California Clean Energy Committee

Here is some important data about dumping renewables from Scientific American--

In California, where renewable energy makes up 20 percent of retail electricity sales, an overproduction of solar and wind during the middle of the day forced the state to dump 19 gigawatt-hours of prepurchased renewable energy last year.  Electrolyzers could effectively serve as energy storage by using that excess generation to make renewable hydrogen.

Full article is here.