>I understand storing the energy in batteries is currently very expensive economically and materially From what I understand, they recently have gotten cheap e

>I understand storing the energy in batteries is currently very expensive economically and materially From what I understand, they recently have gotten cheap enough that they are starting to be adopted on a large scale. And one advantage they have over many alternatives is they can respond instantly, so they can be used to deal with the momentary shifts in the supply-demand balance that all electric utilities experience on a daily basis. As a result they save a lot more money than just dealing with the daily cycle.