Lift based storage? So you have some heavy weights at the top of a building, and as they fall they generated energy. At night or in low energy consumption times, you buy energy cheap and pull the weights back to the top.

This is an old school way of doing it.

There is a system in Nevada that pushes a train up a mountain, which generates electricity as it comes back down again.

It’s simple and reliable. Nice!

Lift Energy Storage Technology: A solution for decentralized urban energy storage

Turning skyscrapers into giant ‘gravity batteries’ could cut power bills, say scientists