
Dyness S51100 Pro High Voltage Storage Battery 5.12kWh LiFePO4 Heated
The Dyness S51100 Pro is the battery module of the STACK100 Pro series, a high voltage storage system with LiFePO₄ cells intended for residential and small commercial PV plants. Each module provides 5.12kWh nominal (4.864kWh usable) at 51.2V and 100Ah, and always works together with the SBDU100 Pro control unit and its base.
The modules stack one on top of the other without cables: from 3 to 15 modules form a cluster of 15.36 to 76.8kWh with an operating voltage of 134.4–864V, and up to 12 clusters can be connected in parallel. The system interfaces over CAN/RS485 with high voltage hybrid inverters — the manufacturer lists Solis, GoodWe, Growatt, Deye and Solinteg — and is monitored via Wi-Fi and app. The heated version offered here extends charging down to −20 °C, useful in unheated technical rooms.
Key features
Technical specifications
| Feature | Value |
|---|---|
| Product code | S51100 Pro |
| Cell chemistry | LiFePO₄ (LFP) |
| Module rated energy | 5.12kWh |
| Usable energy | 4.864kWh |
| Rated capacity | 100Ah |
| Rated voltage | 51.2V |
| Modules per cluster | 3–15 |
| Cluster operating voltage | 134.4–864V |
| System energy | 15.36–76.8kWh per cluster |
| Expansion | Up to 12 clusters in parallel |
| Recommended charge/discharge current | 0.5C (50A) |
| Maximum charge/discharge current | 1C (100A) |
| Peak discharge current (25 °C) | 125A for 2 min |
| Recommended charge/discharge power | 2.56kW |
| Maximum charge/discharge power | 5.12kW |
| Depth of discharge (DOD) | 95 % |
| Charging temperature | 0…+55 °C; −20…+55 °C in the heated version |
| Discharging temperature | −20…+55 °C |
| Protection degree | IP66 |
| Communication | CAN / RS485 |
| User interface | Wi-Fi + app |
| Cycle life | ≥ 8,000 cycles (0.2C, 25 °C, 95 % DOD, 70 % EOL) |
| Cooling | Natural |
| Installation | Cable-free stacking |
| Compatible inverters | Solis, GoodWe, Growatt, Deye, Solinteg and others |
| Standards | CE-EMC, CE-RED, IEC 62619, IEC 63056, IEC 62477, UN38.3 |
| Module dimensions (W × D × H) | 657 × 460 × 169 mm |
| Module weight | 55 kg |
| SBDU100 Pro BDU dimensions (W × D × H) | 657 × 460 × 193 mm |
| SBDU100 Pro BDU weight | 23.5 kg |
| Warranty | 10 years |
Documentation
PDFDatasheetOfficial manufacturer documentInstallation and wiring must be carried out by qualified personnel in accordance with the applicable standards and the electrical design of the system.
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