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Sungrow PowerStack ST245CS-S-2H – BESS 249 kWh


Sungrow PowerStack ST245CS-S-2H is a 249 kWh DC-coupled battery energy storage cabinet designed for Commercial & Industrial (C&I) applications. Combined with the Sungrow SH125CX hybrid inverter, it enables modular energy storage solutions for self-consumption, peak shaving and intelligent energy management.

  • 249 kWh nominal battery storage capacity
  • Up to 4 battery cabinets per SH125CX inverter, providing a total capacity of 996 kWh
  • Configurable storage duration from 2 to 8 hours
  • Liquid cooling system with intelligent thermal management
  • Remote monitoring and energy management via iSolarCloud

The Sungrow PowerStack ST245CS-S-2H is a 249 kWh battery storage cabinet from the PowerStack DC-Coupled range, developed for integration with commercial and industrial photovoltaic systems.

The solution operates with the external Sungrow SH125CX 125 kW hybrid inverter, enabling coordinated management of solar PV generation and stored energy.

Scalability and Storage Configuration

The system supports up to 4 ST245CS-S-2H battery cabinets connected to a single SH125CX inverter, providing a total storage capacity of 996 kWh.

Its modular architecture allows storage durations from 2 to 8 hours, adapting the system to different energy consumption profiles.

For larger on-grid applications, up to 24 SH125CX hybrid inverters can be connected in parallel, subject to the manufacturer’s supported configurations.

Intelligent Energy Management

The system incorporates advanced Energy Management features to optimise solar self-consumption, manage peak demand and schedule battery charging and discharging cycles.

Four operating modes are available: Self-consumption, Time Plan, Forced Operation and AI Mode, depending on system configuration and compatibility.

Liquid Cooling and Safety

The Sungrow PowerStack ST245CS-S-2H cabinet features an intelligent liquid cooling system, designed to maintain uniform operating temperatures across battery cells and support efficient operation.

Safety features include battery health monitoring, early detection of abnormal operating conditions and multi-level electrical and thermal protection.

Monitoring and Maintenance

The Sungrow iSolarCloud platform enables remote performance monitoring, alarm management and system diagnostics.

Pre-commissioning procedures and remote firmware update capabilities help simplify installation, commissioning and maintenance activities.

Commercial & Industrial Applications

The Sungrow PowerStack ST245CS-S-2H is suitable for industrial photovoltaic installations, manufacturing facilities, commercial buildings and logistics centres.

Integration with the SH125CX hybrid inverter enables energy storage solutions for self-consumption, peak shaving, load management and backup power, where supported by the system configuration.