Sterling Power Battery to Battery Charger – 12V to 12V – 40A – DC Powered Charger
The 40-amp Sterling Power Battery to Battery Charger provides 12-volt to 12-volt DC charging for compatible installations. Its dedicated battery-to-battery operation helps replenish a secondary bank, supporting reliable power availability while preserving organized onboard electrical management.
Sterling B2B 12V to 12V/40A
| Brand | Sterling Power |
| SKU | BB121240 |
| Output Current | 40 Amps |
| Input Voltage | 12V DC |
| Output Voltage | 12V DC |
| Battery Types | LiFePO4, AGM, Gel, Flooded |
| Algorithm | 4-Stage Smart Charging |
| Efficiency | >95% |
| IP Rating | IP21 |
| Ignition Protected | Yes |
| Communication | Status LED Interface |
| Temp Compensation | Included |
| Safety Protections | Input/Output Reverse Polarity |
| Cooling | Natural Convection / Fan |
| Dimensions | 190 x 160 x 70 mm (7.5x6.3x2.7") |
| Weight | 1.2 kg (2.6 lbs) |
| Certifications | CE, E-Marked, RoHS |
| Application | Small Boats, Campervans, Euro 6 Engines |












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