Blue Sea 7623100 ML ACR Charging Relay 24V 500A w/Manual Control & Deutsch Connector

The Blue Sea 7623100 ML ACR Charging Relay 24V 500A with Manual Control & Deutsch Connector is designed for heavy-duty auxiliary battery charging systems in commercial vehicles, emergency response units, and specialized automotive applications where reliable dual-battery management is essential. This intelligent relay automatically isolates and charges secondary batteries while protecting your primary starting battery from over-discharge, making it vital for trucks, mobile command vehicles, and expedition rigs that require sustained auxiliary power for various applications.

Built on Blue Sea Systems' proven ML (Maximum Load) ACR platform, this relay monitors battery voltage differential in real time and engages the charging circuit when alternator output exceeds secondary battery voltage—typically within moments of engine start. The relay features a manual control override that allows technicians to force charging or isolation independent of voltage sensing, enabling diagnostic verification and emergency battery cycling. The sealed Deutsch connector housing resists corrosion and vibration, making it suitable for harsh underhood and mobile environments.

This relay is ideal for those who need reliable dual-battery management in demanding conditions, ensuring that auxiliary power is available for winches, compressors, lighting, or onboard electronics. Its compact design and lightweight construction simplify installation, making it a practical choice for various applications where auxiliary power is critical.