2 ms·

We already have gravity batteries. They're called hydro-electric dams.

• vardump 4y ago
  Sure, but hydro is a rather limited resource. This could allegedly scale way further.
  • JonChesterfield 4y ago
    On the basis that there are more mines than hills with lakes on?
    • RGamma 4y ago
      There's approaches with compressed liquids, i.e. hydraulically lifting mass. These would be more compact and could be built almost anywhere. See e.g. https://heindl-energy.com/ https://heindl-energy.com/