Short-term energy storage like the inertia on the grid is the tiniest problem with grid stability at 100% renewables. The energy in the spinning hunks of iron i

Short-term energy storage like the inertia on the grid is the tiniest problem with grid stability at 100% renewables. The energy in the spinning hunks of iron is tiny compared to even a small grid-scale battery, and the inverters on those batteries can provide a far better response to changes in grid frequency than the synchronous generators ever could. It's basically the one thing which is 100% not a concern with a renewable grid.