Blue Sea Systems m-Series Mini Selector Battery Switch – 300A Heavy-Duty Marine Battery Control

The Blue Sea Systems m-Series Mini Selector Battery Switch is a compact, high-performance solution for managing multiple battery banks in marine applications. Designed with a “make-before-break” contact system, it allows seamless switching between batteries without interrupting power—ensuring reliable operation and enhanced electrical control onboard.

Key Features:

• 4-position selector switch (1, 2, Both, Off) for flexible battery management
• Make-before-break design prevents power interruption during switching
• 300A continuous, 500A intermittent, and 900A cranking capacity
• Supports dual battery banks with combine function for emergency starting
• Ignition protected and safe for marine environments
• Durable construction with tinned copper studs for corrosion resistance
• Compact design allows versatile installation in tight spaces