BESSOutdoor Cabinet
SIE IONIX · UTILITY & C&I STORAGE
SIE-BESS1200
1.2 MWh
Liquid-cooled C&I cabinet on the same 51.2 kWh pack as the 5 MWh container.
Specifications
| Chemistry | LFP 320 Ah prismatic |
| Configuration | 3 racks × 8 packs (24 packs) · 1P50S pack · rated 51.2 kWh / 160 V |
| Cell topology | 50 cells in series per pack |
| Capacity | 1,228.8 kWh nominal BOL (usable 1,105.9 kWh @ 90% DoD) |
| Usable energy, EOL | 774.1 kWh (70% SoH, 90% DoD) |
| Rack energy | 409.6 kWh (one BMS controller per rack) |
| Pack voltage | 160 V nominal |
| DC bus voltage | 1,280 V (full-power window 1,120–1,446 V · protection limits 1,000–1,460 V) |
| Max continuous DC power | 614.4 kW (0.5C charge / 0.5C discharge) |
| Cycle life | ≥6,000 cycles @ 90% DoD (25°C) to 70% SoH |
| Design life | ≥20 years |
| Round-trip efficiency | ≥94.0% DC @ 0.5C · ≥95.5% DC @ 0.25C · ≥87.0% AC-AC with SilicIndia PCS and EMS |
| Operating DoD | 90–95% |
| SoC at delivery | 30–50% |
| Self-discharge | ≤3% / month @ 25°C |
| Cell uniformity | <3°C cell-to-cell temperature delta |
| Cooling | Active liquid (glycol-water) |
| BMS | Multi-level SI-BMS, one controller per rack, cell-level fusing |
| EMS | BMS–EMS–PCS integration · third-party EMS and PCS supported |
| Fire detection | Smoke + temperature + H₂ gas |
| Fire suppression | Aerosol (pack level) + water-based (cabinet level) |
| Venting | NFPA 68 deflagration venting, two-fault tolerant |
| Thermal runaway | Tested to UL 9540A |
| Emergency shutdown | Local + remote E-stop |
| Noise | ≤68 dBA @ 1 m |
| Enclosure | Outdoor cabinet, non walk-in |
| Anti-corrosion | C4/C5 (ISO 12944-2) |
| Protection | IP54 |
| Operating temp | −30°C to +55°C (derated above +45°C) |
| Storage temp | −40°C to +60°C |
| Humidity / altitude | 0–95% RH non-condensing · ≤3,000 m |
| Seismic / wind | IS 1893 Pt.1:2016 Zone IV · IS 875 Pt.3:2015 |
| Aux consumption | 1.5 / 5 / 6.5 kW (idle / typical at 45°C / maximum at 50°C) |
| BMS comms | CAN 2.0B · RS485 · TCP/IP |
| Protocols | Modbus TCP · IEC 61850 · IEC 60870-5-104 · DNP3 |
| Cybersecurity | IEC 62443 (target) · MFA + encrypted link |
| Fault data | ≥90 days high-resolution retention · GPS/NTP time sync · cloud dashboard, OTA firmware |
| Power factor | ≥0.95, four-quadrant at the connection point |
| Interconnection | 415 V LV or 11 kV · reference PCS 600 kVA, 1,000–1,500 V DC |
| Response time | ≤200 ms to EMS command · ≤20 ms backup transfer with transfer switch |
| System availability | ≥97% annual average, excluding scheduled maintenance |
| Reference duty | 2 h: 500 kW / 1,000 kWh AC · 4 h: 265 kW / 1,060 kWh AC · max power 614 kW |
| Parallel expansion | Up to 8 cabinets on one PCS bus |
| Grid code (AC package) | 47.5–52 Hz operating · droop settable 3–6% · dead band ≤±0.03 Hz · active + passive anti-islanding · THD ≤5% V / ≤8% I per IEEE 519 · IEC 61000-4-30 Class A |
| Installation | Concrete plinth, front access · 300 mm side gap, 3 m clear to occupied structures |
| Weight | 11,200 kg ±3% |
| Dimensions | 2,800 × 1,600 × 2,500 mm (W × D × H) |
| Warranty | 5 years / 6,000 cycles standard; extended guarantee to 70% SoH over 20 years available as a priced option (1 cycle/day, 330 cycles/yr, 25°C). Spare parts 5 years, extendable. |
| Certifications — cell | IEC 62619:2022 · IEC 63056:2020 (target) · UL 1973 (target) · UN 38.3 (target) · UN 3536 (target) |
| Certifications — system | IEC 62933-2-1 / 5-1 / 5-2:2025 (target) · IEC 61000-6-2 / 6-4 (target) · IEC 62443 (target) · UL 9540 (target) · UL 9540A (tested to) · NFPA 855 / 68 / 69 (target) · IS 17092 (target) · IS 17387 (target) |
| Certifications — India | CEA Connectivity 2007 am. 2019 (target) · CEA Metering 2006 am. (target) · ISO 9001 / 14001 / 45001 (target) · RoHS · REACH · cobalt-free |