At 8:40 p.m. on May 16, the first phase of Shandong Energy New Energy Group’s independent shared energy storage project in Dongying was successfully connected to the grid.
Source: Shandian News
At 8:40 p.m. on May 16, the first phase of Shandong Energy New Energy Group’s independent shared energy storage project in Dongying was successfully connected to the grid. The project features China’s largest single-unit advanced high-voltage cascade energy storage system at the 100 MW scale, marking a significant milestone in the country’s energy storage development. Seen as a landmark project for Shandong Energy Group’s push toward large-scale new energy storage, the facility is expected to play a vital role in supporting the new power system and accelerating the clean energy transition.
The energy storage station is designed to charge during off-peak hours and discharge during peak demand, improving overall grid stability. The full project is planned to deliver 200 MW/400 MWh of capacity, with the first phase contributing 100 MW/200 MWh. In addition to peak shaving and frequency regulation, the system enables more efficient integration of renewable energy. It is estimated to support the delivery of over 70 million kWh of additional green electricity annually from nearby renewable sources and cut carbon emissions by roughly 70,000 tonnes per year—bolstering grid reliability as clean energy capacity expands.
The project adopts 35kV high-voltage cascade technology and an intelligent energy storage system developed in-house by Xinfengguang Electronics, a subsidiary of Shandong Energy New Energy Group. The system consists of four 25 MW/53.6 MWh lithium iron phosphate (LFP) battery units, each using 314Ah cells paired with 104-series liquid-cooled battery packs—offering both high efficiency and robust performance.
To ensure safety and durability across its lifecycle, the system incorporates liquid cooling and a four-level safety architecture spanning the cell, module, rack, and system levels. Advanced technologies such as AI-driven battery health diagnostics have also been introduced, positioning the project as a technical benchmark among Shandong’s energy storage demonstration initiatives.
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