Victron Cyrix Battery Combiner

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  • Regular price R 887.34
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The Victron 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.


There are a number of variations of the Cyrix, and the differences are explained below: 

- Cyrix-ct
- Cyrix-Li-ct
- Cyrix-Li-Load
- Cyrix-Li-charge

The Cyrix-ct models are conventional battery combiners for 12 or 24 volt for lead acid, AGM or gel batteries. They automatically sense system voltage and self adjust for 12 or 24 volt systems. The Cyrix-Ct has bi-directional smart sensing and will combine if it detects that either battery is being charged. It will use the trend of the voltage sensed as well as the actual voltage to determine when to combine. Available in 120 Amp and 230 Amp versions

The Cyrix-i model is a conventional battery combiner for lead acid, AGM or gel batteries and has a 400 amp rating.The relay is not in a sealed enclosure.

The Cyrix-Li-ct models are a modified version of the Cyrix-Ct for use with Lithium batteries that have an external BMS. It allows the BMS to control the Cyrix in such a way that it will not allow the Cyrix to combine unless the "Allow to charge" signal is received from the BMS. The Cyrix-Li-Ct does not have a manual override button.  Available in 120 Amp and 230 Amp versions.

The Cyrix-Li-Load is a relay that goes between a Lithium battery fitted with an external BMS and a load. It is controlled by the BMS "allow to discharge" wire and will stay on all the time that the "allow to discharge" is in an on state. Available for 12/24V systems or 24/48V systems.

The Cyrix-Li-charge models goes between a battery charger and a Lithium battery fitted with an external BMS. It will allow charging as long as the BMS "allow to charge" signal is active.