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 – 255/510CS – 125 kW – 257/514 kWh Energy Storage System
All-in-one liquid-cooled battery energy storage system (BESS) Sungrow PowerStack ST255CS and PowerStack ST510CS-4H, built for C&I scenarios requiring high efficiency and rapid installation.
- Rated power 125 kW
- Storage capacity 257 or 514 kWh
- DC/AC conversion efficiency up to 98.5%
- AC output 400 V
- Liquid cooling with AI-driven thermal control
Datasheet English
Complete documentation
The Sungrow PowerStack ST CS is an all-in-one liquid-cooled battery energy storage system (BESS) designed for medium-to-large C&I applications, that can be configurated both in the 2 hours autonomy version and in the 4 hours version.
The system uses LFP cells rated at 3.2 V/314 Ah, for a nominal capacity of 257 or 514 kWh and a depth of discharge from 0 to 100%. The rated AC output power is 125 kW at 400 V, with a grid voltage range of 340-440 V. The DC/AC power conversion unit achieves an efficiency of up to 98.5%.
The liquid cooling system, managed by an AI algorithm, keeps the cell temperature difference below 2.5°C and cuts daily system heat loss by 33%. The product is pre-assembled and pre-commissioned at the factory, reducing on-site commissioning time.
Safety is ensured by AI-based cell health monitoring with early warning for thermal runaway risk, three-level overcurrent protection (PACK, RACK, PCS), and a fire suppression system with combustible gas, smoke, and heat detectors. The cabinet has an IP55 protection rating and C4 anti-corrosion class as standard (C5 optional), with an operating temperature range from -30°C to 50°C.
Last but not least, the storage is equipped by default with a UPS system for auxiliary power supply. Optional is instead the version without an internal UPS and arranged to connect to an external UPS.
The system supports on-grid, off-grid and automatic switching operation, with grid-forming technology and black start capability. Communication is via Ethernet with Modbus TCP protocol for integration with EMS300CP or with third-party EMS, while remote monitoring is handled through the iSolarCloud platform.
The product is certified to IEC 62619, IEC 63056, IEC 62040, IEC 62477, IEC 61000, and IEC 62933, and can be connected in parallel up to 25 units on-grid or 10 units off-grid.
Related products
-
Storage Battery, ZCS Azzurro
ZCS Azzurro: US5000 battery – low voltage – from 4,3 to 21,5 kWh
The US5000 batteries are a modular storage solution that can be used with ZCS single-phase inverters.
- LFP technology
- Total net capacity (single module): 4,3 kWh
- Nominal voltage (single module): 48 V
- Maximum charge and discharge current: 80 A
- 10-year warranty
SKU: n/a -
Storage Battery, Pylontech
Pylontech US3000 – lithium technology – low voltage
Pylontech US3000 lithium batteries, 3.55 kWh modules, maximum instantaneous charge and discharge power and depth of discharge up to 95%.
- 10 year warranty
- Longer life cycle, exceeding 6000 cycles
- Internal molecular structure of LFP batteries
- Compact and modular design
- Soft-start mode : reduces the peak current when the inverter must start with only one battery
SKU: n/a -
Storage Battery, ZCS Azzurro
ZCS Azzurro: HV ZBT 5K – high voltage – from 5.12 kWh to 20.48 kWh
The high voltage batteries of the HV ZBT 5K series constitute a stackable system compatible with the ZCS three-phase hybrid inverters and the EasyPower all-in-one single-phase system.
- LFP batteries
- Nominal capacity (single module): 5,12 kWh
- Stackable system (up to 4 modules in parallel)
- Nominal voltage: 400 V
- Weight (single module): 50kg
- Warranty: 10 years
SKU: n/a -
Storage Battery, BESS, Huawei
Huawei LUNA2000 107-215 – C&I BESS storage system with hybrid cooling
The Huawei LUNA2000-(107-215) system is the ideal solution for commercial and industrial installations that require high-capacity energy storage, scalability and maximum safety.
- Available storage capacities: 215 kWh, 161 kWh, 107 kWh
- Charging/discharging power: up to 108 kW
- LFP cells
- Maximum cycle efficiency: 3 % (@ 0.25 C)
- Protection rating: IP55
SKU: n/a
