Dyness STACK100 S51100 5.12kWh High Voltage Battery Module
The S51100 is a 5.12kWh LiFePO4 battery module for the Dyness STACK100 high-voltage system. This listing is for the battery module only. A complete stack requires 3–15 modules, one compatible BDU and one base.
Key Features
- Modular high-voltage storage: 3–15 modules are connected in series per stack, providing 15.36–76.8kWh nominal capacity.
- Scalable system: Up to 12 complete stacks in parallel, providing a maximum of 921.6kWh nominal energy.
- Battery module: Each S51100 module provides 5.12kWh nominal energy and 4.864kWh usable at 95% DOD.
- System protection: STACK100 combines battery management, aerosol fire protection and forced-air cooling.
- System monitoring: WiFi app monitoring and OTA updates through the system’s control equipment.
- Cycle life: At least 8,000 cycles under the manufacturer’s stated test conditions.
Where to Use
Indoor residential or commercial energy storage with a compatible high-voltage inverter. The approved inverter voltage window determines the permitted number of modules in each stack.
Technical Specifications
| Battery module model | S51100 |
| Battery type | LiFePO4 |
| Nominal energy per module | 5.12kWh |
| Nominal capacity per module | 100Ah |
| Usable energy per module at 95% DOD | 4.864kWh |
| Nominal voltage per module | 51.2V |
| Modules per complete stack | 3–15 modules connected in series |
| Nominal energy per complete stack | 15.36–76.8kWh |
| System operating voltage | 134.4–864V across the 3–15-module configurations; select a configuration within the inverter’s approved voltage window |
| BDU and base requirement | One compatible BDU and one base per stack; required separately |
| Maximum parallel stacks | 12 |
| Maximum system nominal energy | 921.6kWh (12 stacks × 15 modules × 5.12kWh) |
| Recommended charge/discharge current | 50A (0.5C) |
| Maximum continuous charge/discharge current | 100A (1C) |
| Peak charge/discharge current | 125A for 2 minutes at 25°C |
| Recommended depth of discharge | 95% |
| System communication | CAN / RS485 |
| Cycle life | ≥8,000 cycles (0.2C charge/discharge, 25°C, 95% DOD, 70% end-of-life capacity) |
| Ingress protection | IP20; indoor installation |
| Module dimensions (W × D × H) | 590 × 390 × 133.5mm, as specified in the user manual |
| Net module weight | 47kg |
| Charging temperature | 0°C to 55°C; -20°C to 55°C only for a unit equipped with the heating function |
| Discharging temperature | -20°C to 55°C |
| System cooling | Forced-air cooling |
| System fire protection | Aerosol fire extinguisher |
| Certification / system standards | CE-EMC, CE-RED, IEC 62619, IEC 63056, IEC 62477, IEC 62040, UN38.3 |
| Manufacturer warranty | 10-year limited manufacturer warranty, subject to the applicable warranty terms |
Additional Details
- Trade only: MCS or NICEIC membership required. Homeowners can enquire about installation through our partners.
- What this listing supplies: One S51100 battery module. A module cannot operate as a complete standalone battery. The BDU, base and the remaining modules required for a complete stack are separate system components.
- System design: Module count, inverter compatibility, cables and protection must be selected for the complete high-voltage system. All parallel stacks must follow the manufacturer’s configuration requirements.
- Capacity expansion: Follow Dyness’s expansion procedure, including compatible hardware, firmware and battery state of charge. Confirm the approved configuration before adding modules.
- For inverter compatibility, battery sizing or installation advice, call 020 8064 0335 or email info@energian.co.uk.
Delivery is normally available within 2–3 working days across the UK. Longer delivery times may apply to the Scottish Highlands, islands and Northern Ireland.
Documents available for download: