★ Our flagship configuration.
BESS20-ft ISO High Cube★ FLAGSHIP
SIE IONIX · UTILITY & C&I STORAGE
SIE-BESS5000
5 MWh
Our most deployed product. 5 MWh, liquid-cooled, certified.
Specifications
| Chemistry | LFP 314 Ah prismatic |
| Configuration | 12 racks × 8 packs (96 packs) · 52-cell pack · 4 modules · rated 51.2 kWh |
| Cell topology | 13 cells in series per module |
| Capacity | 4,915.2 kWh nominal BOL (usable 4,423.7 kWh @ 90% DoD) |
| Pack voltage | 160 V nominal |
| DC bus voltage | 1,280 V (full-power window 1,120–1,446 V) |
| Max continuous DC power | 2,458 kW (0.5C) |
| Cycle life | ≥6,000 cycles @ 90% DoD (25°C) |
| Design life | ≥20 years |
| Round-trip efficiency | ≥86% AC-AC · ≥94% DC |
| Operating DoD | 90–95% |
| Self-discharge | <3% / month |
| Cooling | Liquid-cooled (CDU) |
| BMS | Integrated SI-BMS, per-rack |
| EMS | Onboard |
| Fire detection | Smoke + temperature + H₂ gas |
| Fire suppression | Aerosol (main, per-rack) + water (aux) + dry pipe |
| Noise | ≤65 dBA @ 15 m |
| Anti-corrosion | C4/C5 |
| Filtration | MERV-13 |
| Container | 20-ft ISO high cube |
| Protection | IP54 |
| Operating temp | −30°C to +55°C (derated above +45°C) |
| Humidity / altitude | 0–95% RH · ≤3,000 m |
| Seismic / wind | IS 1893 Zone IV · IS 875 Pt.3 |
| Aux consumption | 5 / 18 / 22 kW (idle / 45°C / 50°C) |
| Venting | NFPA 68, two-fault tolerant |
| BMS comms | CAN 2.0B · RS485 · TCP/IP |
| Power factor | 0.95 lagging – leading |
| Interconnection | 33 kV typical via optional 4.0 MVA PCS blocks |
| 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) |
| Weight | 42,000 kg ±3% |
| Dimensions | 6,058 × 2,438 × 2,896 mm |
| Certifications | IEC 62619, IEC 62933, UL 9540A (target) |