How Mirrors Could Solve our Energy Problem

You could actually use the overabundance of energy to do "reverse" chemistry. Like, carbon capture, for example. That is actually a valid way to store power too, as weird as it might sound. If you overproduce energy, and you create carbohydrates "from thin air", you can then burn them for energy when needed without real CO2 emissions, since these were already in the air. And if you don't need to burn them, just move them into storage.

I should mention that - assuming my information is still valid - carbon capture tech is still being researched/tested, and it is not very efficient (yet), but in principle it is an amazing solution to the energy storage problem of renewable energies. And efficiency doesn't really matter, if the power plant already over-performs. Everything that is above 100% required energy can just be blown into that effort. It's actually carbon-negative that way.

If you have issues with 100% renewable energy having little storage capabilities, then you grab your storage from the air, reducing pollutants and at the same time creating a dense energy source. You can then just use it for storage, or other chemistry, or for areas where dense power is required, or "deep storage"(my term), i.e. just place the carbon back into the earth so it doesn't float around the atmosphere