TB-HS51
The SolaX TB-HS51 is the high-voltage battery module with 5.1 kWh capacity from the TSYS-HS51 system, designed for solar energy storage in homes and small businesses. Based on LiFePO₄ (lithium iron phosphate) cells, it ensures high safety, long lifespan, and zero maintenance. Modular and stackable, it can be expanded up to 66.5 kWh without changing the inverter.
- 🔋 Nominal capacity: 5.1 kWh | Usable capacity: ~4.6 kWh
- ⚡ Compatible with Solax X1-Hybrid G4 and X3-Hybrid G4 inverters
- 🛡️ IP66 protection – also suitable for harsh environments
- 🔄 6,000+ cycles – 10-year design life (warranty included)
- 🌡️ Integrated heating: operates from -30°C to +53°C
SolaX TB-HS51 – The HV Battery Module That Grows With Your System
The SolaX TB-HS51 is the heart of the high-voltage storage system TSYS-HS51 by SolaX Power. By purchasing this 5.1 kWh module, you can start with a modest initial capacity and expand your storage up to 66.5 kWh simply by adding more modules—without replacing the inverter or rewiring the system. An investment that grows with your needs.
LiFePO₄ Technology: Superior Safety and Durability
Unlike NMC lithium-ion batteries, LiFePO₄ (lithium iron phosphate) chemistry is inherently stable: it does not generate uncontrolled thermal reactions, does not catch fire, and degrades much more slowly. The result is a battery that:
- Exceeds 6,000 charge/discharge cycles with minimal capacity loss
- Maintains performance over time thanks to the integrated smart BMS
- Is IEC 62619 certified and compliant with European safety standards
- Requires zero maintenance throughout its service life
Scalability: From 5.1 kWh to 66.5 kWh Without Limits
The TSYS-HS51 system is designed for flexible growth:
- With X1-Hybrid G4 inverter (single-phase): from 2 to 8 modules → 10.2 – 40.9 kWh
- With X3-Hybrid G4 inverter (three-phase): from 3 to 13 modules → 15.3 – 66.5 kWh
- Up to 3 towers can be connected in parallel via optional two-in-one cable
- New modules can be added after installation: plug & play, no energy loss
The TB-HS51 sold individually is the standalone battery module (without BMS). For a complete ready-to-use system, at least 2 modules + BMS (TBMS-S51) are required.
Weather and Low Temperature Resistance
The TB-HS51 is IP66 certified: fully protected against dust and water splashes. It can be installed in technical rooms, garages, basements, or semi-open environments. The exclusive internal battery heating technology ensures regular operation even at outside temperatures of -30°C—ideal for installations in mountain areas or cold climates—up to a maximum of +53°C.
Emergency Backup: Light and Power Even During Blackouts
When paired with a compatible Solax hybrid inverter, the TSYS-HS51 system automatically switches to backup mode in case of a power outage. In just a few milliseconds, critical loads (lights, refrigerator, router, pumps) remain powered by the stored energy. It is recommended to maintain at least 25% state of charge (SoC) to ensure backup availability at all times.
Remote Monitoring and Smart Management
The TSYS-HS51 system natively integrates with the SolaX Cloud platform, accessible via app or browser. Remotely you can:
- Monitor in real time the state of charge, input and output power
- Perform OTA firmware updates
- Receive preventive fault diagnostics
- Optimize charging strategies (time slots, self-consumption priority)
Main Technical Specifications
| Parameter | Value |
|---|---|
| Nominal capacity | 5.1 kWh |
| Cell type | LiFePO₄ (lithium iron phosphate) |
| Max charge/discharge current | 70 A |
| Protection | IP66 |
| Operating temperature | -30°C ÷ +53°C |
| Life cycles | > 6,000 |
| Warranty | 10 years |
| Certifications | IEC 62619 |
| Design | Modular, stackable |
| Expandable systems (X1-G4) | 10.2 – 40.9 kWh (2÷8 modules) |
| Expandable systems (X3-G4) | 15.3 – 66.5 kWh (3÷13 modules) |
Note: The TB-HS51 is the battery module only. For a functioning system, it must be paired with the SolaX TBMS-S51 BMS and a compatible hybrid inverter.
Verified Inverter Compatibility
- SolaX X1-Hybrid G4 (single-phase)
- SolaX X1-FIT G4
- SolaX X3-Hybrid G4 (three-phase)
- SolaX X3-FIT G4
- SolaX TCBox-70 (for multi-tower configurations)
