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China’s largest CAES plant, with 600 MW capacity, is now fully operational, using salt caverns and advanced tech to store energy efficiently and cut emissions.
The Huai'an Salt Cavern Compressed Air Energy Storage project in China is now fully operational, becoming the world’s largest CAES station with 600 MW capacity and 2,400 MWh of storage.
Developed with a $520 million investment, it uses underground salt caverns 1,150 to 1,500 meters deep and “molten salt + pressurized thermal water” high-temperature adiabatic technology to achieve about 71% efficiency without fossil fuel combustion.
Shanghai Electric supplied core equipment, including turbines and storage tanks.
The facility supports grid stability, generates 792 million kWh annually—enough for about 600,000 homes—and reduces CO₂ emissions by 600,000 tons yearly.
The first unit began full-load operation in December 2025, with the second successfully grid-connected in early 2026.
La planta CAES más grande de China, con una capacidad de 600 MW, está ahora en pleno funcionamiento, y utiliza cavernas de sal y tecnología avanzada para almacenar energía de manera eficiente y reducir las emisiones.