Two salt-cavern compressed-air energy-storage units in Jintan (金坛) completed full-unit startup, each with 350 megawatts of capacity.

Two units at a salt-cavern compressed-air energy-storage project in Jintan (金坛), Jiangsu (江苏), completed full-unit startup on September 12. Each unit has a reported capacity of 350 megawatts, identifying a power rating rather than stored energy in megawatt-hours.

The report describes the project as the world’s largest salt-cavern compressed-air energy-storage project by total installed capacity. It characterizes the startup as progress in large-capacity technology and system integration, but does not provide independent comparative documentation.

Full-unit startup is the specific milestone disclosed, not a stated completion of commercial-operation acceptance. The source contains no energy-storage capacity, discharge duration, round-trip efficiency, project cost, or commercial commissioning date.