I still think the best solution to power storage is hydro. It seems a lot more scalable than lithium-ion or other chemical oriented solutions. That’s why I was heartened to see what Scotland has planned as discussed in this article. Given Scotland’s growing wind power sources, building battery farms doesnt seem to make sense. So just use Loch Ness as your reservoir. Here is a great view of the plan:
This seems like an obvious solution to the biggest problem with renewable energy, which is its inconsistency in generation. This solution allows the ‘banking’ of energy in the upper reservoir, so when the sun isn’t shining or the wind isn’t blowing, power can still be generated consistently using the hydro generators.
I hope this is just the start of this movement as renewal energy projects grow, and this becomes the de-facto standard for energy storage and distribution.