Battery BP-ES-125kW-261kWh-B02 125 kW, 261 kWh, 314 Ah LFP, IP55

The JA Solar BP-ES-125kW-261kWh-B02 is a highly efficient industrial energy storage system (C&I ESS) designed for large commercial and industrial applications. With a power of 125 kW and a capacity of 261 kWh, the system offers reliable energy management, high efficiency and maximum safety.

The battery uses LiFePO4 (LFP) technology, which guarantees a long service life and high safety. Thanks to the integrated liquid cooling system, the temperature of the batteries is maintained optimally (~35°C), which increases efficiency and extends the life of the system.

The model has an advanced protection system (TripleGuard), including multi-level fire protection, explosion protection and real-time monitoring, including thermal runaway warning.

The system is designed for scalability and can be connected in parallel with up to 20 units, allowing the construction of large energy solutions.

Main advantages

Capacity 261 kWh and power 125 kW
LiFePO4 (LFP) technology – high safety
Liquid cooling for optimal performance
High efficiency (RTE up to ~88%)
TripleGuard protection (fire, explosion, monitoring)
Thermal runaway warning
Scalability up to 20 systems
Suitable for industrial and C&I applications

Additional features

Degree of protection: IP55
Anti-corrosion protection: C4M
Communication: MODBUS TCP/IP, MODBUS RTU
Maximum number of parallel systems: 20
Life: ≥8000 cycles
Certification: IEC / UL / UN38.3

• Millisecond-level response with real-time isolation monitoring
• TripleGuard Safety: Fire protection (3-level), explosion-proof construction, PACK detection
• Real-time thermal overload warning

Cost effectiveness

• Higher return on investment with long-lasting LFP batteries and high-precision SOX control
• RTE system efficiency up to 88%
• Liquid cooling keeps batteries at ≤ 35 °C, reduces temperature fluctuations to ≤ 3 °C and reduces auxiliary power consumption by 10%

Reliability

• Predictive maintenance based on artificial intelligence reduces downtime by up to 90%
• Remote troubleshooting fixes 90% of problems through software updates
• The modular design allows quick replacement of components and increases service efficiency
  

  Application

  Industrial and Commercial (C&I) Systems
  Energy Storage (ESS)
  Peak shaving and load management
  Backup power supply
  Microgrid and energy independence

We inform you that, despite our efforts, we cannot guarantee that the published information and photos do not contain inaccuracies or errors that cannot be a legal basis for claims.

Technical characteristics

✅ Capacity: 261 kWh
✅ Power: 125 kW
✅ Battery type: LFP (LiFePO4)
✅ Cell capacity: 314 Ah

✅ Nominal voltage: 832 V DC
✅ Operating range: 728 – 936 V DC
✅ Nominal charge/discharge: 0.5 P
✅ Depth of Discharge (DoD): 95%

✅ Voltage: 380 / 400 V (±15%)
✅ Frequency: 50 / 60 Hz
✅ Power factor: 1.0 (leading to lagging)

✅ Dimensions: 989 × 1465 × 2473 mm
✅ Weight: ~2700 kg
✅ Operating temperature: -30°C to +50°C
✅ Humidity: 0 - 95% RH
✅ Cooling: Liquid (Liquid Cooling)

Additional information