Victron Cyrix-i Intelligent Battery Combiner 12/24V-400A
SKU: 80585654692

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

Sale price$172.23 Regular price$191.37
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Description

Victron Cyrix-i Intelligent Battery Combiner 12/24V-400AVictron Cyrix i 12 24V 400A: Intelligent Battery Combiner for Dual Battery Systems Advanced Voltage Sensing and Smart Switching for Reliable Parallel Charging The Victron Cyrix i 12 24V 400A is a microprocessor controlled intelligent battery combiner designed to manage dual battery systems in vehicles, boats, and off grid installations. Unlike conventional voltage sensitive relays (VSRs) that rely on simple voltage thresholds and fixed timers, the

Victron Cyrix-i 12/24V-400A: Intelligent Battery Combiner for Dual-Battery Systems

Advanced Voltage Sensing and Smart Switching for Reliable Parallel Charging

The Victron Cyrix-i 12/24V-400A is a microprocessor-controlled intelligent battery combiner designed to manage dual-battery systems in vehicles, boats, and off-grid installations. Unlike conventional voltage-sensitive relays (VSRs) that rely on simple voltage thresholds and fixed timers, the Cyrix-i analyses voltage trends to prevent nuisance switching caused by momentary loads or deeply discharged batteries. This ensures your auxiliary battery charges reliably without unnecessary cycling, extending the lifespan of your entire system.

With a continuous current rating of 400 A and a peak capacity of 2000 A, this combiner handles high-demand applications such as winching, bow thrusters, or large inverter loads. The auto-ranging input (8-36 VDC) automatically detects 12V or 24V systems, simplifying installation and reducing inventory complexity for installers.

Why Trend-Based Switching Matters

Standard battery combiners often disconnect under short, high-current loads or fail to engage a depleted battery bank because the voltage collapses below the disconnect threshold. The Cyrix-i overcomes these limitations by evaluating the voltage trend over time. It only reverses a connection if the trend direction changes for a sustained period, preventing false triggers and ensuring stable parallel operation. Four selectable timing profiles allow customisation for different battery chemistries and usage patterns.

Zero Voltage Drop for Maximum Efficiency

Diode-based isolators introduce a forward voltage drop (typically 0.6-0.7 V), requiring higher alternator or charger output voltages and wasting energy as heat. The Cyrix-i uses high-current relay contacts, resulting in virtually no voltage loss. This means your batteries receive the full charging voltage, improving charge efficiency and reducing strain on your alternator or charger.

Bidirectional Sensing and Dual Power Supply

The Cyrix-i monitors voltage on both connected batteries and can be powered from either side. If one battery is too low to operate the relay, the other battery provides the necessary power. This ensures the combiner engages even when the starter battery is deeply discharged, as long as the auxiliary battery has sufficient voltage. For safety, the unit will not close if either terminal voltage is below 2 V (12V), 4 V (24V), or 8 V (48V), preventing unexpected operation during installation or maintenance.

Emergency Parallel Start Feature

A built-in push-button or remote switch input allows manual parallel connection for 30 seconds, providing an emergency start assist if the starter battery is flat. This feature is invaluable for marine, RV, and off-road applications where a failed start could leave you stranded.

Key Features

  • 400 A continuous / 2000 A peak current rating for high-demand loads
  • Intelligent trend-based switching prevents nuisance disconnects and ensures reliable charging
  • Auto-ranging 12/24V detection simplifies installation and reduces setup errors
  • Virtually zero voltage drop compared to diode isolators, maximising charge efficiency
  • Bidirectional voltage sensing and dual power supply for robust operation
  • Emergency start assist via push-button or remote switch for peace of mind
  • Microswitch output for remote status monitoring
  • Compact, vibration-resistant design with durable metal mounting bracket

Built for Demanding Environments

Encased in a rugged housing with high-current copper terminals, the Cyrix-i is engineered for the harsh conditions of engine rooms, vehicle chassis, and marine installations. The bicolour LED provides at-a-glance status indication, while the microswitch terminals enable integration with remote monitoring systems. Weighing just 0.9 kg, it adds minimal weight while delivering industrial-grade reliability.

Applications

Ideal for dual-battery systems in 4WDs, caravans, motorhomes, boats, and commercial vehicles. Use it to combine a starter battery with an auxiliary deep-cycle battery, or to link multiple battery banks for charging from a single alternator or charger. The Cyrix-i is also suitable for 24V systems in trucks, buses, and heavy equipment.

Upgrade Your Battery Management Today

Replace unreliable diode isolators or basic VSRs with the Victron Cyrix-i Intelligent Battery Combiner and experience smarter, more efficient parallel charging. Order now to ensure your dual-battery system delivers dependable power when you need it most.

Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 80585654692

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BR
Whiting, US
★★★★★ 5
Durable Toy for Active Dogs
This ball is strong enough to handle daily play while keeping dogs entertained. It provides stimulation that helps reduce boredom and restlessness. The material feels tough but safe for dogs, and the interactive design makes it more exciting than a regular ball. It’s also lightweight enough for indoor or outdoor use. A smart choice for pet owners looking to keep dogs occupied.
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Reviewed in the United States on November 13, 2025
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Hope
New York, US
★★★★★ 5
Bright, easy to clean toy
This ball is a fun little addition for my big dog. The bright blue color really helps, it is easy to spot under the sofa or behind furniture. The outer shell feels durable, not soft rubber but springy enough to handle his chewing without marks. When switched on, it rolls around by itself and makes my dog chase it all over the living room, which is a good way to burn his energy on rainy days. The internal switch is hidden, which I like because my dog cannot open it with his teeth. It is simple to turn on and off, and so far, the movement works as described. The texture also resists hair sticking, and I can rinse it under water, and it looks clean again in seconds. For the price, it serves its purpose and gives my dog a short burst of excitement each day.
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Reviewed in the United States on October 10, 2025
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Tony
New York, US
★★★★★ 5
Fun and Tough Interactive Toy for My Big Dog
This interactive dog ball has been a great addition for my large dog. The ball’s material is very durable and holds up well even with heavy chewing. My dog usually destroys toys within days, but this one has lasted weeks and still looks great. The automatic play modes keep him active and entertained, especially when I’m busy. He loves chasing it both indoors and outdoors, and it helps release his energy. The battery life is decent, and the operation is simple. Overall, it’s a fun, sturdy, and smart toy that really keeps my dog busy and happy
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Reviewed in the United States on October 11, 2025
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kenny
Natrona Heights, US
★★★★★ 5
Finally, a Toy That Keeps My Dog Entertained and Active
I bought this interactive dog ball for my German Shepherd, who is very energetic and can be quite aggressive with his chewing. I've tried countless toys that either failed to hold his attention or broke within a week, but this ball is incredibly durable. The durable E-TPU material feels tough and flexible, yet lightweight, making it easy for him to carry around. The bright blue color makes it easily recognizable indoors or out, and I can spot it at a glance. The ball bounces and rolls in unpredictable patterns, keeping him alert and focused. When he tires of chasing, I switch it to slow mode so he can push the ball around easily. I've noticed he's calmer after playing in the evenings.
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Reviewed in the United States on September 27, 2025
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AmazonReviewer
Louisville, US
★★★★★ 5
Great way to keep my dog entertained!
My German Shepherd gets bored easily and tends to chew through most toys, but this interactive ball has been a lifesaver. The durable E-TPU material really holds up against his strong jaws. I love that it has 3 different play modes – it keeps him curious and busy for hours, both inside the house and in the backyard. A perfect mix of durability and fun!
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