Dual Battery Systems
The one thing you really don’t want when you’re far from home in your 4x4 is a flat battery. A dual battery system is considered indispensable for any vehicle intended for remote use. But not all dual battery systems are created equal. There are plenty of generic dual battery kits on the market that are built to a price, but not optimized for the vehicle - or the user – they are to serve. With today’s vehicles containing so many computers you simply cannot afford to have a system that delivers an uneven electrical supply.
At Ultimate 4WD, we have developed a power distribution box that houses all the required electrical components for your dual battery system to operate effectively and efficiently. The compact form of the box allows us to install it in the engine bay of most modern vehicles, with the added flexibility of installing it inside the cabin or cargo area if the engine bay is too crowded.
The distribution box houses custom printed circuit boards, which hold all the circuit breakers, relays and fuses. With an easy to read fuse reference label, we have created a go-to point for all your electrical accessories, no more hunting for an in line fuse that may have been hidden somewhere in the engine bay!
Once installed, the smooth black finish of the box blends in with other components in the engine bay, giving a factory look, and keeping your engine bay extremely neat.



The distribution box can be used for everything from a simple system to run a 12v fridge, right through to complex systems running air compressor, lights, communication equipment, inverters, solar inputs and any number of other 12v accessories.
From there we custom build a wiring harness in-house, which is vehicle specific, and built to meet your needs. The system can also be built to integrate with campers and caravans, making all of your accessories work together in harmony
Our dual batteries systems are all inclusive of as many Australian parts as we can get, a lot of these parts are from the Australian designed and built REDARC Electronics. Along with integrating there batteries system parts alongside out own hand made wiring, we also recommend and fit REDARC’s full range brake controllers, isolators, gauges, Solar panels, and any other electrical 4X4 accessories one could need.
REDARC Electronics have over 30 years’ experience designing and making electronic voltage converters and electric trailer brakes. As well as dual battery isolators, and the Smart Start Battery Management System, with a controller that accepts AC, DC and solar inputs. The Smart Start Battery Management system is highly intelligent, with a range of different charging profiles that cater for all aspects of 4x4 use – even for storage. The Smart Start system has charging profiles for all battery types in common use. Better still, if your house battery is of a different kind to your vehicle start battery, the Smart Start system takes both in its stride.
The penalty of electrical failure when you’re far from home can be severe. If you’re in any doubt about the adequacy of your dual battery kit, or want to know more about the REDARC brake controller, talk to us today.
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Stage 1 Dual Battery Systems
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Stage 2 Dual Battery Systems
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Stage 3 Dual Battery Systems
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Stage 4 Dual Battery Systems
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Yeti 400 Battery Pack
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Redarc - Tow-Pro Electronic Trailer Brake Controller
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Redarc - Electric Brake 24V to 12V Adaptor
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National Luna Dual Monitor / Alarm
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National Luna Single Monitor
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National Luna Single Monitor / Alarm
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Projecta Dual Monitor / Volt meter
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Couplertec Electronic Rustproofing - Commercial Machinery System (8 pads)
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Couplertec Electronic Rustproofing - Mine Spec System (6 pads)
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Couplertec Electronic Rustproofing - 4WD Extreme Duty System (6 pads)
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Couplertec Electronic Rustproofing - 4WD Heavy Duty System (4 pads)
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Couplertec Electronic Rustproofing - 4WD System (2 pads)
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Couplertec Electronic Rustproofing - 2WD system (1 pad)
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REVERSE CAMERA EXTENSION LEAD ( 3M, 5M, 7M, 10M, 15M, 20M)
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QVEE REVERSE CAMERA 1/3" CCD SHARP W/AUDIO & IR
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QVEE MINI REVERSE CAMERA 1/3" CCD SHARP WITH IR
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QVEE MINI REVERSE CAMERA 1/3" CCD CLIP IN MOUNT
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QVEE REVERSE CAMERA 1/3" CCD SHARP W/AUDIO & IR
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QVEE LICENSE PLATE REVERSE CAMERA 1/4" CCD SHARP WITH IR
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QVEE MINI REVERSE CAMERA 1/3" CCD SHARP
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QVMN27 7" Replacement LCD Reverse Camera Monitor 10-32V
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QVEE REVERSE CAMERA MONITOR 12-24V 5.6'' SCREEN
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QVEE REVERSE CAMERA KIT WITH 7'' SCREEN
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QVEE REVERSE CAMERA KIT WITH 5.6'' SCREEN
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Redarc - Handbrake alarm 12V or 24V
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QVEE REVERSE ALARM 12-48V 97DB BLACK
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Smart Start Isolator 12V 200A
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Smart Start Battery Isolator 12V 100A and complete wiring kit.
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Smart Start Dual Sense Isolator 12V 100A
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Custom SBI12 Module Base Pricing
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Smart Start Isolator 12V 100A
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Redarc - Dashboard battery monitor for BA6000 Series Units
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Redarc - Relay Kit 60A 12V
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Redarc - Remote Switch (PowerBoss) 12V and 24V, for 1500W and 2500W
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Redarc - Low Coolant Alarm (with installation kit) 12V or 24V
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Redarc - Replacement Decal for EBRH