Victron Cyrix-i 12/24V-400A Intelligent Battery Combiner

CYRIX - microprocessor controlled 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 preset voltage (indicating that the battery has been charged) and disconnects when the voltage decreases below float level (indicating that one or more batteries have been discharged).

No voltage loss
Cyrix battery separators 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.

Prioritising the starter battery
In a typical setup the alternator is directly connected to the starter battery. The accessory battery and possibly also a bow thruster and other batteries are each connected to the starter battery by Ciryx battery combiners.
When a Ciryx senses that the starter battery has reached its connect voltage will engage, to allow for parallel charging of the other batteries.

Bidirectional voltage sensing
The Ciryx senses the voltage of both connected batteries. It will therefore also engage if for example the accessory battery has been charged by a battery charger.

Parallel connection in case of emergency
The Cyrix can also be engaged with a switch to connect manually batteries in parallel. This is especially useful in case of emergency when the starter battery is discharged or damaged.

12/24V auto ranging with Cyrix-i
The Cyrix-i 12/24-100 automatically detects system voltage.

Specifications:
Model:  i 12/24-400
Continuous current: 400A
Peak current: 2000A
Connect voltage: 13÷13.8V and 26÷27.6V
Disconnect voltage:  10,5÷12.8V e 21÷25.6V
Dimensions  mm ("): 78x102x110 (3.0x4.0x4.3))
Weight kg (lbs): 0.9 (1.9)