Victron Cyrix-i Intelligent Battery Combiner 24/48V-400A
SKU: 96842793850

Victron Cyrix-i Intelligent Battery Combiner 24/48V-400A

Sale price$179.41 Regular price$199.35
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Description

Victron Cyrix-i Intelligent Battery Combiner 24/48V-400AAdvanced 400A Battery Combining for 24V and 48V Systems The Victron Cyrix i is a heavy duty, microprocessor controlled battery combiner designed to safely and efficiently manage multi battery configurations. Ideal for marine vessels, large off grid power setups, and commercial vehicles, this robust 400A relay automatically connects batteries in parallel when one has reached a preset charge voltage, and disconnects them when the voltage drops below the

Advanced 400A Battery Combining for 24V and 48V Systems

The Victron Cyrix-i is a heavy-duty, microprocessor-controlled battery combiner designed to safely and efficiently manage multi-battery configurations. Ideal for marine vessels, large off-grid power setups, and commercial vehicles, this robust 400A relay automatically connects batteries in parallel when one has reached a preset charge voltage, and disconnects them when the voltage drops below the float level.

Unlike traditional diode isolators, the Cyrix-i introduces virtually no voltage drop. This critical efficiency eliminates the need to increase the output voltage of alternators or battery chargers, ensuring maximum power delivery. The unit automatically detects either 24V or 48V system voltages, making it a highly versatile component for demanding electrical architectures.

Intelligent Trend-Based Monitoring

Standard battery combiners often struggle with short, high-current loads, disconnecting batteries prematurely if the system voltage dips temporarily. Conversely, they might fail to connect a heavily discharged battery bank because the sudden inrush current instantly pulls the voltage below the disengage threshold. The Cyrix-i solves these issues using intelligent software that monitors general voltage trends rather than reacting to sudden spikes or drops. It will only reverse a switching action if a voltage trend has reversed over a specified time period, which dynamically adjusts based on the severity of the voltage deviation. Installers can also select from four distinct switch timing profiles to suit specific system parameters.

Bidirectional Sensing and Priority Charging

In typical setups, the alternator connects directly to the starter battery. The auxiliary battery, along with heavy loads like bow thrusters, connects to the starter battery via the Cyrix combiner. The system prioritises the starter battery, only engaging parallel charging for auxiliary banks once the primary battery is adequately charged.

Featuring bidirectional voltage sensing, the unit also engages if the auxiliary battery receives a charge from an independent source, such as a solar array or mains battery charger. A dual power supply ensures the internal relay remains operational even if one battery's voltage drops significantly. To prevent unexpected activation during maintenance, fail-safes prevent engagement if connection voltages fall below critical levels (below 4V for 24V systems, or 8V for 48V systems).

Built for Emergency Preparedness

For critical situations where a starter battery is heavily depleted or damaged, the system includes an emergency parallel connection feature. This start assist function can be triggered manually via a push button or remote switch, locking the relay closed for 30 seconds to allow engine starting directly from the house or auxiliary battery bank.

Hardware Built for Professional Installations

The physical design features heavy-duty metal studs to securely accommodate large gauge battery cables, sustaining optimal current flow under peak 400A loads. A front control connector allows for easy integration of the start assist trigger, while an integrated multi-colour status LED provides clear operational monitoring. Side-mounted auxiliary micro switch contacts are also included for remote status tracking.

Key Features

  • Auto-ranging capability detects 24V and 48V system voltages automatically
  • Zero voltage loss design outperforms traditional diode isolators
  • Intelligent trend-based monitoring prevents unwanted nuisance switching
  • Bidirectional sensing allows for charging and voltage detection from either connected battery
  • Emergency start assist function enables manual parallel connection for engine starting
  • Four selectable switch timing profiles for tailored system integration
  • Heavy-duty terminals and an integrated mounting bracket ensure a secure, robust installation

Complete Your Power System

Ensure your auxiliary and starter batteries are always properly managed and ready for heavy loads. Add the Victron Cyrix-i 400A Intelligent Battery Combiner to your 24V or 48V electrical system today to experience seamless, high-efficiency power distribution.

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: 96842793850

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Valhalla49
Grantham, US
★★★★★ 5
When they said strong...
...they weren't kidding. Our pup would chew through everything she could get her sharks teeth into. Like my arms. Nothing lasted as long as a week or maybe two. But she has had Dino for months now. She loves him. He is the go to toy for when she wants to play tug. The material used to make this toy is every bit as strong as the seller claims. I will definitely buy from them again. And I will not wait for this one to rip. I may be waiting a long time. If your pup likes to tear stuff apart, feel safe in buying this toy, UPDATE: 2/9/2023 Dino finally succumbed to the torture. His back ripped open and despite trying to repair him with ordinary thread he couldn't withstand the pressure, His stuffing was removed and spread all over the living room. Completely emptied he is still a good toy. Strong enough to withstand the forceful play of tug-o-war. Only thing I would suggest is to use something stronger when closing his back. The rest of him is great. I will be replacing him soon.
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Reviewed in the United States on January 30, 2023
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Rachel
Massapequa, US
★★★★★ 4
Not so tough
Size: Mini, Color: Gator (Pink)
I bought this because I dog sit. The dog chews up every. Single. Toy. So I bought it since it was cheap and it can be in the “chunk” (the dog’s name) toy box. It is not durable at all. He tore it up just as fast as a cheaply made toy. Chunk LOVES it! He would not stop playing with it. He loves the squeakers, it is a perfect size for him to throw it up in the air and chase it, and he loved ripping the legs off. It is good for my husband and I because there is little to no fluff. However, it is the perfect size to drop behind the couch and not be able to get. So once he drops it behind the couch, he won’t get it until morning. Now for my dog’s rating. My dog loves this toy too. He is much more gentle with toys (he has $5 Walmart toys we bought him back in 2020 in perfect condition that he plays with them every day). Before Chunk came over for the weekend, my dog Ted played with this. Ted is a larger small dog and chunk is a smaller small dog. And it is still the perfect size for both dogs.
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Reviewed in the United States on April 26, 2026
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Verified Purchase
Scott T
Port Orchard, US
★★★★★ 5
Tough
Size: Large, Color: Dinos Frills (Pink)
Tough dog toy that's held up through multiple washes! My dogs love the squeaker. They are not destructive chewers so I can't really say how it would hold up with that kind of dog though.
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Reviewed in the United States on June 8, 2026
O
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ocd_reader
Whiting, US
★★★★★ 5
Cute and well made my dogs love it.
Size: Mini, Color: Gator (Pink)
Cute little toy definatly for small toy sized dogs. This toy is bright and colorful and well made. My little dog likes it very much and tosses it around all the time. Great toy for fetch.
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Reviewed in the United States on May 5, 2026
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MW
Grantham, US
★★★★★ 1
Squeaker inside toy breaks after 2 days
Size: Mini, Color: Gator (Pink)
Bought for my 8 lb chihuahua for Christmas. I have 3 little girls. The youngest loves her toys and of course she took this one over immediately. She just loved everything about it. The material on the gator is amazingly durable and I believe would hold up for a good while. The squeaker inside the toy however, broke after 2 days of my girl playing with it. It's now a noiseless toy that she does not like too much as it does not squeak because it only had the one squeaker in it. I would recommend that 2 squeakers be inserted into this gator. I would not purchase again due to the longevity of the squeaker...only lasted 2 days.
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Reviewed in the United States on January 5, 2026

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