REDARC DC/DC Dual Input In-Vehicle Battery Charger - 12V 40A

The 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. It uses multi-stage DC-DC charging, a system that allows optimum charging levels for your auxiliary battery. Dual Battery Charger with solar input The DC to DC battery charger works from a wide operating range (9-32V) and provides the option of charging from both 12V and 24V vehicle systems. Additional features include a Maximum Power Point Tracking (MPPT) solar regulator, which allows the maximum amount of power to be delivered from your solar panels to your auxiliary battery. This Solar Ready smart charger also acts a dual battery isolator. If the voltage gets too low, the start battery is protected. It's fan free creating a quiet operation, is fully sealed, and has multiple levels of fault protection. The SEMA Global Media Awarding winning BCDC1240D is perfect for charging AGM, Gel, Standard Lead Acid, Calcium, and LiFePO4 batteries. The in-vehicle dual battery range keeps your auxiliary battery banks charged to their optimal levels and lets you continue your adventure uninterrupted. This DC-DC battery charger with solar input has been proven to work in all types of terrains, including deep water crossings, and stands up against extreme heat (up to 176 deg F). It's fully sealed against the risk of infiltration from water and dust and will hold up to the adventure at hand. It's designed to maximize the performance and life of your auxiliary battery and is suited for battery bank sizes of 200AH and above in most applications. Made in Australia by REDARC this amazing range has undergone years of testing in some of the harshest conditions on the planet. REDARC has been in business for nearly 40 years and all of our products are made tough enough to take anything nature can throw at them. This DC-DC battery charger with solar input has been proven to work in all types of terrains, including deep water crossings, and stands up against extreme heat (up to 176 deg F)

• Charges AGM, Gel, Standard Lead Acid, Calcium, and LiFePO4 batteries.
• Compact and fully sealed to block out water, dust, and vibration

The REDARC BCDC1240D is a 12V, 40A in-vehicle DC-to-DC battery charger designed to maintain and optimize auxiliary battery systems while driving or when parked with portable solar panels. Its multi-stage charging profile delivers the appropriate charge for compatible AGM, gel, standard lead-acid, calcium, and LiFePO4 batteries, helping support battery performance and service life. The charger accepts input from both 12V and 24V vehicle electrical systems across a broad 9–32V operating range, making it suitable for a wide variety of powersports, automotive, and off-road applications.
The integrated Maximum Power Point Tracking (MPPT) solar regulator helps capture available solar energy and deliver it efficiently to the auxiliary battery. The BCDC1240D also functions as a smart dual-battery isolator, protecting the starting battery by reducing or disconnecting the charging load when voltage becomes too low. Multiple levels of fault protection help safeguard the charging system, while the fan-free design provides quiet operation without sacrificing performance.
Built for demanding environments, the REDARC BCDC1240D features a fully sealed housing that helps protect against water, dust, vibration, and harsh terrain. It is engineered to operate in extreme heat up to 176°F and has been tested for challenging conditions, including deep-water crossings. The charger is suited for auxiliary battery banks of 200Ah and larger in many applications, making it a practical choice for off-road vehicles, recreational equipment, and remote power systems. Made in Australia by REDARC, the BCDC1240D combines reliable dual-input charging with rugged construction for dependable auxiliary battery maintenance.

• Charges AGM, gel, standard lead-acid, calcium, and LiFePO4 batteries


• Supports 12V and 24V vehicle systems with a 9–32V operating range


• Integrated MPPT solar regulator for efficient solar charging


• Fully sealed housing helps resist water, dust, and vibration


• Fan-free design provides quiet operation with multiple fault protections

Features:

• 12V, 40A DC-to-DC charging for auxiliary battery systems

• Dual-input charging from vehicle alternator and portable solar panels

• MPPT solar regulation helps maximize available solar power

• Compatible with AGM, gel, standard lead-acid, calcium, and LiFePO4 batteries

• Works with 12V and 24V vehicle electrical systems

• Smart dual-battery isolation helps protect the starting battery

• Fully sealed, fan-free construction for quiet operation in demanding environments

• Designed for operation in extreme heat up to 176°F