Victron Energy Cyrix-i 24/48V-400A intelligent battery combiner
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Victron Cyrix Battery Combiner – Intelligent Relay for Automatic Battery Management
The Victron Cyrix Battery Combiner is a smart, microprocessor-controlled relay designed to automatically connect or disconnect batteries in parallel based on voltage conditions. It enables efficient charging and discharging across multiple battery banks, with virtually no voltage loss, making it an ideal replacement for traditional diode isolators.
Key Features
✔ Automatic Battery Connection & Disconnection
- Connects batteries in parallel when charging is detected (voltage threshold reached)
- Disconnects when voltage drops below float level (discharge detected)
✔ No Voltage Loss
- Unlike diode isolators, there’s no significant voltage drop
- Alternators and chargers operate at standard voltage levels
✔ Intelligent Battery Monitoring
- Monitors voltage trends instead of reacting to short-term fluctuations
- Prevents unwanted switching due to momentary high loads or sudden voltage drops
- Selectable switch timing profiles for tailored performance
✔ Auto-Ranging Voltage Detection
- Supports both 12/24 V and 24/48 V systems
- Automatically adjusts to system voltage without manual configuration
✔ Prioritizes Starter Battery Charging
- Alternator typically charges the starter battery first
- Accessory batteries are connected once starter battery reaches sufficient charge level
✔ Bidirectional Voltage Sensing
- Detects voltage from either battery bank
- Allows activation if the accessory battery is charged by an external source (e.g., charger)
✔ Dual Power Supply Design
- Operates even if one battery is too low to power the relay
- Will not engage if either battery voltage is critically low (below 2V/4V/8V depending on system voltage)
Manual Override Function
✔ Emergency Parallel Connection
- Manually connect batteries in parallel with a push button or switch
- Useful for starting the engine when the starter battery is discharged
- Maintains connection for 30 seconds
Applications
- Dual battery systems in vehicles and boats
- RVs and camper vans with separate starter and house batteries
- Marine systems with bow thrusters or auxiliary power banks
- Off-grid systems with multiple battery banks
No Specifications