Sungrow PowerStack C&I BESS Solar Storage

Description

Sungrow PowerStack is an all-in-one AC-coupled Battery Energy Storage System (BESS) for commercial and industrial applications,  integrates the battery, PCS (bidirectional inverter), BMS, EMS, HVAC, and fire protection into a single outdoor cabinet. This reduces engineering effort and installation time. For a 100–125 kW commercial solar + storage project, the Sungrow PowerStack is often the simpler solution.

Capacity :

Model	Battery Capacity	PCS Power	Typical Duration
ST225kWh-110kW-2h	229 kWh	110 kW	~2 hours
ST255CS-2H-US	257 kWh	125 kW	~2 hours (US version)

Specifications  :

ST225kWh-110kW-2h  229 KWh

Item	Specification
Battery Chemistry	LFP (Lithium Iron Phosphate)
Cell	3.2 V / 280 Ah
Battery Capacity	229 kWh
PCS	110 kW bidirectional
AC Voltage	400 V, 3-phase
Battery Voltage	691–934 VDC
Round-trip Efficiency	Up to ~90% (system)
Cooling	Intelligent liquid cooling
Protection	IP55
Corrosion Rating	C5 (standard)
Dimensions	1150 × 1610 × 2450 mm
Weight	~3,100 kg
Communication	Ethernet, Modbus TCP
Operating Temperature	-30°C to +50°C (>45°C with derating)
Maximum Altitude	3,000 m

ST255CS-2H-US 257 KWh

Parameter	Specification
Model	Sungrow PowerStack ST255CS-2H-US
Application	Commercial & Industrial ESS
Battery Capacity	257 kWh
Rated AC Output Power	125 kW
Battery Chemistry	Lithium Iron Phosphate (LFP)
Cell Type	3.2 V / 314 Ah
Battery Configuration	256S1P
Battery Voltage Range	691.2–934.4 VDC
Battery Operating Window	0–100% DoD
Cooling	Intelligent Liquid Cooling
Rated AC Voltage	480 Vac, 3-Phase, 4-Wire (US version)
AC Voltage Range	408–528 Vac
Frequency	60 Hz
PCS Efficiency	Up to 98.6%
System Round-Trip Efficiency	>90%
Maximum Parallel Systems	Up to 25 (grid-connected)
Protection Rating	IP55
Corrosion Protection	C5
Operating Temperature	-30°C to +50°C (>45°C derating)
Maximum Altitude	3,000 m
Noise	≤65 dB @ 1 m
Communication	Ethernet, Modbus TCP
Monitoring	Sungrow iSolarCloud

Parameter	Value
Dimensions (W × H × D)	1150 × 2450 × 1610 mm
Weight	≤3,200 kg
Installation	Outdoor
Enclosure	Factory-integrated cabinet

Features

1. All-in-One Design

Integrated into one cabinet :

• Battery
• PCS
• BMS
• EMS interface
• Liquid cooling
• Fire detection
• Fire suppression

This reduces field wiring and commissioning compared with separate-component systems.

2. Intelligent Liquid Cooling

Benefits include:

• Uniform cell temperatures
• Longer battery life
• Better efficiency
• Lower maintenance

3. Grid-Forming Capability

The latest PowerStack 255CS supports grid-forming technology, enabling:

• Stable operation on weak grids
• Off-grid (islanded) operation
• Black-start capability
• Microgrid applications

4. Safety

The PowerStack includes:

• Smoke detection
• Heat detection
• Flammable gas detection
• Aerosol fire suppression
• Sprinkler system
• Multi-level BMS protection

5. Life Cycle Design : 20 years

 

Applications

Typical applications include:

• Solar PV + Battery Storage
• Peak shaving
• Demand charge management
• Time-of-use (TOU) arbitrage
• Backup power
• EV fast charging
• Manufacturing plants
• Commercial buildings
• Hotels
• Hospitals
• Data centers
• Microgrids

 

ST225kWh-110kW-2h – ST255CS-2H-US  For Solar Storage Warranty :

Typical commercial warranty offerings are :

• 10-year product warranty (varies by region and distributor)
• Optional extension to 15–20 years
• Performance warranty based on retained battery capacity

Always confirm the warranty with the local Sungrow distributor, as terms vary by country and project.

Here is for Sungrow PowerStack DATASHEET 

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