Brand: Mastervolt
Mastervolt BI 1203-S Battery Isolator
Mastervolt BI 1203-S Battery Isolator
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About this product
The Mastervolt BI 1203-S Isolator is designed to manage charging for systems with two or three independent batteries. Utilizing reliable diode technology, this unit divides charge current between batteries from a single alternator or battery charger.
Key Features:
- Solid-state construction for durability and maintenance-free operation.
- Corrosion-proof housing with integrated aluminum heat sinks for thermal management.
- Diode voltage drop of approximately 0.6 V, which can be compensated for by compatible chargers or regulators.
- Features molded diode splitters and synthetic end plates.
- Equipped with connection lugs and solid bolt connections with nuts and locking rings for secure, straightforward installation.
- Designed for use with 12V or 24V consumer systems.
Manuals & videos
- Secure checkout
- 21-day return requests
- Free standard shipping $100+
Product facts
- CT SKU
- CT-111092
- Model / MPN
- 83012031
- Package dimensions (H × W × L)
- 4" X 6" X 9"
- Package weight
- 3.1 lb
- Country of origin
- NETHERLANDS
Specifications
- Type
- Mastervolt BI 1203-S Isolator
Fit-sensitive item: confirm measurements, model numbers, and manufacturer details before ordering. Tug & Tow does not guarantee universal compatibility from a product page alone.
Shipping & returns
Shipping & returns
Request an eligible return within 21 calendar days after delivery. Every physical return requires written approval and an RMA number and must be shipped within five business days after the RMA is issued. The customer pays return shipping for an ordinary return. Tug & Tow provides prepaid return shipping for a verified damaged, defective, short, or incorrect shipment. We do not charge a restocking fee. See Shipping & Returns for eligibility, exclusions, and details.
Fit & compatibility
Fit & compatibility
Review the product title, description, images, dimensions, part numbers, and manufacturer details before purchase. For fit-sensitive items, confirm compatibility with your boat, RV, trailer, vehicle, or equipment.
Need help choosing?
Need help choosing?
Send us the product link or SKU, plus details about your boat, RV, trailer, vehicle, or project. We will help you narrow down the right option when product fit is not obvious.
