Mastervolt - Battery Isolators 1203-S

Master Your Onboard Power with Mastervolt Battery Isolators

Ensure seamless and efficient battery management on your boat with Mastervolt's BI series battery isolators. These compact and robust devices prevent unwanted battery drain, safeguarding your electrical system and maximizing your time on the water.

Intelligent Battery Management

• Prevents battery drain: Isolates your batteries, ensuring your starting battery remains fully charged and ready to start your engine, even if other onboard systems have depleted the secondary battery.
• Promotes independent charging: Allows independent charging of multiple batteries, optimizing the performance and lifespan of your batteries.

Reliable and Efficient

• Conventional diode technology: Proven and reliable design, with minimal energy loss for efficient power distribution.
• Automatic voltage drop compensation: Compatible with Mastervolt chargers and regulators, automatically adjusting for voltage drop to ensure proper battery charging.

Built to Withstand the Marine Environment

• Compact and lightweight: Easy to install and integrate into your boat's electrical system.
• Robust construction: Corrosion-resistant materials and encapsulated electronics ensure long-lasting performance in harsh marine conditions.
• Fast and easy installation: Equipped with connection lugs and solid bolt connections for a straightforward installation process.

Key Highlights

• Prevents battery drain and protects your starting battery
• Enables independent charging of multiple batteries
• Conventional diode technology with minimal energy loss
• Automatic voltage drop compensation (with compatible chargers/regulators)
• Compact, lightweight, and easy to install
• Robust construction for durability in marine environments