About this product
The RCT-AXPERT BMS BOX is a communications interface that enables seamless integration between Axpert series inverters and compatible lithium battery systems, allowing for dynamic control of charging, discharging and monitoring via RS485/RS232/USB protocols.
Overview Summary
RCT-AXPERT BMS BOX - a dedicated accessory designed to bridge RCT Axpert inverters and lithium-ion battery BMS units, providing enhanced control of charging voltage, current, discharge cut-off and system communication.
By installing this communications box between the inverter and the battery management system (BMS), users can configure the inverter to respond to real-time battery status: start or stop charging, adjust parameters based on battery cell conditions and support lithium systems from brands using compatible protocols such as Pylontech and Dyness.
Ideal for off-grid, hybrid and backup power installations in South Africa, this accessory enhances system reliability and ensures your inverter and battery bank communicate effectively for optimal performance.
Performance tier: Mid-range
Uses: Lithium battery integration, Inverter communication upgrade, Solar hybrid systems, Battery charge/discharge control, System monitoring
Description
The RCT-AXPERT BMS BOX is designed to act as a communication bridge between your RCT Axpert inverter (or similarly compatible units) and a lithium battery system that uses a BMS protocol recognised by the unit. The module features multiple ports (BMS port, RS485 monitor port, RS232 port, 5 V DC input) and provides LED indicators for connection status and communication feedback.
With compatibility for battery brands that use the Pylontech-style BMS protocol as well as Dyness and other compatible systems, the box enables your inverter to dynamically adjust its behaviour: setting charging voltage, controlling charge current, determining discharge cut-off voltage, and stopping or enabling charging based on the battery status.
Installation into an inverter / battery system is straightforward: the module connects via its RJ45 or USB ports, wiring into the battery BMS cable and into the inverter communication interface. Once configured, it becomes part of the control loop between inverter and battery, ensuring more efficient and safer operation of lithium-ion installations.
Features
Key benefits of the RCT-AXPERT BMS BOX:
- Multiple communication ports - includes BMS port, RS485 monitor, RS232 and USB to support various battery/inverter protocols.
- Automatic battery status control - enables the inverter to stop or start charging depending on the battery's condition.
- Customisable battery parameters - allows configuration of charge voltage, charge current, discharge cut-off and max discharge current based on battery BMS data.
- Compatible with major lithium systems - supports battery brands using Pylontech protocol, Dyness, and other Voltronic/BMS-protocol systems.
- Compact and easy to integrate - small module that mounts easily inside the system cabinet or near the inverter/battery interface.
- Monitoring support - permits use of monitoring software to view battery/inverter communication and system status.
What's in the Box
- 1 x RCT-AXPERT BMS BOX communications module
- 1 x RJ45 cable (battery BMS interface)
- 1 x RJ45 cable (inverter interface)
- 1 x USB cable
- 1 x User manual/documentation
Specifications
- Model: RCT-AXPERT BMS BOX
- Compatible systems: RCT Axpert inverter series + lithium battery systems (Pylontech/Dyness and compatible BMS protocols)
- Storage temperature range: 10 degreesC to +70 degreesC
- Ports: BMS RJ45 port, RS485 monitor RJ45, RS232 port, USB port, 5 V DC input voltage interface
- Functions: Configure charging voltage, charging current, discharge cut-off, max discharge current, auto start/stop charging based on battery state.
- Package contents: Module + RJ45 cables + USB cable + user manual.
FAQ
Q: What is the purpose of the RCT-AXPERT BMS BOX?
A: It serves as a communications module between compatible lithium battery systems (with BMS) and RCT Axpert inverters, enabling proper charge/discharge control and monitoring.
Q: Which battery systems are compatible with this module?
A: The module supports lithium battery brands using the Pylontech protocol, Dyness systems and other lithium systems that conform to the Voltronic/BMS protocols referenced in the documentation.
Q: Do I need special cables or software?
A: The box comes with RJ45 cables for BMS and inverter interface plus a USB cable; monitoring software may be provided or downloadable via the supplier-check the manual.
Q: Can I use this box with any inverter brand?
A: It is designed specifically for RCT Axpert series inverters (and compatible models using the same communication protocol). Compatibility with other brands is not guaranteed without verifying protocol support.
Q: What should I check before purchasing?
A: Ensure your inverter model supports the required communication protocol, verify that your battery BMS uses a compatible protocol, and confirm that the firmware versions align for communication to function correctly.
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