The linked article on Utility-Scale Energy Storage was posted to Energy Central July 10, 2020. The primary thrust is that stationary energy storage is too expensive in the long run to support a 100% renewables grid, and that only managed EV charging will get us there.

https://energycentral.com/c/ec/utility-scale-energy-storage-when-free-isn%E2%80%99t-cheap-enough