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Sungrow Power Stack Commercial Storage
Sungrow Power Stack – The next generation of liquid-cooled commercial and industrial storage systems
Maximum efficiency. Versatile scalability up to the MWh range.
Product overview
The Sungrow Power Stack is a liquid-cooled commercial energy storage system (C&I) that combines inverters, battery storage, EMS and safety mechanisms in a compact all-in-one system.
Depending on the model, 225–257 kWh of storage capacity and 110–125 kW of power are available.
Available models
- PowerStack ST225kWh‑110kW‑2h (225–229 kWh, 110 kW)
- PowerStack 255CS / ST255CS‑2H (ca. 257 kWh, 125 kW)
Capacity & Performance
- Usable capacity: 225–229 kWh (depending on variant), with 257 kWh in the 255CS model
- Power: 110 kW (ST225), 125 kW (ST255CS)
Technical characteristics
- Battery: Lithium iron phosphate (LFP)
- 3-phase, 400 V AC
- PCS efficiency over 98.5% (255CS)
- Round-trip efficiency over 90%, thanks to intelligent liquid cooling (255CS)
- Voltage: 691.2–934.4 V
- Temperature range: –30°C to 50°C (derating from 45°C)
- Protection class: IP55
Safety and protection features
3-stage fire protection system
- Detection: smoke, heat, gas
- Aerosol or liquid-based fire extinguishing
- Multi-stage overcurrent protection (pack, rack, PCS)
AI-supported battery cell monitoring
Early warning in case of thermal runaway Predictive management of cell health
Thermal management
- Advanced liquid cooling
- Temperature difference between cells ≤ 2.2 °C
- Up to 33% less heat loss
Installation and operating advantages
Pre-assembled complete system
Pre-installation and pre-commissioning Minimises installation time on site.
Quick commissioning
- 1-click setup (255CS)
- 1–25 units configurable in just 2 minutes
Flexible installation
- Side-by-side, back-to-back, face-to-face
- Suitable for outdoor use (IP55)
Monitoring & control
- Full integration into the iSolarCloud
- Real-time monitoring, remote diagnosis, remote updates
Scalability & system integration
- Up to 25 units in parallel (2h system) → max. 5.7 MWh
- Compatible with Sungrow PV inverters & third-party EMS
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