TREE NEWS update: Two units at the world’s largest salt cavern compressed-air energy storage project completed full-string startup on the 12th in Jintan, Jiangsu. Each unit has a capacity of 350 megawatts, giving the project the largest total installed capacity of any salt cavern compressed-air energy storage facility worldwide. The startup marks a breakthrough in China’s core technology and system integration capability for large-capacity salt cavern compressed-air energy storage.
World’s largest salt cavern compressed-air energy storage project starts units in Jiangsu
AI take
Salt cavern compressed-air storage is a rare long-duration option that sidesteps the lithium supply chain, so a 350 MW-per-unit milestone matters less for its headline size than for proving the technology at grid scale. It affects grid operators and industrial power users in China first, since the format's geology limits where it can be replicated. Whether unit-level startup translates into sustained round-trip efficiency and cycling performance is the open question.
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