3 ms·

just use concrete blocks to store energy: http://www.industrytap.com/giant-hanging-concrete-blocks-could-be-the-answer-to-the-worlds-energy-storage-needs/47235

• hn_throwaway_99 8y ago
  If you do the math on this you realize that the low value of gravitational potential energy makes it a horrible storage vehicle on a large scale for pretty much anything except pumped hydro.
• i80and 8y ago
  Gravity has immensely low power density; each 35 metric ton block described in that article only provides a theoretical maximum of 11 kWh. There's a reason gravity batteries usually use large bodies of water for their mass.