SKU: 59434215843

Victron Cyrix-ct Intelligent Battery Combiner 12/24V-120A VSR

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Description

Victron Cyrix-ct Intelligent Battery Combiner 12/24V-120A VSRVictron Cyrix ct 120A Intelligent Battery Combiner for Dual Battery Systems Advanced Voltage Sensing Relay with Trend Detection for Reliable Parallel Charging The Victron Cyrix ct 12 24V 120A is a microprocessor controlled intelligent battery combiner that functions as a bidirectional voltage sensitive relay (VSR). Unlike conventional split charge relays that rely on simple voltage thresholds and fixed time delays, the Cyrix ct analyses the overall

Victron Cyrix-ct 120A Intelligent Battery Combiner for Dual Battery Systems

Advanced Voltage Sensing Relay with Trend Detection for Reliable Parallel Charging

The Victron Cyrix-ct 12/24V-120A is a microprocessor-controlled intelligent battery combiner that functions as a bidirectional voltage sensitive relay (VSR). Unlike conventional split charge relays that rely on simple voltage thresholds and fixed time delays, the Cyrix-ct analyses the overall voltage trend to prevent nuisance switching. This ensures your auxiliary battery bank charges reliably from the alternator or mains charger without premature disconnection under heavy loads or reconnection when surface charge dissipates.

Engineered for 12V and 24V automotive and marine electrical systems, the Cyrix-ct auto-detects system voltage and provides a continuous current rating of 120 A, making it suitable for charging large domestic battery banks, bow thruster batteries, and other onboard equipment. Its bidirectional sensing allows the combiner to engage when either battery reaches the connect voltage, so charging sources on either side can parallel the banks automatically.

Intelligent Trend Detection Eliminates Unwanted Cycling

Standard voltage-controlled relays often disconnect a battery when a short, high-current load causes a momentary voltage dip, or fail to connect a deeply discharged bank because the voltage collapses below the disconnect threshold immediately after engagement. The Cyrix-ct’s software monitors the rate and direction of voltage change over time, reversing a previous action only if the trend has genuinely reversed. The time delay adapts based on the deviation from the trend, providing stable operation in demanding conditions.

Key Features

  • 120 A continuous current rating with 180 A cranking assist for emergency parallel starts
  • 12/24 V auto-ranging detects system voltage automatically, no manual configuration needed
  • Bidirectional voltage sensing and dual power supply allows engagement from either battery, even if one is deeply discharged
  • Start Assist function via push button or switch provides 30-second emergency parallel connection
  • Over-temperature protection disengages the relay if contact temperature becomes excessive, re-engaging after cooling
  • Virtually zero voltage drop across the contacts, eliminating the need to increase alternator or charger output voltage
  • Prioritises starter battery by connecting auxiliary banks only after the starter reaches the connect voltage
  • Compact IP54-rated housing (46 x 46 x 80 mm) withstands dust and water spray in engine bays and marine compartments
  • Low power consumption: less than 4 mA when open, 220 mA (12 V) or 120 mA (24 V) when closed
  • 13 mm (M6) long stud terminals allow secure connection of multiple heavy-duty cable lugs

Reliable Parallel Charging Without Voltage Loss

Diode-based battery isolators introduce a voltage drop of 0.6–0.7 V, which can prevent full charging unless the alternator or charger is voltage-boosted. The Cyrix-ct uses a high-current relay with negligible contact resistance, so your batteries receive the full charging voltage. This makes it a direct, efficient replacement for diode isolators in 12V dual battery systems and 24V marine setups.

Emergency Start Assist for Peace of Mind

If your starter battery becomes discharged or damaged, the Cyrix-ct can be manually engaged using a momentary push button or switch connected to the Start Assist terminal. The relay remains closed for 30 seconds, allowing you to draw power from the auxiliary bank to crank the engine. This feature is invaluable for remote travel, off-grid work sites, and marine applications where a flat starter battery could leave you stranded.

Designed for Harsh Environments

With an operating temperature range of -40 to +60 °C and an IP54 protection rating, the Cyrix-ct is built to perform in engine compartments, bilges, and exposed vehicle installations. The fully sealed housing resists dust ingress and water spray, while the robust M6 stud terminals accept heavy-gauge cable lugs for secure, low-resistance connections.

Typical Applications

  • Charging a second battery in 4WD, caravan, and camper trailer dual battery systems
  • Marine installations with separate start and house battery banks
  • Bow thruster and windlass battery charging
  • Commercial vehicles and agricultural machinery with auxiliary power requirements
  • Off-grid solar systems where multiple battery banks need to be combined during charging

Installation and Wiring

The Cyrix-ct features clearly labelled M6 stud terminals for Battery 1 (Terminal 87) and Battery 2 (Terminal 30), plus spade terminals for the negative sensing wire (Terminal 86) and optional Start Assist switch (Terminal 85). A wiring diagram is included in the product images to guide installation. For systems requiring multiple engage/disengage profiles, consider the Victron Cyrix-i 400.

Upgrade Your Dual Battery System with Intelligent Control

Replace unreliable diode isolators and basic voltage-sensing relays with the Victron Cyrix-ct 120A Intelligent Battery Combiner. Its trend-detection logic, bidirectional sensing, and emergency start assist provide dependable parallel charging for your auxiliary batteries. Order today to ensure your onboard power system operates efficiently and reliably, wherever your journey takes you.

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: 59434215843

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L Bess
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★★★★★ 5
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Size: 2.32 Pound (Pack of 1), Style: New
I am very pleased with the Metamucil Premium Blend 4-in-1 Fiber Supplement. Shipping was prompt, and the container arrived well-packaged and sealed securely. There were no issues with leakage or damage, and it was ready to use right away. In terms of product quality, this fiber supplement performs exactly as expected. It’s made with psyllium husk fiber, which is known for supporting digestive health by helping trap and remove waste while promoting regularity. The powder mixes fairly well with water and has a smoother consistency than some other fiber products I’ve used. The orange flavor is mild and easy to drink, especially when mixed thoroughly and consumed right away. I noticed that with consistent use, it helped improve digestion and left me feeling lighter overall. The added benefit of prebiotic fiber support is also a plus, contributing to gut health over time. From a value standpoint, this product offers strong everyday utility. It combines multiple benefits—digestive support, heart health support, and appetite control—into a single supplement, making it more convenient than taking multiple products. Overall, this is a reliable, easy-to-use fiber supplement that delivers consistent results. I would confidently recommend it to anyone looking for a practical way to improve daily fiber intake and support digestive health.
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Reviewed in the United States on April 1, 2026
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Nyfranco
Carnegie, US
★★★★★ 5
Excellent for Digestive Health and Easy to Incorporate into Daily Routine
Size: 2.32 Pound (Pack of 1), Style: New
I've been using Metamucil Premium Blend for a while now, and it has been a great addition to my daily health regimen. This psyllium fiber powder supplement is particularly effective for improving digestive health. The fact that it's a 4-in-1 fiber supplement is impressive. It not only aids in regularity but also helps with maintaining healthy blood sugar levels, lowering cholesterol, and promoting digestive health. The orange flavor is pleasant, making it easy to drink, and it's great that it's sweetened with Stevia, making it a sugar-free option. I appreciate that this supplement is plant-based. It's a natural way to increase my daily fiber intake, and I've noticed a significant improvement in my digestive regularity since I started using it. The texture of the powder is fine and it mixes well with water, without forming clumps. The packaging is convenient, providing 180 servings, which is excellent for long-term use. It's easy to measure out each serving, and the container keeps the powder fresh. Using Metamucil Premium Blend daily has been a simple yet effective way to enhance my overall digestive health. It's a product I trust and feel good about incorporating into my health routine. For anyone looking to increase their fiber intake for digestive health, Metamucil Premium Blend is a great choice. It's effective, easy to use, and has a pleasant taste. Highly recommended!
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Reviewed in the United States on January 1, 2024
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sofi saint claire
Cuba, US
★★★★★ 5
Enjoyable to drink
Size: 2.32 Pound (Pack of 1), Style: New
Goood texture
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Reviewed in the United States on May 30, 2026
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Ryan Burns
San Leandro, US
★★★★★ 5
Lost Eight Pounds!!!
Size: 2.32 Pound (Pack of 1), Style: New
I mix two spoonfuls in a glass of orange juice every morning. In the past month I've lost eight pounds doing nothing different. Great product!
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Reviewed in the United States on May 24, 2026
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Raquel
Carnegie, US
★★★★★ 5
Won’t go a day without it
Size: 2.32 Pound (Pack of 1), Style: New, Size: 2.32 Pound (Pack of 1), Style: New
So much better than the sugar version which has SOOOO much sugar it gave me heartburn. Yes, the sugar version is tasty like Tang, but that sugar gave me indigestion. The aspartame version was disgusting. This Stevia is awesome. Because it doesn’t have tons of sugar, you only need 2 heaping teaspoons instead of 2 tablespoons of the regular. I think it’s delicious and also has natural coloring, the sugar version has artificial dyes. I drink it everyday and my GI tract has never been happier. Only one small issue, this size container (~14 oz) is narrow, so buy the bigger bottle (23 or 34?) so you can reach in to scoop it easily. I have zero bloating or gas and sometimes take it more than once per day. It supposedly decreases appetite if taken before meals. It expands in your gut! Perfect. Just don’t take it within 2 hours of oral meds/vitamins as it can supposedly decrease gut absorption. Enjoy the results!!
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Reviewed in the United States on July 3, 2025

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