M-ACR Automatic Charging Relay

The M-ACR Automatic Charging Relay automatically combines two battery banks during charging and isolates them during discharge or starting to help protect sensitive electronics.

Key Features

• LED light indicates ACR states.
• Designed for dual-battery bank management by automatically combining batteries during charging and isolating during discharge/starting.
• Surface, rear, or front panel mounting options.
• Snap-on cover helps insulate terminal connections to help prevent short circuits.

Product Compatibility

• Dual-battery charging systems (start/house or similar setups).
• Marine battery bank isolation and automatic charging relay applications.

Product Details

• SKU: 661-7601.
• Product type: Automatic Charging Relay (ACR).
• Function: automatically combines two battery banks during charging; isolates batteries during discharge or starting.
• Mounting: supports surface, rear, or front panel mounting options.
• Indicator: LED indicates ACR states.
• Protection: includes a snap-on cover to insulate terminal connections.
• Item weight (variant): 272 grams.

Parts Desk Insights

Best Use Case: Use this ACR to manage charging between two battery banks (such as start and house) so both banks get charged when charging voltage is present, while helping maintain isolation during discharge and engine starting.

Common Issues: If you dont see expected behavior, verify the wiring polarity and ground, confirm that the ACR is sensing charging voltage on the intended bank(s), and ensure the snap-on cover is installed to protect and insulate terminal connections.

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