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January 23,2026

China Successfully Tests First Full-Scale Underwater Pumped Storage

China’s Dongchu No. 1 underwater pumped storage system completed a 10-day trial at 65-meter depth, performing over 100 charge-discharge cycles. The test in Minhu Lake, Fujian, validated structural sealing, pressure control, mechanical durability, and bidirectional energy conversion for kilowatt-scale submerged storage.

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