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by deathanatos 3433 days ago
> MW are a measure of power, not energy. You mean MW-h. It's incorrect to say something has a MW capacity when discussing energy storage.

He's quoting TFA,

> With a capacity of 20 MW/80 MWh

It would seem sensible that the system has both metrics: a total capacity of storage, and a total rate at which it can supply that storage to things connected to it.

Further, my understanding is that the parent you're responding to is correct: pumped-storage hydro tends to have much greater generation rates; Wikipedia lists an example of 360MW.