Sterling Power BM12123 Battery Maintainer, 12V to 12V 3A
- Regular price
- $77.90
- Sale price
- $77.90
- Regular price
-
$82.00
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 BM12123 is a small 12V-to-12V battery maintainer that keeps an extra battery bank topped up from a bank that already gets charge from a battery charger, solar panel or wind generator. It is aimed at boats and camper vans, and works the same way in an RV or trailer.
It switches on when the main battery reaches about 13.3V and passes surplus charge across, holding the second battery about 0.2V below the main one. It uses FETs instead of a relay, so it draws under 1mA, makes no noise and has no contacts to wear out. It has no boost stage and is not for batteries with a heavy ongoing drain; Sterling says it will not charge a battery being drained at more than 2A.
Features
- Solid-state FET switching, no relay clicking on and off
- Self-consumption under 1mA, so low solar or wind input is not wasted
- Current limiting, so engine starting loads do not affect it
- Can cover small standing loads such as battery self-discharge and engine-management drain (up to about 1A)
- Includes 1 m of cable
Specifications
- Model: BM12123
- Input: 12V DC
- Output: 12V DC
- Output current: 3A
- Turn-on voltage: About 13.3V at the main battery
- Dimensions (L x W x D): 140 x 77 x 40 mm (5.5 x 3.0 x 1.6 in)
- Unit weight: 0.25 kg (0.55 lb)
- Cable included: 1 m (about 3.3 ft)
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.
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