Dunext PowerHill 261kWh All-in-One Liquid-Cooled C&I Battery Storage System
Dunext PowerHill 261kWh battery + 125 kW AC Inverter + 5-year warranty
The Dunext PowerHill-P125-261kWh-S2 is an all-in-one, liquid-cooled C&I battery storage system combining 261kWh rated capacity with 125kW charging and discharging power in one IP55 outdoor cabinet.
It integrates five 314Ah LFP battery packs, BMS, bidirectional PCS, local EMS, liquid cooling, fire suppression, auxiliary power and communications for streamlined installation and commissioning.
Up to 10 cabinets can be connected in parallel, scaling the system to approximately 1.25MW/2.61MWh for larger commercial installations.
  Intelligent Liquid Cooling
Automatic coolant replenishment reduces maintenance, with no routine coolant replacement required for up to 10 years, subject to Dunext’s operating and maintenance conditions.
 Safe & Reliable
- Six-side cell insulation
- Pack-level fault isolation
- Contactor, DC breaker and fuse protection
- PCS-level grid-fault protection
- Smoke and temperature detection
- Aerosol fire suppression
- External fire-alarm connection
- Internal fault containment
 DuLink Intelligent Monitoring
Ethernet, MQTT and Modbus TCP support integration with compatible PV inverters, meters and external energy-management systems.
  Scalable Parallel Expansion
 PV + ESS Ready
  Fast Backup Switching
Provides up to 125kW three-phase backup output.
With compatible Dunext PCC and transfer-switching equipment, the system can switch from on-grid to off-grid operation in less than 20ms, helping maintain critical-load continuity during grid interruptions.
 Liquid-Cooling BESS
Maintains cell temperature difference below 2.5°C, with automatic coolant replenishment and up to 10 years without routine replacement.
 Safe & Reliable
Multi-layer electrical, battery and fire protection with fault isolation, smoke detection and aerosol suppression.
 DuLink Intelligent Monitoring
Real-time system control, cell-level monitoring, alerts and remote maintenance via local EMS and DuLink.
  Scalable Expansion
Up to 10 cabinets can operate in parallel, scaling the system to approximately 1.25MW / 2.61MWh.
 PV + ESS Ready
Supports compatible PV integration, self-consumption, zero-export control, demand management and scheduled charging.
 Fast Backup Switching
Provides up to 125kW backup output with on-grid to off-grid switching in less than 20ms using compatible Dunext equipment.
Cabinet
- Product type: Integrated outdoor C&I battery energy storage cabinet
- Rated capacity and power: 261kWh / 125kW
- Rated grid voltage: 220/380V or 230/400V
- Storage duration: Approximately 2 hours
- Intelligent liquid cooling with <2.5°C cell temperature difference
- Coolant maintenance: Up to 10 years without routine replacement
- Protection rating: IP55
- Anti-corrosion grade: C4 (C5 available as an optional upgrade)
- Derating: Above 45°C or 2,000m altitude
- Communications: Ethernet, MQTT and Modbus TCP
- Dimensions: 1026 Ă— 2366 Ă— 1350mm
- Weight: Approximately 2,800kg
- Parallel expansion: Up to 10 units, approximately 1.25MW/2.61MWh
- Warranty: Standard 5 years
Battery (DC)
- Cell type: LiFePOâ‚„, 314Ah
- Rated battery capacity: 261kWh
- Battery configuration: 5 packs, 1P52S each
- Charge/discharge rate: 0.5C
- System round-trip efficiency: ≥90%
- Cycle life: 8,000 cycles at 70% EOL
- Battery management: Integrated BMS
- Thermal management: Liquid coolingÂ
- Six-side cell insulation
- Smoke and temperature detection with aerosol fire suppression
PCS (AC)
- Integrated bidirectional PCS
- Rated charge/discharge power: 125kW
- AC connection: 3P4W
- Rated AC output current: 181A
- Â Maximum backup output current: 200A
PV and System Integration
- AC-coupled integration with new or existing PV systems
- Compatible third-party inverter communication
- PV and load monitoring via dual meters
- Solar self-consumption and zero-export control
- Peak-demand and time-of-use management
- Backup operation with compatible external equipment
| High / Low Voltage Battery | High Voltage |
| Battery / System Model | Dunext PowerHill (C&I) |
| Brand | Dunext |
| Protection Rating (IP) | Suitable for Outdoors |
| Battery End User | Commercial/Industrial |
| Battery Cell Type | LiFePO4 (LFP) |
| Battery Nominal Capacity (kWh) | 261.0 |
| Charge/Discharge Rate | 0.5C |
| Grid Connection | Grid and Off Grid Capable |
| Battery IP Rating | IP55 |
| Dimensions (W x H x D) mm | 1026 Ă— 2366 Ă— 1350 |
| Product Weight (Kg) | 2800 |