Sterling Power BB124865 12V/24V to 48V 750W Battery-to-Battery Charger

The Sterling Power BB124865 is a buck-boost DC-DC charger that takes 12V or 24V input and steps it up to charge a 48V battery bank — a common need when adding a 48V lithium system to a vehicle or vessel running a 12V/24V starter and alternator. It auto-selects between 12V and 24V input, works with Euro 6+ smart alternators, and includes a reverse-charging mode that can top up the starter battery from the 48V bank in an emergency, plus a dedicated Jump Start Assist mode.

Key Specs:

• Input: 12V or 24V, auto-select (9-32V range)
• Output: 48V nominal
• Power Rating: 750W (peak)
• Efficiency: up to 96%
• Battery Profiles: 6 presets plus custom profile
• Features: reverse charging (starter battery maintenance), Jump Start Assist, low-temperature lithium protection
• Optional Accessory: BBR remote with live monitoring and current limiting (100%/85%/65%)

Part of Sterling's Saturn series DC-DC charging line — a solid choice for anyone stepping a 12V or 24V vehicle system up to a 48V lithium battery bank.