[probablypower]

> The storage tech exists and is in practice right now, no advancements needed.

The existence of the tech isn't the issue, it is the logistics, cost and practicality of building it at grid scale. If you try to calculate how many batteries you'd need to store the equivalent energy of a hydro reservoir, or one hour of a nuclear plant, then try to estimate the land required, you'd quickly discover how intractable the issue is.

[epistasis]

I would suggest you go through your own calculations again, because GWH of batteries are being deployed without this supposed "intractable" issue.