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€170M Grid Storage Upgrade: Estonia’s Hertz 2 Battery Park Goes Live

Grid storage keeps getting more strategic for the Baltics, and Estonia just added another 100 MW to its arsenal. On Tuesday, the Hertz 2 battery storage park in Aruküla, just outside Tallinn, went fully online, according to ERR. Hertz 2 has a capacity of 100 MW and 200 MWh, and together with its sister facility Hertz 1 in Kiisa, which came online in February, the combined Hertz complex now delivers 200 MW of power and 400 MWh of storage, making …

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On Tuesday, the Hertz 2 battery storage park with a capacity of 100 megawatts and a storage capacity of 200 megawatt-hours was opened in Aruküla, Raasiku municipality.

·Estonia
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On July 7, the Hertz 2 battery energy storage system with a capacity of 100 MW and a capacity of 200 MWh was officially opened in Arukila, Harju County, Estonia. Together with Hertz 1, which was opened in Kõis in February, they form one of the most powerful complexes of this type in continental Europe and help ensure the stability of the Baltic States’ electricity system. This is the second major Baltic Storage Platform project […]

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Eesti Rahvusringhääling broke the news in Estonia on Tuesday, July 7, 2026.
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