[elihu]

Ah, so I did. 8.1 kwh per brick sounds like a more substantial amount of energy. They'd need about 12,235 bricks at a 100m height, which is closer to practical.

I'm still kind of skeptical. I mean, pumped hydroelectric storage is pretty cheap. It's hard to compete with that; but then maybe there are uses for a big gravity battery in a dense urban area where hydroelectric isn't an option and maybe even batteries are a potential public health and safety risk. Maybe I've spent too much time alternating between Kicad and Factorio lately, but the concept of plopping down a bypass capacitor the size of a large building to buffer out "noise" on your power grid seems kind of like a normal thing to do.