Sungrow PowerStack ST255CS-2H-US 257Kwh

Description

Sungrow PowerStack ST255CS-2H-US is a fully integrated 125 kW / 257 kWh liquid-cooled Battery Energy Storage System (BESS) engineered for commercial and industrial (C&I) applications. It combines battery modules, PCS, EMS, liquid cooling, fire protection, and intelligent monitoring in a single outdoor-rated cabinet, providing high efficiency, rapid deployment, and reliable energy management.

Technical Specifications :

Specification	Value
Model	Sungrow PowerStack ST255CS-2H-US
Rated AC Output Power	125 kW
Battery Capacity	257 kWh
Battery Chemistry	Lithium Iron Phosphate (LiFePO₄)
Battery Configuration	256S1P
Battery Voltage Range	691.2–934.4 VDC
Rated AC Voltage	480 V (US version)
Grid Frequency	60 Hz
PCS Efficiency	>98.5%
System Round-Trip Efficiency	>90%
Cooling	Intelligent Liquid Cooling
Protection Rating	IP55
Operating Temperature	-30°C to +50°C
Communication	Ethernet, Modbus TCP
Installation	Outdoor Cabinet

Features

• 125 kW AC output with 257 kWh battery capacity
• Integrated PCS, battery, EMS, BMS, and liquid cooling
• Intelligent AI-assisted thermal balancing reduces auxiliary energy consumption
• PCS efficiency exceeding 98.5%
• System round-trip efficiency above 90%
• Grid-forming capability for enhanced grid support
• Black-start capability for off-grid applications
• One-click commissioning for rapid deployment
• Supports parallel installation of multiple cabinets
• Remote monitoring through iSolarCloud platform

Safety Features

• Multi-level Battery Management System (BMS)
• AI-powered cell monitoring
• Three-level fire protection architecture
• Smoke, heat, and combustible gas detection
• Integrated fire suppression system
• Overcurrent, overvoltage, and insulation protection
• Emergency shutdown function
• Liquid cooling for uniform cell temperature

Applications

• Commercial & Industrial facilities
• Manufacturing plants
• Warehouses
• Office buildings
• Shopping centers
• Solar PV + Battery Storage
• EV charging stations
• Peak shaving
• Demand charge management
• Backup power
• Microgrids
• Renewable energy integration

Advantages

• All-in-one factory-integrated ESS
• Compact footprint for easy installation
• High energy density
• Fast commissioning (approximately 2 minutes for software setup)
• Low maintenance requirements
• Excellent thermal management
• Reliable operation in demanding environments
• Flexible expansion with multiple cabinets operating in parallel

Warranty

Typical commercial deployments include:

• Standard Warranty: 5 years
• Extended Warranty: Up to 10 years (optional, depending on project agreement)
• Remote monitoring support via iSolarCloud
• Optional preventive maintenance and service contracts

The Sungrow PowerStack ST255CS-2H-US is ideal for businesses seeking a compact, high-performance battery storage solution to maximize solar self-consumption, reduce electricity costs, improve power reliability, support EV charging infrastructure, and enable resilient grid-connected or off-grid commercial energy systems.

Review :

PowerStack 255cs – Liquid-Cooled C&I ESS User Manual Datasheet