Sterling Power 12V input to 24V 1700W Output DC-DC Charger

The BB12-24120 is a state-of-the-art 12V to 24V DC to DC battery to battery charger designed for the efficient management of power between batteries. It auto-detects input voltages of 12V delivering up to 120A of input and 60A of output current, making it ideal for a wide range of automotive and marine applications. This unit is equipped with a unique reverse charging feature, offering the flexibility needed for complex power setups.

Key Features:

  • High Efficiency: Utilises a Buck Boost design to achieve 95-98% efficiency.
  • Versatile Charging: Offers a 4-stage charging process, compatible with lithium and other battery types.
  • Reverse Charging Capability: Allows for approximately 50A of reverse charge current at 13.3V and 25A at 26.6V, ensuring starter batteries are kept charged.
  • Smart Alternator Compatibility: Supports smart alternator systems, including Euro 6, with ignition feed or vibration sense activation.
  • Safety and Protection: Features 6 self-recovering protection systems, including under and over-voltage protection, and a low-temperature trip for lithium-ion batteries.


Feature Specification
Input Voltage Range 9V-16V
Input/Output Current Rating 120A at 12V input / 60A at 24V output
Reverse Current Rating 50A at 13.4V(max), 25A at 26.8V
Continuous Rated Output Power ~1700W
Efficiency Rating 95-98%
Operational Temperature -20°C to 60°C
Certifications CE, UKCA, E-Marking 2410R06/013789*00
Cooling Method Thermostatically controlled fan
Dimensions 270mm x 130mm x 73mm
Weight 1.8Kg

Optional Features:

  • Remote Control BBR: Enhances user control and monitoring capabilities.

The BB12-24120 charger is not only powerful but also smart, with six preset battery types and compatibility with smart alternators. Its reverse charging feature, enabled by default, ensures that your starter battery remains charged from surplus energy without draining your domestic battery. This feature is particularly useful for vehicles equipped with solar, wind, or additional charging sources.

SKU STE.BB12-24120
Model # BB1224120
Brand Sterling Power
Shipping Weight 1.8000kg
Shipping Width 0.270m
Shipping Height 0.073m
Shipping Length 0.130m
Shipping Cubic 0.002562300m3
Unit Of Measure ea

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