Blue Sea Systems 120 SI Automatic Charging Relay - SI Series

• Automatically combines batteries during charging and isolates batteries when discharging and starting engines.

• Protects sensitive electronics by temporary isolation of house loads from engine circuit during engine cranking.

• 12/24 volt auto ranging voltage input.

• Hermetically sealed contacts/vapor proof.

• Waterproof rated IP67 - temporary immersion for thirty minutes.

• Ignition protected - safe for installation aboard gasoline powered boats.

• Supports high-output alternators up to 120 Amperes

• Dual sensing