With so many people looking to get out and explore the country, overlanding and boondocking is becoming increasingly common. It’s easy to see why; secluded campsites in the middle of nowhere, no phone reception, no one else around for miles and it doesn’t cost you anything. If you’re looking to get into boondocking, one of the most common upgrades people get is upgrading from a single battery to a dual battery system.


A common charging issue
While you can boondock with just your starter battery, it’s not going to do any favours for your battery’s health. Known as cranking or starter batteries, the primary purpose of the battery in your engine is to keep your car running so when you discharge this battery too low you run the risk of your car not starting. Which, if you’re in the middle of nowhere, can be pretty disastrous. While batteries are made to be discharged, draining your battery too low is going to lead to poor battery health in the long run. Batteries only have a certain number of life cycles, so continuously draining your starter battery too low is going to reduce this lifespan, meaning you’ll be replacing your battery under the hood more frequently.
Because you want to avoid draining your start battery too low, you’ll want to avoid 12V accessories off it. A vehicle starter battery is designed solely to start the engine, with reserve capacity to power a few ancillary functions when the engine is off. Running 12V accessories from your start battery is a quick way to drain it even further.


This means that if you’re happy to rely on a cooler and torches for camping, you will be fine. However, if you want to take it to the next level and enjoy the comforts provided by 12 volt lighting, a powered fridge, constant source of charging for personal electronics like phones, drones, speakers, LED camp lights and the potential to run all the creature comforts of home, you’ll need the power of a house or second battery to ensure you won't be left stranded with a dead engine battery.
In the simplest form, having a second battery means that you can run all your 12V accessories from this battery, whilst sparing your starting battery from being discharged too low. While you can just have a house battery on its own, you may run into trouble when you’re looking to recharge it. This is where a DC to DC charger comes in. Having a DC to DC charger in between your starting and house battery allows you to recharge your house battery from the vehicle’s alternator while you’re driving. This allows you to recharge your battery on the way to your destination, giving you plenty of power to run all your 12V gadgets and keep phones, camera and drones charged to capture the adventure.


Powering Truck U's 5-Star Gladiator build
For their 5-star Jeep Gladiator build, Truck U chose the REDARC BCDC to keep their house batteries topped up and the margarita maker in full swing. REDARC’s DC-DC dual battery charges can be installed under the bonnet, in the canopy or trailer. Allowing plenty of flexibility to fit into your boondocking setup. They can also be connected to fixed and portable solar panels for extra changing during the daylight hours. So, if you’re planning to be parked up for a longer period, you won’t have to worry about any flat batteries.
To keep your batteries charged and for added peace of mind in case of starter battery failure, REDARC’s jump start dual battery kit means you’ll never be stuck with a flat battery, no matter how remote you go. Having a smart start battery isolator as well as an BCDC in-vehicle battery charger means that you can run all your 12v accessories including fridges and inverters while having the capability to jump start your starter battery at the touch of a button.
To find out the best DC-DC dual battery charger to suit your travel power needs and vehicle type check out our vehicle selector tool or learn more about the Truck U 5-Star Gladiator.
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POWERING XOVERLAND’S JOURNEY TO ALASKA
At REDARC, we know that the heart of any great adventure lies in the technology that powers it. For over 45 years, we’ve been at the forefront of power management solutions, ensuring overlanders like the team at XOVERLAND can rely on uninterrupted power no matter where the journey takes them.
On their latest expedition, Spirit of Adventure, XOVERLAND co-founder Clay Croft and his sons are racing 8,500 miles from Bozeman, Montana, to Prudhoe Bay, Alaska. Along the way, they rely on REDARC’s robust products to keep their gear running smoothly, ensuring a seamless experience across rugged terrains and unpredictable weather.
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On the Road Tips from FOUR WHEELED NOMAD
Why do we choose REDARC to power our rig?
Living full-time on the road for 11 years, we’ve learned that reliable power isn’t a luxury—it’s a necessity. From 10 wild weeks of sublime craziness in Iceland (including eight without a diesel heater) to our biggest adventure yet, the Mega Transect, we need a setup that will serve us well, no matter where we are.
That’s why we run REDARC.
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REDARC REDWORKS Power Panels: The Plug-and-Play Solution for RV and Van Manufacturers
April 2, 2025 – REDARC, a leader in off-grid power solutions, is proud to announce the launch of its REDWORKS QuickFit Power Panels, a revolutionary all-in-one power system designed to simplify installations for RV and van manufacturers. These panels integrate critical power components like the Manager Alpha, dual TVMS Rogues, and all necessary wiring into a single unit.
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REDARC are taking a short break over Easter
The REDARC team are taking a short break over the Easter and ANZAC day period, but we will still have a range of support options available.
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BCDC Trailer - 12A Vehicle to Trailer Charger BCDC1212T$299.00In stockCharge your trailer batteries with this 12amp dump trailer charger from REDARC.
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20A In-Vehicle DC Battery Charger BCDC1220$399.00In stockKeep your battery charged while driving with the REDARC BCDC1220, a 12V 20A in-vehicle, multi-stage, DC to DC battery charger.
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20A In-Vehicle DC Battery Charger (Ignition Control) BCDC1220-IGN$399.00In stockThe REDARC BCDC1220-IGN is a multi-stage DC to DC dual battery charger which features technology capable of fully charging a lead acid auxiliary battery.
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BCDC Classic25 12V 25A DC Battery Charger BCDC1225D$465.00In stockThe REDARC BCDC1225D In-vehicle Dual Battery Charger is a 12 volt, 25A in-vehicle DC-DC battery charger designed to charge your secondary battery banks to 100% state of charge while on the move.*
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BCDC Classic40 12V 40A DC Battery Charger BCDC1240D$540.00In stockThe REDARC BCDC1240D is a 12V, 40A In-vehicle DC to DC Battery Charger designed to keep your auxiliary battery charged when driving or with portable solar panels when parked.
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BCDC Classic50 12V 50A DC Battery Charger BCDC1250D$599.00In stockThe REDARC BCDC1250D is a 12V, 50A In-vehicle DC to DC Battery Charger designed to keep your auxiliary battery charged when driving or with portable solar panels when parked.
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24V 20A In-Vehicle DC Battery Charger BCDC2420$585.00In stockThe REDARC BCDC2420 In-vehicle Dual Battery Charger is a 3-stage, 24V, 20A, DC to DC charger that operates from a vehicle input between 9 and 32 Volts DC.
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Trailer Power Kit TRAILERKIT01$463.60 Regular Price $488.00In stock
*Online Exclusive Bundle* Make battery charging and monitoring simple with REDARC’s Smart Battery Monitor and 12A BCDC. Designed for on-trailer installation, take the guess work out of monitoring your battery levels.