Automatic charge relay ML-ACR Lithium with DTM control 12 V 500 A

The BLUE SEA ML-ACR Lithium automatic charge relay is a smart battery isolator designed to manage charging between different battery banks in a marine or recreational vehicle system. It automatically combines batteries for charging when one is being charged, and isolates them to prevent a depleted battery from draining the other. This model is specifically optimized for systems using lithium batteries.

Its primary function is to intelligently manage battery charging and isolation. It automatically combines battery banks to optimize charging from a single source (alternator, charger) and isolates them when voltage is low to protect the starter battery and ensure it remains charged for engine start.

The ML-ACR Lithium relay is designed to meet the specific charging and discharging requirements of lithium batteries. It integrates optimized voltage thresholds for these batteries, which differ from those of traditional lead-acid batteries, ensuring safe and efficient management without damaging the lithium batteries.

This relay has a DC current capacity of 500 A, making it suitable for high-power electrical systems that require managing significant currents during charging or battery bank combination.

The magnetic latching technology allows the relay to hold its position (open or closed) without consuming current once activated. This significantly reduces the relay's power consumption, a major advantage for embedded systems where every ampere-hour counts.

Yes, it provides start-up isolation. This function prevents voltage drops in sensitive equipment when starting the engine by isolating the service battery. Additionally, it ensures the starter battery remains sufficiently charged to start the engine, even if the service batteries are discharged.

The emergency parallel function allows manual combination of battery banks when needed. For example, if your starter battery is low, you can use this function to draw power from your service battery bank to start the engine, providing a quick troubleshooting solution.

Yes, the ML-ACR Lithium relay is designed with robustness suitable for demanding marine environments. Its construction and materials are selected to resist corrosion, moisture, and vibrations typical of nautical applications.

Installation requires basic knowledge of marine electrical systems. If you are not familiar with boat wiring, it is recommended to have a qualified professional handle the installation. The relay must be connected to the batteries, ground, and potentially to a remote control switch and the DTM input.

For correct installation, you will need battery cables of suitable cross-section to handle 500 A, terminals, a remote control switch (if desired), and overcurrent protection via fuse or circuit breaker on the positive lines to the batteries. A dry and well-ventilated location is also recommended.

Yes, it is essential to install appropriately sized 500 A fuses or circuit breakers on the positive cables connected to the batteries, near each battery. This protects the system and cables in case of short-circuit or overload.

The relay has terminals for connecting to the starter battery and the service battery (or service battery bank). There is also a terminal for ground (system negative) and terminals for remote control and DTM input. Detailed wiring diagrams are provided in the product user manual.

The relay should be installed in a dry location, easily accessible for inspection and maintenance, and close to the batteries it manages. It must be securely mounted on a flat surface not subject to excessive vibration. Avoid areas directly exposed to spray or excessive heat.

The ML-ACR Lithium relay is designed to operate automatically with predefined voltage thresholds optimized for lithium batteries. It typically does not require complex software configuration after installation, beyond correct cable connections and the control switch if used.

Yes, this relay is designed to operate in mixed systems, typically with a lead-acid starter battery and one or more lithium service battery banks. Its voltage thresholds are optimized to safely manage charging between these two battery types.

No, this specific model (ML-ACR Lithium 12 V 500 A) is designed and calibrated for 12 V electrical systems. Using it in a 24 V system may cause malfunctions or damage. Blue Sea Systems offers relay models suitable for 24 V systems if needed.

Compatibility with trolling motors depends on the motor's ability to provide a DTM (Digital Trolling Motor) signal compatible with the relay. It is advisable to check your trolling motor's specifications and the relay's documentation to ensure full compatibility of the control signal.

The ML-ACR Lithium relay is designed to manage charging between a starter battery and a house battery bank. If you have multiple house battery banks that you wish to manage individually or combine, you may need additional relays or a specific wiring configuration with busbars to merge them into a single "house bank" for the relay.