• SUNGROW PowerStack 255CS 125kW/257kWh; PCS + BAT,
  • SUNGROW PowerStack 255CS 125kW/257kWh; PCS + BAT,
SUNGROW
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SUNGROW PowerStack 255CS 125kW/257kWh; PCS + BAT, Liquid Cooled C&I Energy Storage System

Manufacturer Sungrow
Item No. ST255CS-2H
EAN ST255CS-2H

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Technical details
Corrosion protection C5
Weight 2900 kg
Max. depth of discharge 100 %
AC - nominal output power 125000 W
Cooling method Liquid
Battery cell type LFP
Nominal battery capacity 257 kWh
Ambient temperature -30 .. 50 °C
Width 1150 mm
Height 2450 mm
Depth 1610 mm


Downloads

Datasheets (1)
DS_ST255CS-2H.pdf
Instructions (2)
QIG_ST255CS-2H.pdf USER MANUAL_ST255CS-2H.pdf
Certificates (6)
CR_20241119_SC100_110_125CX_IEC 62443-4-2_CB Certificate.pdf CT_SC125CX&110CX_CE RED_CN2429SM 001_V1_EN_20240223.pdf CT_SC125CX-V241-V242-50-60_CE EMC_AK 50679840 0001_EN_20250530.pdf CT_SC125CX-V241-V242-50-65_EN50549-1_U25-0449_EN_20250509.pdf CT_SC125CX-V241-V242-50-65_EN50549-2_U25-0448_EN_20250509.pdf EN_SC110CX_SC125CX_EU_Declaration_of_Conformity_EN.pdf

Manufacturer information

Sungrow is a global manufacturer of PV inverters and energy storage systems, founded in 1997 in Hefei, China. It ranked No. 1 in global PV inverter shipments for 2025 and has over 1,000 GW of converters installed worldwide.

Product description

The Sungrow ST255CS-2H is a liquid-cooled C&I energy storage system (PowerStack) integrating a 125 kW PCS with a 257 kWh LFP battery (314Ah cells, 256S1P, 691–934V) in one floor-standing cabinet. AC output is 125 kW at 400V 3P4L, THDi ≤3%, PF 1.0 leading–lagging, with up to 98.5% conversion efficiency. Supports on-grid, off-grid, and automatic switching; 100% unbalanced load capability off-grid. Parallel to 25 units on-grid / 20 off-grid. Intelligent liquid cooling holds cell temperature difference ≤2.5 °C; −30 to +55 °C (derating >45 °C), IP55, C5, ≤65 dB. Three-level over-current protection (PACK/RACK/PCS) and three-level fire prevention with AI cell-health monitoring; fire suppression via gas/smoke/heat detection and hot aerosol. Ethernet/Modbus TCP, iSolarCloud monitoring. Certified IEC 62619/63056/62040/62477/61000/62933, UN 38.3, UL9540A.