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# World’s largest compressed air energy storage project in China
- URL: https://www.energyinsider.io/worlds-largest-compressed-air-energy-storage-project-in-china/
- Published: 2026-01-14T13:15:45.000Z
- Updated: 2026-01-14T11:12:56.000Z
- Description: A 300 MW compressed air energy storage (CAES) facility in Feicheng, China's Shandong province, has been completed by Chinese developer ZCGN.
- Author: Simon Green
- Tags: CAES, LDES, Energy Storage, Asia

Chinese developer ZCGN has completed a groundbreaking 300MW compressed air energy storage (CAES) facility in Feicheng, Shandong province, setting a new record as the world's largest CAES system.

**Key Highlights:**

- **Record-Breaking Scale:** This facility surpasses the previous largest CAES project, a 100 MW installation by the Institute of Engineering Thermophysics of the Chinese Academy of Sciences, completed in October 2022.
- **Advanced Technology:** The plant features a multi-stage wide-load compressor and a high-load turbine expander, complemented by high-efficiency supercritical heat exchanger technology and integrated control systems.
- **Cost and Efficiency:** Impressively, ZCGN's facility is 30% cheaper than its 100 MW predecessor and achieves an efficiency of 72%.

The project uses an underground salt cavern reaching depths of up to 1,000 meters. The cavern boasts a gas storage capacity of more than 500,000 cubic meters.

Thanks to the country’s advanced permitting regime, the project was completed in only two years at a cost of approx. $210m.

This innovation highlights China’s rapid advancements in energy storage technology, demonstrating significant potential for cost reductions and efficiency improvements in long duration energy storage projects.