Dual Battery Chargers

Our DC to DC chargers keep your battery charged whilst driving & will fully charge auxiliary batteries to a proven 100%. Buy online now.

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Getting a dead battery when you’re off on a 4WD or caravan adventure is the worst. However, with some of the most powerful and compact DC DC battery chargers New Zealand has to offer, you can have peace of mind with REDARC. No matter what kind of dual battery system you're after, REDARC has the solution. Our wide selection of DC to DC chargers are designed to keep your battery charged whilst driving and will fully charge auxiliary batteries to a proven 100%.* learn more
*large capacity battery banks may require a few cycles to fully charge.


Compact in size, easy to install and suitable for 12 or 24 volt vehicle systems, REDARC's dual battery chargers work with either standard voltage alternators or smart alternators.

Choose between under bonnet or in-cabin DC to DC chargers

The REDARC range of dual battery chargers features the rugged, under bonnet-capable BCDC Classic range. These REDARC DC to DC chargers are fully sealed and potted to survive and thrive under extreme heat, as well as being water, dust and vibration proof. The BCDC Core chargers, on the other hand, are ideal for in-cabin, canopy or boot installations, offering all of the market leading features without being fully potted, saving you money on your dual battery setup.

Do you love using 4WD solar panels on your 4WD? REDARC's DC to DC battery chargers feature next generation battery charging technology, and are able to charge from Solar and DC inputs simultaneously.








Engine Bay




Cabin/ Canopy

70 - 150Ah Lead Acid/AGM




150 - 200Ah Lead Acid/AGM




200Ah + Lead Acid/AGM





60Ah LiFePO4




100 - 150Ah LiFePO4



200Ah + LiFePO4





Before selecting any of our battery charging products, be sure to find out the best dual battery setup for your needs with REDARC's Dual Battery Selector. Designed, built and tested in Australia for our unique conditions, our dc to dc chargers won't let you down.

Need some extra support when it comes to towing? REDARC's Tow Pro range of electric brake controllers offer a safe and effective trailer brake control system that will make you feel more secure on the road. Having the right setup for your car, caravan or 4WD is crucial to ensuring your journey goes smoothly. To get you there and back safely, you can trust REDARC.

How do I choose a DC to DC charger?

When choosing a DC to DC charger, consider the following factors:

  • Voltage compatibility
  • Current capacity
  • Battery type support
  • Smart features (e.g. temperature compensation, multi-stage charging, and equalisation charging)
  • Isolation and safety features
  • Solar integration
  • Installation and wiring
  • Warranty and support
  • Price

How big of a DC to DC charger do I need?

To work out how big of a DC to DC charger you need, you'll need to consider the power requirements of your auxiliary battery and the accessories you plan to run, as well as the charging efficiency and the charging time you want.



Need a little help with choosing the right product? We're here to help! You can use our handy vehicle look-up tool, find a local installer or stockist in your area or check out our FAQs.

Still not sure? Don't stress, you can contact our helpful Tech Support Team by phone or email too.