My guess is that sometimes it costs money to provide energy. I would imagine it has to do with supply and demand at that time. https://www.technologyreview.com

My guess is that sometimes it costs money to provide energy. I would imagine it has to do with supply and demand at that time. https://www.technologyreview.com/s/601221/texas-and-california-have-too-much-renewable-energy/ https://www.technologyreview.com/s/601221/texas-and-californ...