Sterling Power BB1240 Saturn DC-DC Charger, 12V to 12V 40A
- Regular price
- $448.00
- Sale price
- $448.00
- Regular price
-
$449.00
Will it fit my RV?
We don’t list this part for specific RV brands. Compare the dimensions with the part you’re replacing before ordering.
Prepaid return label, no restocking fee. Details
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The Sterling Power BB1240 is a Saturn series DC-to-DC charger that charges a 12V house battery from your vehicle's 12V alternator system. It is aimed at RVs, camper vans, overland rigs and boats, and is especially at home with lithium house banks.
Its buck-boost design converts power at 95% to 98% efficiency and limits current, so it protects your alternator while giving a lithium bank the profile it needs. It works with smart alternators on newer engines and can start from an ignition feed or by sensing engine vibration. Sterling's Saturn chargers can also run in reverse: when the house side is charged by solar or shore power, they top the starter battery back up to about 13.4V, and a jump-start assist mode forces that for 20 minutes.
Features
- Buck-boost converter, 95% to 98% efficient
- Current limiting, so the alternator is not overworked
- Lithium safe, with a low-temperature charging trip for lithium-ion batteries
- Smart alternator compatible
- Ignition feed or vibration-sense activation
- 6 preset battery types
- Self-recovering protection against under-voltage, input and output over-voltage, over-current and over-temperature
- Reverse charging to maintain the starter battery (on by default, can be turned off) and a 20-minute jump-start assist mode
- Can be paralleled with other Saturn chargers for more current or redundancy
- Optional BBR remote (sold separately) for live readings, custom profiles and 65/85/100% power limits
Specifications
- Model: BB1240
- Input: 12V DC (9V to 16V range)
- Output: 12V DC
- Rated output: 40A nominal; 38A continuous at 14.41V (about 550W)
- Quiescent current: 5mA
- Efficiency: 95% to 98%
- Operating temperature: -20°C to 60°C (-4°F to 140°F)
- Cooling: Thermostatically controlled variable low-speed fan
- Dimensions: 165 x 130 x 56 mm (6.5 x 5.1 x 2.2 in)
- Unit weight: 0.8 kg (1.76 lb)
- Approvals: CE, UKCA, E-marked (E24)
- Warranty: 5 years (Sterling, from Nov 1, 2024)
Genuine Sterling Power with Sterling Power's warranty. Ships from our warehouse in Upland, California. Not sure it fits your setup? Ask us before you order.
Eligible unused and uninstalled physical products may be returned
within 30 days after delivery.
Regular sale and discounted products are eligible for return.
Only products clearly marked “Final Sale” before purchase are
non-returnable.
Conditions and exclusions apply. See our Return and Refund Policy.
Free standard shipping is available on eligible physical-product orders delivered within the contiguous United States, with no minimum order amount.
Black Series generic replacement parts and products or orders that are oversized, require freight shipping, are special-order, contain hazardous materials, or are delivered to remote or limited-access areas are excluded. Any applicable shipping charge will be displayed at checkout before you submit your order.
In-stock products are generally processed within 1–2 business days. Estimated delivery is approximately 4–12 business days, depending on the product, destination, carrier, and delivery method.
Alaska, Hawaii, U.S. territories, and international destinations are not included in the contiguous United States free-shipping offer. See our Shipping Policy for complete details.
