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

Victron Cyrix-Li-Charge 24/48V-230A: Intelligent Charge Relay for LiFePO4 Battery Systems

Precision Charge Control for Victron Lithium Battery Installations

The Victron Cyrix-Li-Charge 24/48V-230A is a microprocessor-controlled intelligent charge relay designed to integrate seamlessly with Victron VE.Bus BMS and LiFePO4 lithium batteries. It provides a reliable secondary layer of protection by managing the connection of high-current chargers, preventing cell overvoltage and over temperature conditions that can compromise battery lifespan and safety.

Unlike generic contactors or solenoids, the Cyrix-Li-Charge actively monitors both the BMS control signal and system voltages, ensuring chargers are only connected when safe. This reduces the risk of lithium battery damage and improves overall system reliability in 24V and 48V off-grid, marine, and automotive applications.

How the Cyrix-Li-Charge Protects Your Investment

In a Victron lithium system, the VE.Bus BMS acts as the primary safeguard. However, not all chargers can be directly controlled by the BMS. The Cyrix-Li-Charge bridges this gap by acting as a remote-controlled switch that engages or disengages the charger based on BMS commands and voltage thresholds.

• Immediate disconnection when the BMS signals cell overvoltage or high temperature, preventing irreversible cell damage.
• Automatic reconnection with a 3-second delay once conditions normalise, minimising downtime.
• Voltage-sensing logic ensures the charger is only connected when it is actively producing charge voltage (27.4V or 54.8V), avoiding unnecessary cycling.
• Built-in transient voltage suppression protects against voltage spikes during disconnection, safeguarding sensitive electronics.

Key Features and Benefits

• High continuous current rating: 230A at 24V, 80A breaking capacity at 48V, suitable for large charger banks and inverter/chargers.
• Low power consumption: Draws less than 4mA when open, preserving battery charge during storage.
• IP54 protection: Resistant to dust and water splashes, ideal for engine rooms and exposed installations.
• LED status indicator: Provides clear visual feedback on relay state (engaged, disengaged, connecting, alarm).
• Compact and lightweight: 65 x 100 x 50mm, 0.27kg, easy to mount in tight spaces.
• 3/8"-16 (Approx. M10) stud terminals accept heavy-duty lugs for secure, low-resistance connections.

Engineered for Demanding Environments

The Cyrix-Li-Charge is built to withstand the rigours of mobile and marine installations. Its sealed design (IP54) and robust terminals ensure reliable operation despite vibration, humidity, and temperature fluctuations. The included 1-metre control cable simplifies connection to the VE.Bus BMS, reducing installation time and potential wiring errors.

For system designers and installers, this relay eliminates the need for complex external control circuits, providing a plug-and-play solution that maintains the integrity of Victron's lithium ecosystem.

Applications

• Marine lithium battery systems with high-output alternators or shore power chargers.
• Off-grid solar installations using Victron inverter/chargers and MPPT controllers.
• RV and caravan power systems requiring automated charge disconnect for lithium batteries.
• Industrial backup power where battery safety and longevity are critical.

Take Control of Your Lithium Charging

Integrate the Victron Cyrix-Li-Charge 24/48V-230A into your energy system to ensure your lithium batteries are charged safely and efficiently. Add to your order today and build a more resilient power solution.

Specifications