On: Solar power is becoming bigger than nuclear

[micw]

Thing is that you need incredible large masses in incredible heights.

Example: Lifting a 10-metric-ton stone by 36 meters stores just about 1 kilowatt-hour (kWh) of energy. This is roughly equivalent to the capacity of a small power station used for a camping trip.

[leonidasrup → micw]

This is the reason whey pumped hydroelectric energy storage (PHES) systems are so large. Gravity is quite a weak force.

https://en.wikipedia.org/wiki/Pumped_hydro