Victron Cyrix-Li-charge 12/24V-230A intelligent charge relay - CYR010230430

Overview

The Victron Cyrix-Li-Charge is a lithium-safe charger relay designed to intelligently connect and disconnect battery chargers in LiFePO₄ battery systems. Working in conjunction with the VE.Bus BMS, it ensures safe charging while protecting lithium cells from overvoltage and overtemperature events.

Through voltage sensing and advanced control logic, the Cyrix-Li-Charge delivers reliable, automated charger management for modern lithium battery installations.

Key Features

Intelligent Charger Control

• Connects the battery charger with a 3-second delay when conditions are met
• Requires Charge Disconnect output of the VE.Bus BMS to be high
• Engages when charger terminal senses ≥13.0V (12V), ≥26.0V (24V), or ≥52.0V (48V)
• Requires ≥2V present on the battery terminal

Immediate Safety Disconnect

• Disengages instantly if the BMS control input becomes free floating
• Responds to cell overvoltage or overtemperature conditions

Automatic Reconnect Logic

• Reconnects the charger after 3 seconds once alarms are cleared
• Performs a disconnect after 1 hour to verify charger operation
• Automatically re-engages if charger voltage rises again

Optimised for Lithium Systems

• Prevents uncontrolled charging of LiFePO₄ batteries
• Ensures safe, BMS-compliant charger operation