The REDARC BCDCN1240 Core DC-DC Battery Charger delivers a robust 40A of charging current to keep your auxiliary battery fully conditioned on the road. Engineered with REDARC's Green Power Priority technology, this in-vehicle charger automatically prioritises any available solar input before drawing from the alternator — reducing engine load and maximising charge efficiency. Its MPPT solar regulator, wide 9–32V input range, and support for all mainstream battery chemistries (AGM, Gel, Standard Lead Acid, Calcium, and LiFePO4 Lithium) make it one of the most versatile 40A dual-input chargers on the Australian market. At just 165 × 120 × 37 mm and 0.9 kg, it installs neatly inside a vehicle cabin, canopy, or battery management box with minimal fuss.

Whether you're heading off-road in a 4WD, towing a caravan across the outback, or setting up a camper trailer at a remote campsite, the BCDCN1240 ensures your auxiliary battery stays charged from both your alternator and solar panels simultaneously. It's equally at home powering fridges, lighting, and electronics in caravans, RVs, motorhomes, and camper trailers — and its compatibility with both standard and smart/variable voltage alternators means it works with virtually every modern vehicle on Australian roads. A multi-stage charging algorithm maximises battery performance and longevity, so you spend less time managing power and more time enjoying the adventure.

Key Features

• 40A continuous output with 600W nominal power — charges auxiliary batteries fast from alternator or solar
• Green Power Priority automatically selects solar input first, reducing alternator load and fuel consumption
• Built-in MPPT solar regulator with 9–32V input range handles panels from 9V to 32V
• Supports AGM, Gel, Standard Lead Acid, Calcium, and LiFePO4 Lithium battery chemistries
• Compact in-cabin design (165 × 120 × 37 mm, 0.9 kg) suits 4WD, caravan, RV, and camper trailer installations