Victron Cyrix-Li-ct intelligent Li-ion Battery Combiner 12/24V-230A
Intelligent Lead-Acid to LiFePO4 Paralleling with VE.Bus BMS Control
Victron Cyrix-Li-Intelligent Charge Relay 12/24...DESCRIPTION
Advanced 12/24V 230A Lithium Battery Combiner
Intelligent Dual Battery Management for LiFePO4 Systems
The Victron Cyrix-Li-ct is a highly sophisticated, microprocessor-controlled heavy-duty relay designed explicitly for dual battery setups that combine a traditional lead-acid starter battery with a LiFePO4 (Lithium Iron Phosphate) auxiliary battery. Managing the connection between two fundamentally different battery chemistries requires precision. This intelligent relay ensures your batteries are safely paralleled for charging while protecting your sensitive lithium cells from improper voltage levels and extreme temperature conditions. Operating seamlessly at both 12V and 24V with a robust 230A continuous current rating, it is engineered for demanding marine, RV, and off-grid automotive applications.
Seamless VE.Bus BMS Integration
Lithium batteries require strict operational parameters to prevent permanent cell damage. The Cyrix-Li-ct is designed to work in perfect harmony with the Victron VE.Bus BMS (Battery Management System). It actively monitors the Charge Disconnect output of the BMS. If the BMS detects an imminent cell overvoltage or high internal temperature, the control output becomes free-floating, and the relay immediately disengages to protect the battery bank. It will parallel connect your lead-acid and lithium batteries only when the BMS authorises charging and the relay senses at least 13.4V (or 26.8V for 24V systems) on one of its power terminals.
Built-In Transient Voltage Suppression
Sudden disconnections under heavy charge loads can create dangerous voltage spikes, which pose a significant risk to connected sensitive electronics. To mitigate this, the Cyrix-Li-ct features a built-in transient voltage suppressor. This critical safety component absorbs and limits any hazardous voltage spikes that may occur when the relay suddenly opens due to a BMS alarm, ensuring the continued safety of your vehicle or vessel's electrical network.
Start Assist Functionality
In emergency situations where your lead-acid starter battery is depleted, the Cyrix-Li-ct includes a highly practical start assist feature. By applying a short positive pulse to the dedicated control terminal, the relay forces the contacts closed for 30 seconds. This temporarily bridges the lithium house battery to the starter battery, providing the necessary cranking current to start your engine, ensuring you are never left stranded in remote locations.
Key Features
- Intelligent parallel connection of lead-acid starter and LiFePO4 house batteries
- Robust 230A continuous current rating for demanding high-draw systems
- Direct integration with Victron VE.Bus BMS for superior cell protection
- Integrated transient voltage suppressor to prevent damaging electrical spikes
- Emergency start assist function bridges batteries for 30 seconds
- Automatic 12V and 24V system voltage detection
- Disengages immediately upon BMS alarm or when battery voltage drops below 13.2V
Clear LED Status Indication
Monitoring the real-time operational status of your dual battery system is made straightforward via the integrated blue LED indicator on the top of the unit. The LED provides immediate visual feedback:
- Solid LED: Relay is engaged and batteries are paralleled
- 10-second flash: Relay is disengaged
- 2-second flash: Connection is pending
- 2-second blink: Disconnection is pending
- 0.25-second rapid blink: Alarm state (triggered by over-temperature, high voltage exceeding 16V, both batteries below 10V, or one battery below 2V)
Optimise Your Off-Grid Power Architecture
Relying on generic isolation switches for mixed-chemistry battery banks can lead to suboptimal charging and potential cell damage. Integrating this sophisticated relay into your electrical system ensures that your investment in premium lithium storage remains fully protected. Upgrade your mobile power system with the Victron Cyrix-Li-ct 12/24V 230A today and ensure safe, efficient, and intelligent battery management for your next journey.
SKU: Vic-CYR010230412
SPECIFICATIONS
Specifications
| Model | Cyrix-Li-ct 12/24-230 |
|---|---|
| Application | Will Parallel Connect A Lead Acid Starter Battery And A LiFePO4 Battery |
| Continuous Current And Breaking Capacity At 12 V Or 24 V | 230 A |
| Breaking Capacity At 48 V | N.A. |
| Control Cable | Included (Length 1 m) |
| Control Input | The Cyrix Engages When The Control Input Is High (Appr. Battery Voltage). The Cyrix Disengages When The Control Input Is Left Free Floating Or Pulled Low. |
| Connect Voltage (12 V System) | 13.4 V < V < 13.7 V: 120 s; 13.7 V < V < 13.9 V: 30 s; V > 13.9 V: 4 s |
| Connect Voltage (24 V System) | 26.8 V < V < 27.4 V: 120 s; 27.4 V < V < 27.8 V: 30 s; V > 27.8 V: 4 s |
| Disconnect Voltage (12 V System) | V < 13.2 V: Immediate |
| Disconnect Voltage (24 V System) | V < 26.4 V: Immediate |
| Start Assist Function | A Short Negative Pulse Will Close The Relay During 30 Seconds |
| Transient Voltage Suppressor | Built-In |
| LED Status Indication | Yes; LED On: Engaged; LED 10 s Flash: Disengaged; LED 2 s Flash: Connecting; LED 2 s Blink: Disconnecting; LED 0.25 s Blink: Alarm (Over Temperature; Voltage > 16 V; Both Batteries < 10 V; One Battery < 2 V) (Multiply by Two for 24 V) |
| Current Consumption When Open | < 4 mA |
| Protection Category | IP54 |
| Weight | 0.27 kg (0.6 lbs) |
| Dimensions | 65 x 100 x 50 mm (2.6 x 4.0 x 2.0 inches) |
| SKU: | Vic-CYR010230412 |
| Barcode: | 8719076034346 |
| Model #: | CYR010230412 |
| MPN: | CYR010230412 |
WARRANTY
Victron Energy Limited Warranty Policy
Victron Energy warrants its products to be free from defects in workmanship and materials for a period of 5 years from the date of purchase by the end user, with a maximum of 66 months from the Victron Energy invoice date. Exceptions on this are: lead acid batteries; 2 years from date of purchase by the end user, with a maximum of 30 months from the Victron Energy invoice date, Lithium-ion batteries; 3 years from date of purchase by the end user. In addition to this proof of correct battery usage is required when making a battery warranty claim.
During this period, Victron Energy will, at its option, repair or replace the defective product free of charge. The warranty does not include performing or reimbursing de‐installation, transportation and re‐installation. This warranty will be considered void if the unit has suffered any physical damage or alteration, either internally or externally, and does not cover damages arising from improper use like:
• Reverse of battery polarity.
• Inadequate connection.
• Mechanical shock or deformation.
• Contact with liquid or oxidation by condensation.
• Use in inappropriate environment (dust, corrosive vapor, humidity, high temperature, biological infestation...).
• Breakage or damage due to lightning.
• Connection terminals and screws destroyed or other damages, like overheat, due to insufficient tightening.
• For any electronical breakage except due to lightning (reverse polarity, over‐voltage due to external cause), the state ofthe internal control diode and of the inputs/output X and Y capacitors determine the warranty.
This warranty will not apply where the product has been misused, neglected, improperly installed, or repaired by anyone else than Victron Energy or one of its authorized Qualified Service Partners. In order to qualify for the warranty, the product must not be disassembled or modified.
Repair or replacement are our sole remedies and Victron Energy shall not be liable for damages, whether direct, incidental,special, or consequential, even caused by negligence or fault.
Victron Energy owns all parts removed from repaired products. Victron Energy uses new or reconditioned parts made by various manufacturers in performing warranty repairs and building replacement products. If Victron Energy repairs or replaces a part of a product, its warranty term is not extended. In case of replacement the new component has a warranty of 6 months, without effect on the initial warranty period. All remedies and the measure for damages are limited to the above. Victron Energy shall in no event be liable for consequential, incidental, contingent orspecial damages, even if having been advised of the probability of such damages. Any and all other warranties expressed or implied arising by law, course of dealing, course of performance, usage of trade or otherwise, including but not limited to implied warranties of merchantability and fitness for a particular purpose, are limited in duration to a period of two (2) years from the date of purchase.
Life Support Policy
As a general policy, Victron Energy, does not recommend the use of any of its products in life support applications where failure or malfunction of the Victron Energy's product can be reasonably expected to cause failure of the life support device or to significantly affect its safety or effectiveness. Victron Energy does not recommend the use of any of its products in direct patient care. Victron Energy will not knowingly sell its products for use in such applications unless it receives in writing assurances satisfactory to Victron Energy that the risks of injury or damage have been minimized, the customer assumes all such risks, and the Liability of Victron Energy is adequately protected under the circumstances.
As a product requires service, it must be brought back to the place of purchase. In case no contact can be taken with the merchant, or if he is either unable or not allowed to provide service, direct contact should be taken with Victron Energy.
Warranty on Repairs
The warranty period on products or on printed circuits boards repaired by Victron Energy as well as on printed circuit boards for replacement is 6 months from delivery by Victron Energy.
Transport
It is the responsibility of the sender to sufficiently package these products. The transport must be organized in a way to avoid any damage, especially when a single unit or heavy unit is sent.
Severability
If a part of the terms and conditions set out above is held invalid, void or unenforceable due to any particular national or international legislation, it shall not affect other parts of the terms and conditions remaining.
For Australia only
Our goods come with guarantees that cannot be excluded under the Australian Consumer Law. You are entitled to a replacement or refund for a major failure and compensation for any other reasonably foreseeable loss or damage. You are also entitled to have the goods repaired or replaced if the goods fail to be of acceptable quality and the failure does not amount to a major failure.
Exotronic provides high-quality products and solutions tailored for B2B and commercial customers, including commercial businesses, caravan manufacturers, marine electricians, OEMs, as well as emergency services, and more.




