The physical battery idea has been a thing for decades in the form of a pump storage plant where during times of excess electricity, they pump water up a hill, and when power is needed it works like a hydroelectric power plant. The problems with these however is that in order to get a meaningful amount of power and longevity, you need a lot of water and space to build one of these which makes them massive and expensive up front. I have one near me, but I also live near one of the biggest lakes in the world, which helps.

Hey, on the bright side, manpower is manpower.

Does Carmen San Diego work there or something?

It’s what plants crave I guess.

I’d be worried about the now excess co2 levels disrupting the normal saturation levels in the groundwater.