https://www.energy.ca.gov/sites/default/files/2019-12/energy_storage_ada.pdf https://www.energy.ca.gov/sites/default/files/2019-12/energy... California already

https://www.energy.ca.gov/sites/default/files/2019-12/energy_storage_ada.pdf https://www.energy.ca.gov/sites/default/files/2019-12/energy... California already has 4500 GWh of storage. They don't have those peak power levels (currently, 4.5GW) but that's a matter of capital investment into pumps and generators. Not that that is even needed. California has a very large coastline with extremely reliable wind power. For example, there isn't a single spot anywhere along the coast of California that is forecast to have <8kts of wind for more than a day this month. Overprovisioning of wind power is a much bigger part of the solution to the duck curve than storage is.