Sterling Power
Sterling Power BB12200 – 12V 200A DC-DC Battery Charger
Choose options
The Sterling Power BB12200 is the highest-capacity charger in the Saturn range — a 12V-to-12V battery-to-battery (DC-DC) charger delivering up to 180A at 13.8V to your auxiliary bank. It's built for the largest lithium systems in expedition vehicles, big campers, and off-grid builds where charge speed from the alternator matters most.
Unlike a voltage-sensitive relay, the Saturn charger measures both current and voltage to move intelligently through bulk, absorption, and float, giving your batteries a correct, complete charge on every drive. Six preset profiles (Lead, AGM, and Lithium — two of each) plus fully custom profiles via the optional BBR remote suit virtually any chemistry.
Charging Specifications
| Type | 12V → 12V battery-to-battery (DC-DC) charger, Saturn series |
|---|---|
| Input voltage range | 9–16V |
| Max output current | 180A at 13.8V |
| Max output power | ~2,484W |
| Max input current | 200A |
| Efficiency | 95–98% |
| Reverse / jump-start current | Up to 60A |
| Battery profiles | Lead I/II, AGM I/II, Lithium I/II (6 presets) + custom via BBR remote |
| Temperature sensor | TEMP1 included |
| Cooling | Thermostatically controlled, variable-speed fan |
| Protections | Self-recovering: under-voltage, input & output over-voltage, over-current, over-temperature |
| Recommended input cable / fuse | 70mm² (00AWG) / 250A |
| Recommended output cable / fuse | 70mm² (00AWG) / 250A |
| Dimensions | 309 × 130 × 96 mm |
| Weight | 2.2 kg |
| Operating temperature | −20°C to 60°C |
| Certifications | CE, UKCA |
| Warranty | 5-year return-to-factory |
Key Features
- Up to 180A output at 13.8V — the highest-capacity single unit in the Saturn range
- Bidirectional reverse-charge (jump-start assist) of up to 60A back to the starter battery
- Six battery profiles plus custom charge profiles via the optional BBR remote
- Lithium-safe: a live output wakes most BMS units; charging is disabled below 0°C when the temp sensor is fitted
- Self-recovering protections and conformal-coated internals; CE/UKCA approved; 5-year warranty
Smart Alternator / Euro-6 Ready
Three engagement modes cover any vehicle: automatic voltage sense (turns on above 13.5V input), ignition-feed control (for smart/Euro-6 alternators), and vibration sense (begins charging after detecting engine vibration — no ignition wire required).
Installation Notes
Requires a common, direct negative between the starter battery, charger, and auxiliary bank. The positive input must come from a circuit with a starter battery or Alternator Linearisation Device — not straight off a bare alternator. Rate the charger to no more than ~80% of your alternator's output. Fuse both input and output; recommended cable is 70mm² (00AWG) with 250A fusing for runs under 3m.
Presented by Overland Kitted
The Dispatch
Gear We Like: DVA Mechanics for the Grenadier
MAXTRAX Introduces Universal Mounting Pins for MKII, XTREME, and LITE Boards
