The REDARC BCDC1240D is a 12V 40A In-vehicle DC to DC battery charger. It features the next generation in REDARC In-vehicle charging technology, charging from Solar and DC inputs simultaneously. Suitable for 12 or 24-volt vehicle systems, the unit will also work with either standard or variable/smart alternators.
As a guide, the BCDC1240D is used for battery bank sizes over 200AH. For smaller batteries of 75-200AH REDARC recommends the BCDC1225D.