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A comment on A sand battery could transform clean energy. Parent comment

Re:A sand battery could transform clean energy by Schroedingersat on Friday November 04, 2022 @10:39PM (#33477244)
Vanadium flow batteries are about half but will not stay that way if scaled (vanadium production is too limited).

Iron flow is currently 'it will be dirt cheap later we swear, ask us about a demo project'. So probably substantially more expensive. No compelling reason not to believe them though.

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Re:A sand battery could transform clean energy by Schroedingersat on Thursday November 10, 2022 @01:02AM (#33542854)
This was wrong. Vanadium electrolyte is only 1-2 molar. Vanadium production on the order of current generation can support ~100GWh/yr
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