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New Renewable Power Storage Method

storage-concrete-balls

Tests have been completed in the German Bodensee with a 20 ton, 3 meter concrete hollow sphere, sunk to the bottom of the lake. When water flows into the sphere, electricity can be generated. Alternatively, wind power can be used to empty the sphere again and as such (virtually) load the battery again. Future dimensions are thought to be 20 meter or lager (4,200 m3 volume). Assuming 100 meter of water above the sphere, that’s an amount of storage energy 1167 kWh or 86 Tesla Powerwall 2.

[spiegel.de] – Riesige Betonkugel speichert Energie

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