The China Energy Investment Corp (CHN Energy) fully completed construction on June 10, 2026, of the Guohua Rudong solar-hydrogen-storage integrated project in Jiangsu province. The completion of the largest project of its kind marked another step in China’s efforts to combine large-scale solar generation with battery storage and green hydrogen production.
The project, developed by Guohua Energy Investment Co., Ltd., a subsidiary of China Energy Investment Corporation Co., Ltd., inaugurates a new energy collaborative operation model that deeply integrates power sources, the transmission grid, loads, and energy storage systems with hydrogen energy.
The project, located at Yangkou Port, has a total photovoltaic capacity of 400,000 kilowatts, with a newly built 220-kilovolt onshore step-up substation, an electrochemical energy storage station, and a hydrogen production station able to produce 1,500 standard cubic meters per hour. Together, these facilities establish a complete industrial chain encompassing green electricity generation, storage, and conversion.
The photovoltaic plant is expected to generate 468 million kilowatt-hours of electricity annually, enough to meet the power demands of nearly 200,000 households while offsetting over 300,000 metric tons of carbon dioxide emissions. The collocated power storage facility effectively smooths grid fluctuations and enhances renewable energy accommodation.
In addition, the project can also produce 482 metric tons of high-purity green hydrogen annually, achieving a zero-carbon production process. The hydrogen is designated for supply across the Yangtze River Delta, supported by synchronously commissioned hydrogen refueling stations, thus completing the full value chain for green hydrogen application.
The project also incorporates coastal ecological restoration measures. The company said the development occupies about 2.9 km2 of tidal-flat land and was implemented alongside a broader Spartina alterniflora control and coastal wetland restoration program covering approximately 4.3 km2.
The project is part of China’s third batch of large-scale wind and solar power bases. Its significance lies not only in its 400 MW PV capacity but also in its integrated operating model, combining coastal solar generation, battery storage, traceable green hydrogen production and local hydrogen consumption within a single commercial demonstration project.
Sources:
State-owned Assets Supervision and Administration Commission, June 18, 2026. http://en.sasac.gov.cn/2026/06/18/c_20829.htm
PV Magazine, June 15, 2026. https://www.pv-magazine.com/2026/06/15/worlds-largest-solar-hydrogen-storage-project-goes-online-in-china/
Interesting Engineering, June 11, 2026. https://interestingengineering.com/energy/china-completes-largest-solar-hydrogen-project
Video: @ie-explains, June 20, 2026. https://www.youtube.com/shorts/N1_xSH1RSU0
