Sterling 12v 30A Battery-to-Battery (B2B) Charger

This 12V 30A Battery-to-Battery charger delivers rapid, intelligent charging while you drive, without interfering with modern vehicle electronics. It provides a full 4-stage charging profile directly from one battery to another, eliminating the need for complex wiring, alternator modification, or ECU interaction.

Designed for modern vehicles with smart alternators and regenerative braking, this B2B charger operates independently of the alternator’s control logic. No alternator tampering. No warranty risk. No ECU faults. Installation is direct and minimal: connect the charger between the source battery and the battery being charged.

The result is advanced charging performance with none of the common drawbacks. Stable, controlled output. Consistent battery health. Reliable charging while cruising.

Key Benefits

• Fast 4-stage battery charging while driving

• No alternator modification or warranty risk

• No ECU interaction or electronic conflicts

• Fully compatible with smart alternators and regenerative braking

• Simple, fast installation with minimal wiring

• Ideal for leisure, auxiliary, and onboard battery systems

Technical Specifications

• Input nominal voltage: 12V DC

• Output nominal voltage: 12V DC

• Maximum output current: 30A (output limited, input unrestricted)

• Output voltage: Variable, dependent on selected charging profile

• Charging method: 4-stage intelligent charging

• Cooling: Variable speed fan

• Cable connection: Screw clamp terminals

• Maximum cable size: 16mm²

• Ingress protection: IP21 (drip-proof when mounted vertically)

• Weight: 1.4kg

• Dimensions: 198 (H) × 164 (W) × 71 (D) mm

• Fixing hole diameter: 4.5mm

Ideal Applications

• Auxiliary and leisure battery charging

• Camper vans, work vans, and mobile systems

• Vehicles with smart or regenerative alternators

• Users requiring fast, safe, non-intrusive charging