They have cheaper options to use first like: * exporting to neighbouring grids * charging batteries * reducing hydro output Which you can see in action here

They have cheaper options to use first like: * exporting to neighbouring grids * charging batteries * reducing hydro output Which you can see in action here today: https://www.caiso.com/TodaysOutlook/Pages/supply.html#section-supply-trend https://www.caiso.com/TodaysOutlook/Pages/supply.html#sectio... (You can change the date to March-May to see it actually go negative on imports, i.e. export excess.)