REDARC 12V 40A Smart Start DC-DC Dual Input Battery Charger with MPPT

The REDARC BCDC1240D Smart Start Dual Input DC-DC Battery Charger keeps your secondary (house) battery fully charged while you drive — the heart of a capable overland electrical system. Dual inputs let you charge from the vehicle alternator and solar panels at the same time for reliable off-grid energy.

Built-in MPPT optimizes solar output, while Green Power Priority draws from the sun first to reduce alternator load and maximize efficiency. A multi-stage charge profile supports AGM, gel, standard lead-acid, calcium, and LiFePO4 lithium batteries, delivering efficient power for banks of 200Ah and up in most common setups.

Fully sealed electronics are engineered for overlanding: it withstands deep water crossings, heat up to 176°F, dust, and vibration, and it is 12V/24V compatible. Backed by a 2-year limited warranty.