{"id":85170,"date":"2025-06-09T09:07:18","date_gmt":"2025-06-09T07:07:18","guid":{"rendered":"https:\/\/www.vpsolar.com\/?post_type=product&#038;p=85170"},"modified":"2026-09-01T09:00:37","modified_gmt":"2026-09-01T07:00:37","slug":"sungrow-powerstack-ci-storage","status":"publish","type":"product","link":"https:\/\/www.vpsolar.com\/en\/product\/sungrow-powerstack-ci-storage\/","title":{"rendered":"Sungrow PowerStack &#8211; 255\/510CS \u2013 125 kW &#8211; 257\/514 kWh Energy Storage System"},"content":{"rendered":"<p>The Sungrow PowerStack ST CS is an all-in-one liquid-cooled battery energy storage system (BESS) designed for medium-to-large C&amp;I applications, that can be configurated both in the 2 hours autonomy version and in the 4 hours version.<\/p>\n<p>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%.<\/p>\n<p>The liquid cooling system, managed by an AI algorithm, keeps the cell temperature difference below 2.5\u00b0C and cuts daily system heat loss by 33%. The product is pre-assembled and pre-commissioned at the factory, reducing on-site commissioning time.<\/p>\n<p>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\u00b0C to 50\u00b0C.<\/p>\n<p>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.<\/p>\n<p>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.<\/p>\n<p>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.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>All-in-one liquid-cooled battery energy storage system (BESS) Sungrow PowerStack ST255CS and PowerStack ST510CS-4H, built for C&amp;I scenarios requiring high efficiency and rapid installation.<\/p>\n<ul>\n<li>Rated power 125 kW<\/li>\n<li>Storage capacity 257 or 514 kWh<\/li>\n<li>DC\/AC conversion efficiency up to 98.5%<\/li>\n<li>AC output 400 V<\/li>\n<li>Liquid cooling with AI-driven thermal control<\/li>\n<\/ul>\n","protected":false},"featured_media":85169,"template":"","meta":[],"product_brand":[],"product_cat":[2635,10383,7760],"product_tag":[11321,11322,11323,10930,9845,11326,10915,11138,10913,11328,9788,11325,11327,10914,7796,11324,11319,11320,9846,7739,11318,11315,11316,11317],"class_list":{"0":"post-85170","1":"product","2":"type-product","3":"status-publish","4":"has-post-thumbnail","6":"product_cat-storage-battery-en","7":"product_cat-bess-battery-en","8":"product_cat-sungrow-battery-en","9":"product_tag-125-kw-energy-storage","10":"product_tag-257-kwh-battery-storage","11":"product_tag-514-kwh-battery-storage","12":"product_tag-battery-energy-storage-system","13":"product_tag-bess-en","14":"product_tag-ci-battery-storage","15":"product_tag-ci-energy-storage","16":"product_tag-commercial-battery-storage","17":"product_tag-commercial-energy-storage","18":"product_tag-ems300cp","19":"product_tag-energy-storage-system","20":"product_tag-grid-forming-bess","21":"product_tag-industrial-battery-storage","22":"product_tag-industrial-energy-storage","23":"product_tag-isolarcloud-en","24":"product_tag-lfp-battery-storage","25":"product_tag-liquid-cooled-bess","26":"product_tag-liquid-cooled-energy-storage","27":"product_tag-powerstack-en","28":"product_tag-sungrow-en","29":"product_tag-sungrow-bess","30":"product_tag-sungrow-powerstack","31":"product_tag-sungrow-st255cs","32":"product_tag-sungrow-st510cs-4h","34":"first","35":"instock","36":"shipping-taxable","37":"product-type-simple"},"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v26.7 - 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