Re:Google is officially 100% sun and wind powered – 3.0 giga...
by drwl on Friday December 01, 2017 @12:32PM
(#15825507)
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-californ...
And do they just make an exchange with the grid for the same amount of energy?