Question must be, what's the point of uber large storage sites? Storage is essential, but where is the economy of scale of large sites, how are they more economic than small - say container-sized, a ~1 MWh - ones? Having smaller systems, closer to producer, must also save on transmission capacity, no? Not to mention, given the geopolitical situation, their safety.
I'm also convinced that separating generation and storage is simply an awfully, comically bad idea: generation that needs storage - solar and wind - is DC, storage is also DC. Transmission is usually AC or at least goes through AC/DC conversion at some point.
Why wasting a lot of additional energy to store it by doing an extra unneeded AC/DC conversion which happens if storage is separate from generation? Instead of storing DC energy as it is produced and discharging it - by converting to AC and feeding into the grid - as it is needed?
I'm also convinced that separating generation and storage is simply an awfully, comically bad idea: generation that needs storage - solar and wind - is DC, storage is also DC. Transmission is usually AC or at least goes through AC/DC conversion at some point.
Why wasting a lot of additional energy to store it by doing an extra unneeded AC/DC conversion which happens if storage is separate from generation? Instead of storing DC energy as it is produced and discharging it - by converting to AC and feeding into the grid - as it is needed?