The Sungrow PowerStack ST255 Liquid Cooled C&I Energy Storage System is a next-generation commercial and industrial battery solution engineered for high-performance, safety, and operational flexibility.

With a nominal capacity of 257 kWh and rated power of 125 kW, the system is designed for demanding C&I applications including factories, logistics centers, commercial buildings, and energy communities across the EU market.

Its highly integrated, pre-installed design significantly reduces on-site commissioning time. The intelligent liquid cooling system maintains cell temperature difference within ≤ 2.5℃, improving system stability and extending battery lifetime.

Key Advantages of PowerStack ST255

Lower Cost

• Pre-installation and factory pre-commissioning reduce installation time and labor costs
• AI-controlled thermal balance reduces daily system heat loss by up to 33%
• Wireless intelligent O&M with one-click remote upgrades lowers maintenance costs

Efficient & Flexible

• Up to 98.5% DC/AC conversion efficiency
• Supports on-grid, off-grid, and automatic switching modes
• Parallel connection up to 25 units (on-grid)
• Seamless side-by-side cabinet installation

Safe & Reliable

• AI-monitored cell health with early thermal runaway warnings
• Three-level over-current protection (PACK, RACK, PCS)
• Three-level fire-prevention design
• Built-in combustible gas, smoke, and heat detectors

Smart & Robust

• Real-time monitoring via iSolarCloud app or web portal
• Modbus TCP and Ethernet communication
• IP55 protection rating
• Operating temperature range: -30℃ to +50℃
• Operating altitude up to 3000 m
• Noise level ≤ 65 dB @1 m

The ST255CS-2H delivers a reliable, intelligent, and cost-optimized energy storage solution for modern commercial and industrial energy infrastructure