Sterling Power AB12130 12V 130A Alternator to Battery Charger

Sterling Power AB12130 — 12V / 130A Alternator to Battery Charger

The Sterling Power AB12130 is a compact, capable entry point into the AB series — a marine-grade alternator to battery charger that transforms your 12V alternator's output into a full 4-stage charge profile for your house or domestic battery bank. At 130A input capacity, it's well matched to stock or mildly upgraded alternators on trucks, SUVs, and marine engines where a single 80–130A alternator is the primary charging source.

The AB series works by placing a controlled load on the alternator, pulling its voltage down to a high-current, low-voltage state, then amplifying that power into a proper bulk, absorption, float, and equalization charge cycle at the output. The result is house bank charging up to five times faster than a standard alternator connection, with correct charge voltages that fully condition battery plates and extend battery life. No alternator modification is required and no ECU interference occurs during installation.

The AB12130 includes an internal split charge system that maintains a maintenance charge on the starter battery while dedicating full 4-stage charging to the house bank. It supports AGM, gel, flooded lead acid, and LiFePO4 chemistries, with built-in alternator and battery temperature sensing to protect the system under sustained load. An optional remote control (ABNRC) is available separately for full setup visibility and system monitoring.

Important compatibility note: The AB series is not recommended for modern European or Japanese vehicles equipped with Euro 5/6+ regenerative braking or integrated engine management systems. For those applications, Sterling's Battery to Battery (BB) Saturn series is the correct choice. The AB12130 is well suited to traditional American vehicles, older marine engines, and commercial equipment with conventional 12V alternator systems.

Key Specs:

• Input voltage: 12V DC
• Maximum input current: 130A
• Dimensions: 250mm × 180mm × 70mm
• Weight: 2.5 kg
• Compatible battery types: AGM, gel, flooded lead acid, LiFePO4
• Temperature sensing: alternator and battery
• Optional remote control: ABNRC (sold separately)

Not recommended for use with lithium batteries without an external current limiter. The AB series is not current limiting — for lithium installs, Sterling's BB Saturn series DC-DC chargers are the recommended solution.