Mon, Jul 27 09:23 PM

Sand battery: Finland's answer to a renewable energy headache

Hacker News•Mon, Jul 27, 2026, 04:16 AM•2 min read

16 points, 3 comments on Hacker News

Source: [Hacker News](https://www.cnbc.com/2026/07/25/finland-sand-battery-renewable-energy-storage.html)

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