Victron Energy Cyrix-ct 12/24V-230A intelligent battery combiner

Victron Energy Cyrix-ct 12/24V-230A Intelligent Battery Combiner

The Victron Cyrix-ct 12/24V-230A is a compact, intelligent battery combiner ideal for automotive, marine, and off-grid power systems. With automatic voltage detection and bidirectional operation, it seamlessly connects batteries for parallel charging—without the voltage drop associated with diode isolators.

This smart relay prioritizes the starter battery, protects against over-temperature, and includes LED status indication for easy diagnostics. It is perfect for systems needing a reliable, high-current solution at 12V or 24V.

Key Specifications

• Model – Cyrix-ct 12/24V-230A

• Type – Intelligent battery combiner / Voltage-sensitive relay

• System Voltage – 12V or 24V DC (auto-sensing)

• Continuous Current Rating – 230A

• Cranking Rating (5 seconds) – 500A

• Connect Voltage – 13 to 13.8V (12V) / 26 to 27.6V (24V) with intelligent trend detection

• Disconnect Voltage – 11 to 12.8V (12V) / 22 to 25.7V (24V) with intelligent trend detection

• Current Consumption (when closed) – 12V: 320 mA / 24V: 180 mA

• Current Consumption (when open) – <4 mA

• Start Assist Function – Yes (30-second manual override push button)

• LED Status Indicator – Yes (multi-color, indicates engaged, disengaged, connecting, disconnecting, temperature warnings)

• Control Cable (1m) – Included

• Protection Category – IP54 (dust/splash resistant)

• Weight – 0.27 kg (0.6 lbs)

• Dimensions (H x W x D) – 66 x 100 x 50 mm (2.6 x 4.0 x 2.0 in)

Features & Benefits

• Intelligent Voltage Trend Monitoring – Avoids false switching and ensures reliable battery connection based on actual charging behavior.

• Auto-Sensing 12/24V Operation – Automatically adapts to system voltage without manual configuration.

• Zero Voltage Drop – Unlike diode-based isolators, ensures full charging voltage reaches batteries.

• Bidirectional Sensing – Connects batteries when charge is detected on either bank.

• Starter Battery Priority – Ensures critical systems are charged before connecting auxiliaries.

• Overheat Protection – Automatically disengages in case of excessive contact temperature, re-engaging once cooled.

• Manual Override – Useful in emergencies to manually parallel the batteries using the Start Assist button.

• LED Diagnostics – Visual feedback for operating status, temperature warnings, and battery voltage conditions.