The Victron Energy Cyrix-ct 12/24V-120A Battery Combiner Kit is an intelligent battery management solution designed for vehicles and mobile power systems that require multiple batteries. Ideal for cars, boats, RVs, solar backup systems, off-grid setups, and commercial vehicles, this kit allows you to safely add a second or third battery while ensuring your starting battery is always protected.
Unlike traditional battery isolators, the Cyrix-ct uses microprocessor-controlled voltage sensing to automatically connect and disconnect batteries, ensuring optimal charging efficiency with virtually zero voltage loss.
Features & Benefits
- Automatic Battery Combining & Isolation: Detects charging voltage and connects batteries automatically, then isolates them when charging stops—protecting your starter battery at all times.
- 12V / 24V Auto-Sensing Operation: Works seamlessly with both 12V and 24V systems, making it ideal for mixed vehicle, marine, and solar installations.
- Zero Voltage Loss Design: Unlike diode isolators, it delivers full charging voltage to all batteries, ensuring faster charging and better battery health.
- Heavy-Duty 120A Continuous Rating: Supports high current loads, making it suitable for commercial vehicles, boats, RVs, and off-grid power systems.
- Microprocessor-Controlled Reliability: Intelligent control ensures precise switching, stable performance, and longer battery life even in demanding environments.
- Protects Starter Battery from Deep Discharge: Automatically disconnects auxiliary batteries when voltage drops, preventing unexpected vehicle or generator failure.
- Ideal Replacement for Diode Isolators: Eliminates energy losses, overheating, and inefficient charging commonly associated with traditional isolators.
- Simple Installation & Maintenance-Free Operation: No manual switches or adjustments required—perfect for professional installers and end users alike.
- Optimized for Solar & Alternator Charging: Works efficiently with solar chargers, alternators, and battery chargers, maximizing available power.
- Proven Victron Energy Quality: Built by a globally trusted brand, widely used across East Africa for durability and long-term reliability.
Use Cases
- Automotive Dual Battery Systems : Safely add a second battery to power accessories like audio systems, winches, lights, and inverters without draining the starting battery.
- Commercial & Utility Vehicles : Ideal for ambulances, service vans, and fleet vehicles that require reliable auxiliary power while ensuring engine start reliability.
- Solar Hybrid Systems : Combines battery banks charged by solar, alternators, or generators, making it suitable for off-grid and backup power installations.
- Marine & Fishing Boats : Protects the engine start battery while powering navigation equipment, lighting, fish finders, and onboard electronics.
- RVs, Campers & Caravans : Enables use of auxiliary batteries for refrigerators, lighting, fans, and charging devices during camping or long trips.
- Off-Grid Homes & Cabins : Automatically manages multiple battery banks to improve energy availability and extend battery life in remote locations.
- Emergency & Backup Power Systems : Ensures standby batteries remain charged and isolated until needed, providing reliable power during outages.
- Construction & Mobile Worksites : Powers tools, lighting, and mobile equipment while protecting vehicle starting batteries in demanding environments.
Value Propositions
- Never Get Stranded : Automatically isolates the starting battery when charging stops, ensuring your vehicle or generator always has power to start.
- Maximum Charging Efficiency : Zero voltage loss compared to diode isolators, allowing alternators, solar chargers, and generators to charge batteries faster and more effectively.
- One Solution for 12V & 24V Systems : Auto-detect voltage reduces installation errors and makes it ideal for mixed fleets and varied power setups.
- Lower Operating & Maintenance Costs : Intelligent automation eliminates manual battery switching and reduces battery wear and replacement frequency.
- Extended Battery Lifespan : Prevents deep discharge and uneven charging, helping batteries last longer in hot and demanding environments.
- Built for Harsh Conditions : Proven Victron Energy reliability suitable for Tanzania’s climate, including high temperatures and off-grid locations.
- Perfect for Solar & Mobile Power Systems : Seamlessly integrates with solar, alternator, and inverter-based systems used in homes, boats, RVs, and commercial vehicles.
- Professional-Grade Performance : Trusted by installers, solar companies, and fleet operators across East Africa for dependable power management.
- Scalable Power Management : Easily add a second or third battery without redesigning your entire electrical system.
- Long-Term Investment Value : Reduces downtime, protects expensive batteries, and improves overall system reliability.
Local Market Positioning in Tanzania
- Designed for Tanzania’s growing solar and off-grid market, supporting reliable power management in areas with unstable grid electricity
- Ideal for solar installers and EPC companies combining vehicle alternators, generators, and solar battery banks
- Strong fit for commercial vehicles such as delivery vans, safari vehicles, ambulances, and mobile service units
- Highly suitable for marine and fishing boats along the Indian Ocean coast and Lake Victoria, protecting starter batteries while powering onboard equipment
- Preferred solution for RVs, campers, and overland vehicles used in tourism and remote travel across Tanzania
- Supports 12V and 24V systems, matching common automotive, solar, and industrial battery setups used locally
- Reduces battery replacement costs, a key benefit in price-sensitive Tanzanian markets
- Trusted Victron Energy brand, widely recognized across East Africa for durability and long service life
- Reliable performance in hot, dusty, and demanding environments, common in urban and rural Tanzania
- Easy to install and maintain, making it suitable for local technicians and workshops
Technical Specification
| Specification | Details |
|---|---|
| Model | Cyrix-ct 12/24V-120A |
| System Voltage | 12V / 24V (auto-detect) |
| Continuous Current Rating | >120A |
| Maximum Voltage | 32V DC |
| Control Type | Microprocessor-controlled relay |
| Battery Compatibility | Lead-acid (AGM, GEL, Flooded) and compatible systems |
| Connection Type | Automatic voltage sensing |
| Voltage Loss | Near zero (no diode loss) |
| Operating Temperature | -20°C to +50°C |
| Protection Features | Starter battery isolation, automatic disconnection to prevent over-discharge |
| Installation Location | Vehicles, boats, RVs, off-grid solar systems |




