Instead of physical batteries, why not build pump storage facilities where water is pumped and stored at significant elevation in man-made reservoirs by the wind and solar running the pumps upward and released through turbines to provide the energy when needed? We have a huge one by Ludington, MI on Michigan’s West coastline with Lake Michigan.
The problem with that is the winds rarely blow at night (they are powered by the sun, after all) and the sun doesn’t shine at night. So you really have no “green” way to use pumped storage.
The greenies have made it very hard, nearly impossible, to build new pumped storage facilities. The permitting alone will take you 10-15 years.
It took almost EIGHTEEN years to permit the TransWest Express 732-mile transmission line that will run from Wyoming to California.