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Victron Cyrix-i 12/24V 225A

Excl. Tax: £79.63 Incl. Tax: £95.56

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Victron Cyrix-i 12/24V 225A Battery combiner
225A, Battery combiner.

Stock code: 401054
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Availability: Out of stock


The Cyrix-i battery combiner is a microprocessor controlled heavy duty relay that automatically connects batteries in parallel when one of them has reached a preset 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-i 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.

Intelligent battery monitoring to prevent unwanted switching
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-i 12/24 does more than simply connect and disconnect based on battery voltage and with a fixed time delay. The Cyrix-i 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 of time. The time delay depends on the voltage deviation from the trend.
(for Battery Combiners with multiple engage/disengage profiles, please see the Cyrix-i 200A-400A)

Cyrix battery combiner  Cyrix-i 12/24-120
Continuous current 120 A
Cranking rating (5 seconds) 180 A
Connect voltage

From 13V to 13,8V and 26 to 27,6V
with intelligent trend detection

Disconnect voltage

From 11V to 12,8V and 22 to 25,7V
with intelligent trend detection

Current consumption when open <4 mA
Start Assist  Yes (Cyrix remains engaged during 30 seconds)
Protection category  IP54
Weight kg (lbs) 0.11 (0.24)

Dimensions h x w x d in mm
(h x w x d in inches)

46 x 46 x 80
(1.8 x 1.8 x 3.2)