Blue Sea Systems 9002E-BSS e-Series Battery Selector Switch 4 Position with AFD

The Blue Sea Systems 9002E-BSS e-Series Battery Selector Switch provides professional-grade battery management for marine and RV electrical systems. This heavy-duty 4-position rotary switch allows you to select between two isolated battery banks, combine both banks for maximum power, or disconnect all batteries for storage and maintenance.

Key Features:

• 4-position selector: Battery 1, Battery 2, Both, or Off
• Alternator Field Disconnect (AFD) prevents damage when switching under load
• 600 amp intermittent rating for high-demand starting applications
• 350 amp continuous rating for sustained loads
• 32 volt DC maximum system voltage
• Ignition protected for safe installation in engine compartments and fuel tank areas
• Durable construction with corrosion-resistant materials for marine environments

The integrated Alternator Field Disconnect is a critical safety feature that automatically disconnects the alternator field when switching between battery positions, preventing voltage spikes that can damage sensitive electronics and alternator components. The switch's robust design handles the demanding electrical loads of marine engines, bow thrusters, windlasses, and other high-draw equipment while maintaining reliable performance in harsh saltwater conditions.