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this post was submitted on 20 Nov 2023
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In practice they're used more as a sort of capacitor to provide voltage regulation on the grid, basically what gas is doing for reliability. Not sure how often that wouldn't involve a full discharge, but I know most gas in this context is running way below its capability.
It sounds like this is being used for day/night storage here as opposed to spot demand, so it may be using more of the charge range.
I wonder if these batteries have reduced peak power output, can they fulfil the kind of balancing that you are suggesting? I guess if they had enough it would be fine.
I just assume so because of their application in EVs but might also depend what kv level lines they're stepped up for.