Blue Sea's 120 Amp Automatic Charging Relay protects sensitive electronics by temporary isolating the batteries to prevent charging during engine cranking & discharging. The relay will automatically combine the batteries for charging when not under heavy loads.

• Designed for 12 or 24 volt systems
• 12/24 volt auto ranging voltage input
• Waterproof rated IP67—temporary immersion for 30 minutes
• Ignition protected—safe for installation aboard gasoline powered boats and cars
• Remote LED output indicates relay state away from ACR
• Supports high-output alternators up to 120 Amperes
• Dual sensing