Product code: SPP-BB1240
Sterling Power BB1240 Saturn Bidirectional 12V to 12V (DC to DC) battery to battery charger rated 40A, featuring reverse charging and jump start assistance mode. With a 550W output power.Sat Read more
Sterling Power BB1240 Saturn Bidirectional 12V to 12V (DC to DC) battery to battery charger rated 40A, featuring reverse charging and jump start assistance mode. With a 550W output power.
Saturn Series – The Ultimate DC/DC Charging Solution
The Saturn Series represents the pinnacle of DC/DC charging technology, offering unmatched efficiency, bidirectional charging, customizability, and reliability. Designed to safely charge, maintain, and optimize battery performance, it excels in high-demand environments with continuous full-load operation, advanced current limiting, and Lithium compatibility.
The Saturn Series is the most efficient, intelligent, and adaptable DC/DC charging system, engineered to optimize battery performance, prevent alternator damage, and future-proof your power setup.
The Saturn series charger is a culmination of everything Sterling have learned in their years of experience with DC/DC charging. What was once a simple idea to allow safe charging and use of a bow-thruster bank has evolved into the most reliable, stable and adaptable way of managing a DC battery circuit - including charging, maintaining and catering to even unique demands.
Sterling are genuinely proud to reveal the Saturn series. Efficiency in the high 90 percentile, unparalleled features (bidirectionality, high efficiency, customisability, continuous running at full load even in adverse conditions), current limiting, lithium suitable - and backed up with support from Sterling. This is the next step of DC/DC charging.
Not only are Sterling the most reliable method of safely and properly charging a lithium battery bank without wrecking your alternator- they are also heavily customisable, ensuring whatever unique battery circumstance you present to them, they are able to support.
Battery-to-Battery Charger Remote BBR (Optional Extra - Our Part Number SPP-BBR) - offering live voltage & current monitoring, custom charge profile adjustments (Absorption, Float, Time), adjustable current limits (100%, 85%, 65%), lithium float voltage removal for optimised performance.
Scalability & Redundancy
Parallel multiple BBs for increased charge capacity
Fine-tune power output for precise current control
Ensures redundancy in case of unit failure
Self recovering protections:
Under voltage protection
Input over voltage protection
Output over voltage protection
Over current protection
Charge over temperature
E-Marked!
Cooling method: Thermostatically Controlled
Variable low speed fan
Industry-Leading Efficiency (95-98%)
Buck-boost design for optimal power conversion
Current-limiting technology for safer charging
Compatible with Euro 6+ Smart Alternators
Ultimate Flexibility & Safety
6 Pre-set battery profiles & user-defined custom profiles
Low-temperature trip protection for Lithium batteries
Ignition feed & vibration sense activation
Advanced Bidirectional Charging
Reverse charging ensures starter battery maintenance
Jump Start Assist mode – emergency engine start capability
EV-Compatible Power Management
Prevents 12V EV battery drain while supporting auxiliary loads
Limits current draw to protect the vehicle's DC/DC converter
Optimises charging voltages for 12V & 24V applications
| Brand | Sterling Power |
| Series | Saturn |
| Model | BB1240 |
| Voltage Description | Input Range: 9V to 16V DC |
| Amps Description | Continuous output power: 38A at 14.41V ~550W, Continuous input current: 42A at 13.68V ~575W, Quiescent current: 5mA |
| Efficiency | 95-98% |
| Height Description | 165mm |
| Width | 130mm |
| Depth | 56mm |
| Weight | 0.8Kg |
| Wattage | 550W |
| Approvals | CE, UKCA & E-Marked |
| Operating Temperature | -20°C to +60°C |
£243.78
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£243.78 Incl VAT
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