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China completes first full-scale underwater pumped storage trial at 65 m depth

DEC’s “Dongchu No. 1” prototype completed more than 100 charge-discharge cycles at 65 meters depth in a freshwater lake.From ESS News The Dongfang Research Institute, a subsidiary of China Dongfang Electric Corporation (DEC) announced the completion of a 10-day full-condition underwater trial of China’s first kilowatt-scale submerged pumped storage energy system, marking a step forward in the country’s development of alternative long-duration st…
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DEC’s “Dongchu No 1” prototype completed more than 100 loading and unloading cycles at a depth of 65 metres into a freshwater lake. The Dongfang Research Institute, a subsidiary of China Dongfang Electric Corporation (DEC), announced the completion of a 10-day underwater test under real conditions of China’s first kilowatt-scale submerged pumping energy storage system, a step forward in the development of long-term alternative storage technologi…

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pv magazine India broke the news in on Friday, January 23, 2026.
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