Victron Energy - 24/48V - Cyrix-Li Intelligent Load Relay 24/48V-230A

Intelligent Load Management for 24V and 48V Lithium Systems

Protecting your heavy-duty lithium battery bank is critical for long-term performance and reliability. The Victron Cyrix-Li-load 24/48V 230A relay module acts as a crucial second line of defence for your LiFePO4 batteries, stepping in where standard cell balancing finishes. Designed to communicate directly with a Victron VE.Bus BMS, this high-capacity disconnect switch ensures your power system remains safe from the damaging effects of cell under-voltage.

When running high-draw applications in marine vessels, off-grid cabins, or advanced mobile setups, not all connected appliances or inverters can be controlled directly by the BMS. This intelligent relay bridges that gap, allowing you to safely shut down non-compliant loads before they drain your cells below safe thresholds. Unlike standard battery combiners or charge relays, the Cyrix-Li-load is strictly dedicated to managing outbound power, severing the connection to your heavy consumers the moment safety limits are approached.

Precision Automated Load Disconnection

The operation is straightforward but highly effective. The relay module will instantly disengage the connected load when its control input from the VE.Bus BMS becomes free-floating, signalling an imminent cell under-voltage event. This rapid response prevents deep discharge, significantly extending the lifespan of your expensive battery bank.

Once the system detects that the battery voltage has recovered, such as when other loads drop off, the BMS output resets to high. The unit will then automatically attempt to re-engage the connection after a 30-second delay. To prevent rapid cycling, it limits itself to three re-engagement attempts before locking out. It will then remain disengaged until the battery voltage definitively rises to more than 26V or 52V (depending on your system voltage) for at least 30 seconds, indicating that the battery is actively being recharged.

Robust Hardware and Diagnostic Feedback

Using a standard, generic relay in a highly sensitive lithium setup can introduce severe risks, including failure to disconnect under load or delayed responses that lead to irreversible battery damage. By using a purpose-built Victron relay module, you ensure precise synchronisation with your system architecture.

Built for demanding power environments, this switch handles up to 230 amps of continuous current, making it ideal for substantial off-grid energy networks. It features heavy-duty M8 stainless steel main terminal bolts for secure, high-current load connections.

System troubleshooting is also simplified through a built-in bi-colour LED indicator, providing immediate visual feedback on the operational status. You can quickly identify if the relay is actively engaged, disconnecting, attempting to connect, or triggering an alarm code for scenarios like extreme temperatures or extreme voltage fluctuations.

Key Features

• Designed for seamless integration with the Victron VE.Bus BMS
• Safeguards LiFePO4 batteries against destructive under-voltage conditions
• High-capacity 230A continuous current rating for heavy-duty applications
• Compatible with both 24V and 48V DC battery systems
• Automated safety lock-out prevents rapid switching during low voltage events
• Clear LED status indicator for real-time diagnostic feedback
• Robust M8 stainless steel terminals for secure high-current connections

Enhance Your Lithium Power Protection

Ensure your valuable energy storage is fully protected against deep discharge. Add this intelligent load relay to your 24V or 48V Victron energy system today for reliable, automated battery management and peace of mind.

Specifications