Victron Energy Cyrix-Li-ct 12/24-230A Battery Isolator Relay

Victron Energy Cyrix-Li-ct 12/24-230A – Automatic Battery Combiner for Lithium Batteries

The Victron Energy Cyrix-Li-ct is an electronic battery isolator relay specifically designed for lithium-ion batteries. It automatically connects two batteries in parallel when a charging voltage is present and disconnects them under undervoltage to prevent deep discharge.

• Reliably protects your lithium battery from harmful deep discharge, extending its service life
• Automatic parallel connection during charging ensures efficient energy distribution between starter and house battery
• Suitable for 12V and 24V systems – flexible use in RVs, boats, and solar installations
• High continuous current rating of 230A enables use even in powerful systems
• Compact housing and simple installation save space and mounting time

What sets the Cyrix-Li-ct apart

Unlike simple diode isolators, the Cyrix-Li-ct operates without significant losses or heat generation. The intelligent control electronics automatically detect the charging voltage and switch reliably without external control wires. The integrated undervoltage disconnect prevents the starter battery from being drained by the load.

Ideal for...

This battery isolator is especially suitable for owners of RVs, sailboats, and motorboats, as well as off-grid solar systems with lithium batteries. It is also the optimal solution in commercial vehicles and off-grid applications where two batteries need to be safely separated and charged together.

How to use the Cyrix-Li-ct

Install the relay between the starter battery and the house battery. Connect the charging cable to the Cyrix terminals – detection is automatic. Connect the positive and negative poles according to the included manual. For 12V systems, the relay engages at approx. 13.3V and disengages at approx. 12.5V; for 24V systems the thresholds are doubled. No separate control wire required.