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Victron Cyrix-ct 12/24-120 120A 12V/24V Intelligent Battery Combiner

The Cyrix Battery Combiner is a microprocessor controlled heavy duty relay that automatically connects batteries in parallel when one of them has reached a pre-set voltage (indicating that the battery is being charged) and disconnects when the voltage decreases below float level (indicating that one or more batteries are being discharged). Cyrix Battery Combiners are an excellent replacement for diode isolators. The main feature is that there is virtually no voltage loss so that the output voltage of alternators or battery chargers does not need to be increased.

Download specifications sheet here.

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Regular Price: R 976.35

Special Price Excl. Tax: R 742.61 Incl. Tax: R 854.00


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Product Description


Some battery combiners (also called voltage-controlled relay, or split charge relay) will disconnect a battery in case of a short but high amperage load. A battery combiner also may fail to connect a large but discharged battery bank because the DC voltage immediately drops below the disengage value once the batteries are connected. The software of the Cyrix-ct 12/24 does more than simply connect and disconnect based on battery voltage and with a fixed time delay. The Cyrix-ct 12/24 looks at the general trend (voltage increasing or decreasing) and reverses a previous action only if the trend has reversed during a certain period. The time delay depends on the voltage deviation from the trend.


  • Long bolts to allow connection of more than one power cable.
  • Protection against overheating (due to a long duration overload e.g.)
  • LED status indication (Cyrix 12/24 230 only).
  • 12/24 V auto ranging.
  • No voltage loss.
  • Prioritising the starter battery.
  • Bidirectional voltage sensing and power supply from both batteries.
  • Parallel connection in case of emergency (Start Assist).

Technical Specifications

  • LED status indication: No.
  • Continuous current: 120 A.
  • Cranking rating (5 seconds): 180 A.
  • Connect voltage: From 13 V to 13,8 V and 26 to 27,6 V with intelligent trend detection.
  • Disconnect voltage: From 11 V to 12,8 V and 22 to 25,7 V with intelligent trend detection.
  • Current consumption when open: <4 mA.
  • Current consumption when closed: 12 V: 220 mA 24 V: 120 mA.
  • Start Assist: Yes (Cyrix remains engaged for 30 seconds).
  • Control cable included (length 1 m): No.
  • Protection category: IP54.
  • Weight kg: 0,11.
  • Dimensions (h x w x d in mm): 46 x 46 x 80.

Additional Information

Additional Information

Disclaimer Please note that stock availability is subject to prior sales. Prices exclude delivery. The image serves as an example of what the product looks like and may differ slightly in appearance.
Guarantee/ Warranty 12 month product warranty
Amp Rating 100A


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