Find Your Perfect
Power Solution
overwhelming. Our experts will:
1
Audit Your Setup
Assess your current power usage and goals.
2
Explain Your Options
No jargon, just honest advice.
3
Match You with the Right System
Budget-friendly to expedition-ready.
When Do You Need a Dual Battery System?
You’re...
- Running a fridge or LED lights overnight in your 4WD.
- Tired of jump-starting your car after camping trips.
Ideal For...
- 4WDs with electric brakes or winches.
- Camper trailers without solar.
Signs You Need It:
- Your starter battery dies after 1 night with the fridge on.
- You're using battery boxes with alligator clips.
Who is BMC Off Grid
QLD’s trusted dual battery specialists since 2015.
- REDARC Elite Installer– 300+ systems installed.
- No Cut-and-Shut Wiring
- Tested in FNQ Conditions
Why Choose Us
REDARC RedNetwork
Certified
Trusted by Australia’s top
brands.
No Hidden
Costs
Free upfront quotes.
Adventure-
Ready
We test our systems in real
off-grid conditions.
Real-World Results
A recent customer came to us looking to install a dual battery system in their vehicle, with the primary goal of powering a fridge and other accessories while off the grid. After discussing their specific off-grid power needs, we designed a solution that would keep their gear running smoothly during extended trips.
We successfully fit the dual battery system under the hood of the vehicle, optimising space without compromising functionality. To complement this, we installed an Anderson plug, USB outlets, and a power pack in the rear of the wagon, providing easy access to power for the fridge and additional accessories. This custom setup ensures the customer has a reliable, efficient power source wherever their adventures take them.
We recently completed a custom dual battery system installation on this Ford Ranger, perfect for off-grid adventures to places like Moreton Island! The customer requested a behind-the-seat setup, so we installed a high-performance Supcelion battery securely mounted in a custom battery cradle.
To ensure efficient and reliable charging of the dual battery, we included a RedArc BCDC. This smart charger maximises battery life and performance, especially when running accessories off-grid or on long trips.
The setup also features a charging pack in the tray for convenience and a UHF radio with an aerial to ensure reliable communication in remote areas. Check out the photos of this clean and functional installation!