The REDARC BCDC1240D Classic is a heavy-duty 40-amp DC-to-DC in-vehicle battery charger with integrated MPPT solar regulator, purpose-built for Australian 4WD, caravan, and RV setups. Delivering up to 40A of regulated charge current, it intelligently manages power from your vehicle's alternator — including modern variable-voltage (smart) alternators — and combines it with solar input via its built-in MPPT controller to keep your auxiliary battery charged faster and more efficiently than a basic isolator ever could. Engineered and manufactured in South Australia, the BCDC1240D handles AGM, GEL, calcium, lithium (LiFePO4), and standard lead-acid battery types with fully automatic multi-stage charging profiles, ensuring your battery bank receives the precise voltage and current it needs at every stage of the charge cycle.

Designed for Australian conditions — from the red dust of the Outback to coastal caravan parks — the BCDC1240D is the go-to charging solution for overlanders, grey nomads, and serious off-road adventurers who rely on a healthy auxiliary battery to run fridges, lighting, water pumps, and 12V appliances on extended trips. Install it in your 4WD, camper trailer, fifth-wheeler, or motorhome and enjoy confidence that your house battery is being optimally charged whether you're driving down the highway or parked up under solar panels at your favourite bush campsite. Its compact, dust- and moisture-resistant housing and wide input voltage range make it equally at home in a tight canopy build or a full caravan electrical system.

Key Features

• 40A output with integrated MPPT solar regulator for combined alternator and solar charging
• Compatible with AGM, GEL, calcium, lithium (LiFePO4), and lead-acid auxiliary batteries
• Works with modern variable-voltage smart alternators found in late-model 4WDs and tow vehicles
• Fully automatic multi-stage charging (bulk, absorption, float) for optimal battery health
• Compact, sealed housing rated for harsh Australian outdoor and in-vehicle environments