SKU: 33978921667

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: 33978921667

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Norman Shurtleff
Massapequa, US
★★★★★ 5
Great ipad
Style: Wi-Fi, Size: 128GB, Color: Blue, Configuration: Without AppleCare+
I recently purchased the Apple iPad 11-inch with the A16 chip, and I couldn’t be happier with the performance. The speed and responsiveness are outstanding, whether I’m browsing the internet, streaming videos, handling work tasks, or using multiple apps at once. The 11-inch display is bright, crisp, and provides excellent color quality, making it perfect for watching movies, reviewing documents, and viewing photos. The battery life easily lasts throughout the day, even with heavy use. The A16 chip delivers smooth performance with virtually no lag, making multitasking effortless. Apps open quickly, and everything runs seamlessly. The lightweight design makes it easy to carry around, whether for business, school, or travel. The camera quality is impressive for video calls and document scanning, and the overall build quality feels premium, as expected from Apple. Overall, the Apple iPad 11-inch with the A16 chip is an excellent investment for anyone looking for a powerful, reliable, and versatile tablet. It combines speed, portability, and ease of use into one outstanding device. Highly recommended!
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Reviewed in the United States on June 6, 2026
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W. T. Traylor
Carnegie, US
★★★★★ 5
It’s an iPad that works great
Style: Wi-Fi, Size: 128GB, Color: Silver, Configuration: Without AppleCare+
Super easy to setup using my wife’s older iPad. With a good case it is very durable and the unit was new.
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Reviewed in the United States on June 7, 2026
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John Jones
San Leandro, US
★★★★★ 5
Clear display
Style: Wi-Fi, Size: 128GB, Color: Blue, Configuration: Without AppleCare+
I got this to replace an old iPad Pro. It does everything my old pro did, except for having a smaller screen. Good value and set up and migration from old iPad was super easy. Good battery life and so far playing games on it haven't been an issue
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Reviewed in the United States on May 30, 2026
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Pug lover
Fort Morgan, US
★★★★★ 5
New Ipad
Style: Wi-Fi, Size: 256GB, Color: Yellow, Configuration: Without AppleCare+
Nice size with a nice clear picture. Replaced a very old iPad. Not all apps and things transferred like the iPhone. But very manageable with a little time. So far I am pleased with this iPad.
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Reviewed in the United States on June 6, 2026
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Mads
Los Angeles, US
★★★★★ 4
Its Great! Except one tiny detail
Style: Wi-Fi, Size: 512GB, Color: Pink, Configuration: Without AppleCare+, Style: Wi-Fi, Size: 512GB, Color: Pink, Configuration: Without AppleCare+
Ipad works great, easy to set up and everything transferred from the cloud from a backup I had (thank god because my other ipad is completely dead). Everything is in order except they put the magnets in the wrong spot xD. It doesnt matter functionality wise and I feel its more hassle to exchange than its worth so I am going to keep the iPad. With the case its in it doesnt really matter because theres a spot already for the pen. 4/5 stars
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Reviewed in the United States on May 13, 2026

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