Sungrow has launched its next-generation liquid-cooling energy storage system for the commercial market: PowerStack 255CS.
Equipped with 314-Ah battery cells, the PowerStack 255CS delivers a 257-kWh capacity (two-hour system) or 514-kWh capacity (four-hour system) for a single container. With Sungrow’s AC Block product design, the system ensures a round-trip efficiency (RTE) of more than 90% and a product design lifetime of up to 20 years.
Besides, incorporating advanced liquid-cooling technology, the AI-controlled heat balance technology analyzes the cell temperature and the operating conditions data, intelligently adjusting the cooling power to reduce auxiliary power consumption by 33% — maximizing both performance and economic benefits.
The PowerStack 255CS has UL9540 and NFPA855/69/68/14 certifications, ensuring the highest standards of protection. It features advanced cell anomaly detection and multi-stage overcurrent protection to prevent thermal runaway. The system integrates early fire detection with multiple suppression measures, minimizing risks at every stage. With a comprehensive safety design incorporating cabinet-level, rack-level, and pack-level fuse protection, the PowerStack 255CS delivers robust fire prevention and enhanced operational security.
With a fully integrated energy management system (EMS), power conversion system (PCS) and battery management system (BMS), PowerStack 255CS streamlines energy storage operations while reducing installation complexity. The system supports multiple layout configurations, offering adaptable deployment for diverse site requirements. Additionally, pre-installed and pre-commissioned components enable rapid grid connection. Up to 25 units can be connected for projects between 257 kWh and 6.4 MWh.
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