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China completes world's largest solar-hydrogen-storage project

By GridDigest Editorial · June 19, 2026 · synthesized from 3 sources

China completes world's largest solar-hydrogen-storage project

CHN Energy finished construction of a 400 MW integrated facility in Jiangsu combining solar PV, a 60 MW/120 MWh battery system, and green hydrogen production capacity of 482 tons annually. Full operations are expected after hydrogen commissioning in August 2026.

State-owned Chinese energy company CHN Energy has finished building what is described as the world's largest integrated solar-hydrogen-storage facility, located in Jiangsu province along China's eastern coast, marking a notable milestone in the country's push to combine renewable generation with multiple storage technologies at scale.

Project Components and Scale

The Jiangsu installation brings together three distinct energy technologies under one system: a 400 megawatt coastal photovoltaic array, a grid-scale battery storage unit, and a green hydrogen production facility. The battery component carries a rated capacity of 60 MW with 120 megawatt-hours of energy storage, while the hydrogen side of the project is designed to produce 482 metric tons of green hydrogen annually. The co-location of solar generation, electrochemical storage, and hydrogen output within a single integrated framework is central to the project's claim of being the largest of its kind globally.

Timeline to Full Operations

Although construction has been declared complete, the facility has not yet reached full commercial operation. Hydrogen system commissioning is scheduled for August 2026, after which the project is expected to begin running at full capacity. The phased pathway to operations reflects the additional complexity of hydrogen infrastructure compared with conventional solar-plus-storage projects, where grid interconnection and battery commissioning typically precede any hydrogen production readiness.

Broader Significance

The project represents a continued effort by China's state energy sector to develop and demonstrate large-scale clean energy integration. By pairing variable solar output with both short-duration battery storage and longer-cycle hydrogen production, the facility is designed to address different timescales of energy balancing—batteries handling near-term fluctuations while hydrogen offers a pathway for surplus renewable energy to be stored and potentially used across industrial or transport applications. CHN Energy's completion of the construction phase positions the Jiangsu project as a reference point for similar hybrid installations being planned or developed elsewhere in the world.

Sources (3)

Methodology: This article was synthesized from three source reports covering the same story, consolidated into a single coherent account with rephrased and restructured prose.