Pylontech LV-Hub Multi-Group CAN Bus Synchronization Guide
Updated 6 September 2026 · By SolarNevs Research Desk, Dealer surveys + verified sources · 2 sources · Method ↗
Key Takeaways
- The Pylontech LV-Hub is essential for connecting more than 8 parallel Pylontech battery modules to a Victron GX device.
- All Pylontech battery module DIP switches must be set to 000 when using an LV-Hub for proper communication.
- Correct CAN-bus cabling and GX device configuration (CAN-bus BMS 500 kbit/s profile, DVCC ON) are critical for system synchronisation.
- Batteries will disconnect for protection if operated outside safe ranges, such as below 44.5V or above 54V.
- Consult an authorised technician for any internal battery work or complex multi-group wiring beyond basic communication setup.
Why the Pylontech LV-Hub is Necessary for Large Battery Banks
The Pylontech LV-Hub is a critical accessory for Pylontech Low Voltage (LV) battery systems when an installation requires more than 8 parallel battery modules. While individual Pylontech battery models can connect up to 8 modules in parallel, the LV-Hub facilitates the expansion beyond this limit, enabling multi-group parallel operation and ensuring proper communication and synchronisation with a Victron GX device. Without the LV-Hub, larger battery banks would face communication limitations and potential operational issues.
Understanding Multi-Group CAN Bus Synchronization
In a solar energy system, the battery management system (BMS) is responsible for monitoring and controlling the battery's state, including voltage, current, and temperature, and communicating these parameters to the inverter or charge controller. For Pylontech batteries integrated with Victron systems, this communication occurs via a CAN bus connection to a Victron GX device.
When multiple battery modules are connected, especially in large parallel configurations exceeding eight units, a central point of communication is required to aggregate data from all battery groups and present a unified view to the GX device. This is the role of the LV-Hub. It acts as an intermediary, collecting BMS data from multiple battery groups and relaying it to the GX device, ensuring that the entire battery bank operates as a single, synchronised unit. This synchronisation is crucial for accurate State of Charge (SOC) reporting, charge/discharge current limits, and error handling across the entire system. The GX device then uses this information to manage the charging and discharging of the batteries by the connected Victron inverters and solar charge controllers.
Configuration for Pylontech LV-Hub Multi-Group Systems
Proper configuration of both the Pylontech battery modules and the Victron GX device is essential for multi-group CAN bus synchronisation.
Pylontech Battery Module DIP Switch Settings
When using an LV-Hub, the DIP switches on the Pylontech battery modules must be set to 000. The Victron GX device will not detect the battery if any other setting is used. This ensures that the individual battery modules are configured to communicate through the LV-Hub rather than attempting direct communication with the GX device.
Victron GX Device CAN-bus Profile and DVCC Settings
The Victron GX device requires specific CAN-bus and Distributed Voltage and Current Control (DVCC) settings to correctly interface with Pylontech batteries via the LV-Hub.
Setting Name | Specification / Action | Protocol / Location | Technical Reference |
|---|---|---|---|
Pylontech battery DIP switches (when using LV-Hub) | Must be set to 000 | Battery module | "The address DIP-switches must be set to 000 for correct operation, and the GX device will not detect the battery if you use any other setting." |
Victron GX CAN-bus profile | CAN-bus BMS (500 kbit/s) | GX device: Settings -> Services -> VE.CAN port | "Select the //CAN-bus BMS (500 kbit/s)// CAN-profile in the GX device. Menu path: //Settings -> Services -> VE.CAN port//." |
DVCC (Distributed Voltage and Current Control) | ON | GX device: Settings -> DVCC | "Next, go to Settings, DVCC, and configure as follows: \ | DVCC\ | ON\ | " |
Shared Voltage Sense | OFF | GX device: Settings -> DVCC | "Next, go to Settings, DVCC, and configure as follows: \ | Shared Voltage Sense \ | OFF\ | " |
Shared Temperature Sense | OFF | GX device: Settings -> DVCC | "Next, go to Settings, DVCC, and configure as follows: \ | Shared Temperature Sense \ | OFF\ | " |
Limit managed battery charge voltage | OFF (unless balancing issues) | GX device: DVCC menu | "The "Limit managed battery charge voltage" feature should be left OFF, unless you are experiencing "High Voltage" or "Internal Error" alarms." |
Communication Cabling and Termination
The correct communication cable and termination are vital for establishing a reliable CAN bus connection between the Pylontech LV-Hub system and the Victron GX device.
- GX device Requirement: A Victron GX device (e.g., Cerbo GX) is essential for CAN-bus communication, as it communicates the keep-alive signal, charge and discharge limits, error codes, and State of Charge (SOC %) between the batteries and the system.
- Cable Type Selection:
- For Pylontech US2000C/D, US3000C, UP5000, US5000, US5000B, and Force-L models, use the Victron VE.Can to CAN-bus BMS type A Cable, part number ASS030710018.
- For Pylontech US2000, US3000, and UP2500 models, use the Victron VE.Can to CAN-bus BMS type B Cable, part number ASS030720018.
- Cable Connection to Master Battery: Plug the communication cable, with the side labelled "Battery BMS," into the Pylontech CAN port of the master battery. The master battery is identified as the battery with the empty link port 0.
- Cable Connection to GX Device: If your GX device has a dedicated BMS-Can port, this should be used. If the GX device only has VE.Can ports, the VE.Can port profile must be changed to CAN-bus BMS (500 kbit/s) for the battery.
- CAN-bus Termination: Plug a VE.Can terminator into the other VE.Can socket on the GX device to properly terminate the CAN bus network.
When multiple groups of batteries are connected via an LV-Hub, the battery group number will be displayed in the cell voltage/temperature readings on the GX device, with the first two numbers indicating the group number. If no LV-Hub is used, the group number will always show as 01.
Installation Safety and Switchgear Requirements
Working with high-voltage battery systems requires strict adherence to safety protocols to prevent injury and equipment damage.
- Isolation: Before performing any wiring or maintenance on the battery system, ensure all power sources are isolated. This includes turning off AC breakers from the grid and inverter, disconnecting PV array DC breakers, and opening battery DC breakers.
- Personal Protective Equipment (PPE): Always wear appropriate PPE, including insulated gloves, eye protection, and non-conductive footwear, when working with batteries.
- Insulated Tools: Use only insulated tools to prevent accidental short circuits, especially when tightening or disconnecting battery terminals. A spanner across a battery bank can short hundreds of amps, leading to severe burns or fire.
- Battery Protection: Pylontech batteries are designed with internal protection mechanisms. They will disconnect to protect themselves if operation is attempted outside their safe operating range.
- Low Voltage Protection: Activates when the battery discharges to 44.5V or less.
- High Voltage Protection: Activates if the charging voltage exceeds 54V.
- Temperature Protection: The working discharge temperature range is from -10 to 50 degrees Celsius, and the charging temperature range is from 0 to 50 degrees Celsius. The Pylontech BMS will restrict the Charge Current Limit of the battery in cold weather to protect the cells.
- Authorised Technicians: Any work involving opening battery enclosures, re-terminating communication cables, or complex multi-group wiring should only be performed by authorised and qualified technicians.
What the Published Sources Do Not Tell You
While the provided documentation offers comprehensive guidance for integrating Pylontech LV-Hub systems with Victron GX devices, certain specific details regarding the LV-Hub itself are not explicitly covered.
- LV-Hub Specific DIP Switch Settings: The sources confirm that Pylontech battery module DIP switches must be set to 000 when using an LV-Hub. However, they do not detail any specific DIP switch configurations or baud rate settings for the LV-Hub unit itself.
- Detailed LV-Hub Wiring Diagrams: Although the role of the LV-Hub in multi-group setups and master battery positioning is explained, specific wiring diagrams for the LV-Hub's connections to multiple battery groups or the inverter are not provided. External Pylontech LV-Hub manuals are referenced but explicitly stated as unsupported for citation.
- LV-Hub Error Codes or Fault Modes: The available information details general Pylontech battery error codes and fault modes (e.g., 'Internal Error', 'High cell voltage' warning, Error #67, battery shutdown due to operating range exceedance). However, no specific error codes or fault modes directly attributable to the LV-Hub unit itself are documented.
- LV-Hub Physical Specifications: Details such as the dimensions, weight, power consumption, or specific port types of the LV-Hub are not provided in the referenced sources.
- LV-Hub Firmware Update Process: While a firmware version of v1.8 is noted for the LV-Hub in the details menu, information on the procedure for updating the LV-Hub's firmware is not available.
These gaps indicate that while the integration process is well-documented from the Victron perspective, specific operational and maintenance details for the LV-Hub itself may require consulting manufacturer-specific documentation not covered in the provided sources.
Frequently asked questions
What is the Pylontech LV-Hub used for?
The Pylontech LV-Hub connects more than 8 parallel Pylontech battery modules, allowing larger battery banks to communicate effectively with a Victron GX device.
How should Pylontech battery DIP switches be set when using an LV-Hub?
When using an LV-Hub, the Pylontech battery module DIP switches must be set to 000 for correct operation, as the GX device will not detect the battery otherwise.
Which CAN-bus profile should be selected on a Victron GX device for Pylontech batteries?
On the GX device, navigate to Settings -> Services -> VE.CAN port and select the CAN-bus BMS (500 kbit/s) profile for Pylontech battery communication.
What Victron DVCC settings are recommended for Pylontech batteries?
For Pylontech batteries, Distributed Voltage and Current Control (DVCC) should be ON, while Shared Voltage Sense and Shared Temperature Sense should be OFF in the GX device's DVCC menu.
What is the low voltage protection threshold for Pylontech batteries?
Pylontech batteries activate low voltage protection when the battery discharges to 44.5V or less, disconnecting to protect themselves.
References
- Victron Energy: Pylontech compatibility — accessed 29 August 2026
- buysolar.pk: Pylontech UP-5000 Lithium battery — accessed 29 August 2026
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