Mastervolt BI 1203-S 83012031 – Charging current distributor

The Mastervolt BI 1203-S is a compact battery isolator for onboard systems with multiple batteries. Thanks to conventional diode technology, the charging current is distributed reliably; the voltage drop of approximately 0.6 V can be compensated for by the output voltage of the connected battery charger or alternator. The solid, corrosion-resistant design with an aluminum heat sink is designed for long-term use.

Plus points

• Reliable distribution of charging current with isolating diodes.
• Voltage drop approx. 0.6 V, can be compensated via battery charger or dynamo.
• Compact solid-state design; no mechanical wear.
• Quick installation with plastic end pieces and sturdy bolt connections.

Specifications

• Brand: Mastervolt
• Model: BI 1203-S
• Technology: conventional diode technology
• Construction: corrosion-resistant material, aluminum heatsink; electronics encapsulated in plastic
• Mounting: plastic end pieces with mounting lip; bolt connections with nut and lock
• Voltage drop: approx. 0.6 V (compensable)
• Weight: depending on model 580–1300 g
• MPN: 14662113

This BI charging current isolator supports clean separation between battery banks during charging, keeping consumers separate. Voltage drop compensation is available as standard with Mastervolt battery chargers and Alpha Pro MB charge regulators, allowing for easy adjustment within the system.