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The largest energy storage facility under construction in Żarnowiec
Żarnowiec is currently home to the construction of Poland’s largest — and one of Europe’s largest — battery energy storage systems. Its planned capacity is approximately 263 MW, with an energy storage volume of 900–981 MWh. This major project, scheduled for completion in 2027, will play a key role in stabilising Poland’s national power grid.
The investment has secured a 17-year capacity market contract, highlighting its strategic significance. The location is no coincidence — the facility is being built near the Żarnowiec pumped-storage power plant and planned offshore wind farms, allowing for efficient integration of renewable energy sources into the grid.
The Żarnowiec project demonstrates how large-scale battery systems can support Poland’s energy transition and become a cornerstone for further renewable energy development in the country.

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