REDARC Classic 12V In-Vehicle DC-DC Battery Chargers


The REDARC Classic 12V 25A, 40A, and 50A In-Vehicle DC-DC Battery Chargers are designed to keep your auxiliary battery charged when driving or with portable solar panels when parked. They use multi-stage DC-DC charging, a system that allows optimum charging levels for your auxiliary battery. These DC-DC Battery Chargers are solar-ready and suitable for many battery types including lithium, AGM, GEL, standard lead acid, and calcium.

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Dual Battery Charger with Solar Input

REDARC Classic In-Vehicle DC-DC Battery Chargers have been developed to provide a higher current output. They feature an additional charging stage known as SoftStart, which has been engineered so that it can handle more demanding applications.

Multi-Stage Charging Profile

Featuring a Maximum Power Point Tracking (MPPT) solar regulator, the REDARC Classic In-Vehicle DC-DC Battery Chargers will charge from both solar and the alternator simultaneously. With built-in Green Power Priority, they will select solar charging first, meaning less load on the alternator.

These units are suitable for 12- or 24-volt vehicle systems and will also work with standard or variable/smart alternators. They are compatible with all common types of batteries used in automotive and recreational vehicles, such as AGM, Gel, standard lead acid, Calcium, and LiFeP04.

Built Tough for All Conditions

These DC-DC battery chargers with solar input have been proven to work in all types of terrain, including deep water crossings, and stand up against extreme heat (up to 176°F). They’re fully sealed against the risk of infiltration from water and dust and will hold up to the adventure at hand. They’re designed to maximize the performance and life of your auxiliary battery and are 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 40 years and all of our products are made tough enough to take anything nature can throw at them.

*Suitable for use on vehicles with conventional alternator charging systems.


  • Warranty: 2 Years
  • Battery Chemistry: Standard Lead Acid, Calcium content, Gel, AGM or LiFePO4 type only
  • Continuous Rating: 25A – 50A
  • Power Type – AC DC: DC to DC
  • Nominal Output Power: 375W – 750W
  • Input Fuse Rating: 40A to 60A (Not Supplied)
  • Solar Switch on Voltage: 9V
  • Suitable for 12V Systems: Yes
  • Suitable for 24V Systems: Yes
  • Solar Input Voltage: 9V – 32V
  • MPPT Solar Regulator: Yes
  • Cabin / Canopy Install: Yes
  • No Load Current: <100mA
  • Trailer Install: Yes
  • Engine Bay Install: Yes
  • Max. Charging Voltage: 15.3V
  • Output Fuse Rating: 40A to 60A (Not supplied)
  • Operating Temperature: 5°F to 176°F
  • Output Voltage: 12V DC
  • Max. Rated Output Current: 25A – 50A
  • Input Voltage: 9 – 32V
  • Standby Current: <8mA
  • Connector Type: Bare wire
  • Weight: 35.3 oz (1kg)
  • Width: 4.7″ (120 mm)
  • Height: 1.5″ (37 mm)
  • Depth | Length: 6.5″ (165 mm)

Additional information

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Dimensions N/A

25A, 40 A, 50A

REDARC Classic 50A In-Vehicle DC-DC Battery Charger Manual



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