• SomeoneSomewhere@lemmy.nz
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    3 days ago

    If you’re thinking of that CGI crane lifting concrete blocks, it’s unfortunately a really bad idea.

    Pumped hydro stores energy by lifting weight uphill, instead. Water is basically the cheapest thing you can get per tonne, and is easy to contain and move.

    To store useful amounts of energy using gravity, you need pretty large elevation differences and millions of tonnes of mass to move.