SKU:
EX 83012021
€ 178,68
1-2 weeks delivery time
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The Mastervolt BI 1202-S (83012021) is a high-performance dual-output battery isolator designed for reliable charging of two independent battery banks from a single alternator or charger. Based on robust diode technology with built-in voltage drop compensation, it supports up to 120 A from an alternator and 80 A from a battery charger. Featuring a solid-state, corrosion-proof design with molded diode splitters and integrated aluminium heat sinks, this isolator ensures maintenance-free operation and efficient energy distribution in marine and vehicle systems. Its compact housing (207 x 140 x 80 mm) and secure bolt-type connections provide fast, secure installation.
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Mastervolt 83012021 - BI 1202-S Battery Isolator (2 Outputs, 120A Alternator, 80A Charger)
The Mastervolt BI 1202-S is a compact and rugged battery isolator engineered to enable independent charging of two separate battery banks from a single power source. Utilizing proven diode-based technology, it ensures reliable and loss-minimized current division between batteries. The integrated voltage drop compensation allows compatibility with modern alternators and smart battery chargers such as Mastervolt’s Mass series and Alpha Pro regulators.
Main Features
- Dual battery output for independent charging
- Supports 120 A from alternators and 80 A from battery chargers
- Diode-based technology with integrated voltage drop compensation
- Solid-state construction – wear-free and maintenance-free
- Encased electronics with molded diode splitters
- Corrosion-proof housing with aluminium heat sinks
- Synthetic end plates with secure bolt connections
- Quick installation with locking nuts and lugs
- Ideal for marine and mobile battery systems
Technical Specifications
Parameter Value Number of Battery Outputs 2 Max. Output (Battery Charger) 80 A Max. Output (Alternator) 120 A Voltage Drop Compensation Yes Dimensions (H x W x D) 207 x 140 x 80 mm / 8.1 x 5.5 x 3.1 in Weight 1.2 kg / 2.6 lb
Package Contents
- Mastervolt BI 1202-S Battery Isolator
- Pre-mounted aluminium heat sink
- Connection hardware (nuts and locking rings)
- Installation instructions
Documents
BI 1202-S - User Manual Size: 158,5 Kb -
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