Welcome to the rabbit hole of energy storage.

Turns out nobody cares about the capacity but about the discharge rate. Which is why you’ll often hear about how many Gigawatts a certain energy storage project has, and nothing about GWh.

If you think about it for a bit, it does make sense. A lot of solutions would take days to fully discharge, so you might think “oh we have an entire city’s energy consumption for a week in some storage”, but in reality you could maybe power one neighborhood with that cuz of the discharge rate.

So, capacity refers to the “output capacity”.