Blue Sea Systems 7601 M-ACR Automatic Charging Relay 12V/24V 65A

The Blue Sea Systems M-ACR (Mini Automatic Charging Relay) is designed specifically for boats with outboard engines and small inboard engines equipped with 65 amp or less alternators. This intelligent relay automatically manages dual battery systems, making it ideal when adding a second battery to support larger stereos, trolling motors, fishfinders, or other marine electronics.

The M-ACR combines both batteries during charging for maximum efficiency, then automatically isolates the house battery during engine starts to protect sensitive electronics from voltage drops and electrical noise. Unlike traditional battery isolators, the ACR shares charging sources without creating voltage drop, ensuring both batteries receive optimal charging.

Key Features:

• Automatic dual battery management without external regulators or complex wiring
• Start isolation protection safeguards electronics during engine cranking
• Ignition protected design allows safe installation in gasoline engine compartments
• LED indicator light displays real-time ACR operating status
• Compact 2 7/8" x 2 7/8" x 2 5/8" footprint fits space-limited installations
• Compatible with Blue Sea Systems 360 panel systems
• Backed by Blue Sea Systems lifetime warranty

Technical Specifications:

• Nominal voltage: 12V or 24V systems
• Continuous rating: 65A
• Intermittent rating: 115A for 2 minutes
• Operating current: 90mA combined, 15mA open
• Closing voltage: 13.6V/27.2V (30 second delay)
• Opening voltage: 12.75V/25.5V (30 second delay)
• Terminal stud size: 1/4 inch
• Recommended cable size: 1/0 AWG to meet full rating
• Over-voltage lockout: 16V at 12V, 32V at 24V
• Under-voltage lockout: 5V at 12V, 19V at 24V

Simple installation requires no external regulators or additional wiring, making it an ideal plug-and-play solution for recreational boaters upgrading to dual battery systems.