TBMS-S51-8
Battery Management System SolaX TBMS-S51-8 for high-voltage storage tower TSYS-HS51. Manages 2 to 8 TP-HS51 modules of 5.1 kWh each per tower (10.2–40.8 kWh); with Series Box expandable up to a total of 66.5 kWh. Max charge/discharge current 70A. Communication CAN + RS485, protection rating IP66. Integrated battery heating, remote diagnostics and firmware updates. Off-grid functionality with SolaX hybrid inverter. Base included. Dimensions: 600×225×376 mm — Weight: 18.5 kg.
The SolaX TBMS-S51-8 is the Battery Management System (BMS) for the high-voltage storage tower TSYS-HS51 by SolaX Power. It is the mandatory component that coordinates and supervises the entire tower — managing safety, cell monitoring, communication with the inverter, and optimization of charge/discharge cycles. The base is included in the supply, ensuring stable floor installation.
TSYS-HS51 System — modular architecture from 10.2 to 66.5 kWh
The TBMS-S51-8 is the central controller of the TSYS-HS51 ecosystem, which consists of three elements:
- TBMS-S51-8 (this product) — BMS with base included
- TP-HS51 — LFP battery modules of 5.1 kWh (4.59 kWh usable at 90% DoD)
- Series Box (TCBox-70) — required to connect two towers when exceeding 7 modules per tower
A single tower managed by the TBMS-S51-8 can host 2 to 8 battery modules (from 10.2 to 40.8 kWh). With the addition of the Series Box, it is possible to connect up to 3 towers for a maximum system capacity of 66.5 kWh.
BMS Functions — safety and optimization
The TBMS-S51-8 operates on multiple levels of protection and management:
- Real-time monitoring — voltage, temperature, and state of charge (SOC) of each individual cell, 24/7
- Cell balancing — ensures all modules charge and discharge evenly, extending the system’s lifespan
- Overcharge, short-circuit, and over-temperature protection — automatic shutdown in case of abnormal conditions
- Integrated battery heating — maintains performance even in cold climates, ensuring operation at low temperatures
- Remote diagnostics and firmware updates — accessible remotely via the SolaX platform
Max current 70A — for high-power systems
The TBMS-S51-8 supports a maximum charge and discharge current of 70A, making it suitable for systems with high instantaneous power demands — both for fast charging from the photovoltaic system and for supplying power during household consumption peaks or in backup mode.
Inverter compatibility and off-grid functionality
Communication takes place via CAN and RS485 interfaces, compatible with all SolaX hybrid inverters of the X1-Hybrid and X3-Hybrid series. When used with a compatible SolaX hybrid inverter, the TSYS-HS51 system offers full off-grid functionality — automatically and uninterruptedly powering household loads in the event of a blackout.
Full technical specifications
- Model: TBMS-S51-8
- Manufacturer: SolaX Power
- Function: Battery Management System (BMS)
- Compatible system: TSYS-HS51 (TP-HS51 modules of 5.1 kWh)
- Battery modules per tower: 2 to 8
- System capacity (1 tower): 10.2 – 40.8 kWh
- Max system capacity (with Series Box): up to 66.5 kWh
- Max charge/discharge current: 70 A
- Communication: CAN + RS485
- Protection rating: IP66
- Base: included
- Off-grid functionality: yes (with compatible SolaX hybrid inverter)
- Battery heating: integrated
- Dimensions (W×H×D): 600 × 225 × 376 mm
- Weight: 18.5 kg
