Sungrow PowerStack is one of the most advanced BESS (Battery Energy Storage System) solutions for the C&I (Commercial & Industrial) segment. As one of the world’s leading manufacturers of inverters and batteries for solar PV systems, Sungrow integrates advanced technologies into its PowerStack solutions to maximise efficiency and reliability.
The Sungrow PowerStack range includes the ST255CS-2H and ST510CS-4H models, offering storage capacities of 257 kWh and 514 kWh respectively. These are all-in-one, liquid-cooled energy storage systems supplied with factory pre-commissioning as standard.
Technical features of Sungrow PowerStack
Sungrow PowerStack enables battery charging and discharging at a 0.5C or 0.25C C-rate via the integrated 125 kW SC125CX PCS, with DC/AC conversion efficiency of up to 98.5%.
Thanks to the Modbus TCP protocol via Ethernet interface, Sungrow PowerStack can be integrated with third-party EMS platforms and supports customised operating strategies, providing a high level of flexibility for different energy applications.
The Sungrow PowerStack system is housed in an IP55-rated cabinet, with C4 anti-corrosion certification as standard and C5 available as an option, and operates within a temperature range of -30°C to 50°C.
All units are supplied with factory pre-commissioning, significantly reducing installation time and on-site costs.
Sungrow PowerStack liquid cooling system
Sungrow PowerStack features an innovative AI-controlled liquid cooling system, which reduces daily system heat losses by up to 33%.
This technology ensures uniform heat dissipation and maintains the temperature difference between cells below 2.5°C, helping to improve both the performance and service life of the Sungrow PowerStack energy storage system.
Thanks to its compact design, PowerStack units can be installed side by side with no clearance between cabinets, optimising the use of the available installation area.
For the ST255CS-2H, up to 25 Sungrow PowerStack units can be connected in parallel in on-grid mode and up to 10 units in off-grid mode. For the ST510CS-4H, up to 20 units can be connected in parallel.
Sungrow PowerStack fire protection system
Sungrow PowerStack integrates a three-level fire protection system designed to maximise operational safety, including:
- flammable gas detector
- smoke detector
- heat detector with activation of aerosol or nozzle-based fire suppression systems
- audible alarm and remote alarm integrated into the monitoring system
Sungrow PowerStack: AI and smart monitoring
Sungrow PowerStack integrates advanced artificial intelligence technologies for continuous cell health monitoring, enabling early detection of thermal runaway and providing three-level overcurrent protection at PACK, RACK and PCS level.
PowerStack is equipped with the iSolarCloud monitoring platform, accessible via web browser or app. It provides comprehensive system data and real-time alarms, supporting efficient fault detection and system management.
Sungrow PowerStack software can also be updated remotely via a wireless near/far-end system, helping to reduce O&M (Operation & Maintenance) and labour costs.
Sungrow PowerStack – ST225kWh-110kW-2h/ST455kWh-110kW-4h
The Sungrow PowerStack is an advanced energy storage system designed for commercial and industrial applications, available in two configurations:
- ST225kWh-110kW-2h: nominal capacity of 229 kWh and nominal power of 110 kW
- ST455kWh-110kW-4h: nominal capacity of 458 kWh and nominal power of 110 kW
Advanced thermal management
The PowerStack uses an advanced liquid cooling system that ensures uniform heat dissipation with a temperature difference between cells ≤ 2.5°C, improving efficiency and durability. Thanks to an AI algorithm that controls thermal balance, the system reduces heat losses by 33% throughout the day.
Suitable for outdoor installations
Powerstack operates in a wide temperature range from -30°C to 50°C and is protected by an IP55 rated enclosure, making it suitable for outdoor installations.
Advanced safety
Intelligent cell health monitoring with immediate alarms to manage any thermal runways. Three-level overcurrent protection (PACK, RACK, PCS) and three-level fire protection design with precise alarms to prevent fires.
Flexibility and scalability
Ability to connect in parallel “side by side” to adapt to the specific needs of each site.
Intelligent management
Real-time monitoring via the iSolarCloud app or web platform, with alarm and troubleshooting capabilities. Wireless operation and remote updates help reduce operation and maintenance costs.
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