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Managing the solar eclipse

On the morning of Monday, August 21, 2017, a total solar eclipse passed over the Pacific Northwest, affecting the California ISO’s solar resources supplying power to the grid. Learn about the challenges of operating an electric grid during an eclipse and how the ISO prepared for the reduction in sun power. Use the below graphs to view the drop and restart of solar generation, along with electrical demand in the ISO system during the eclipse.





Quick links

View a summary of the Solar Eclipse.
Read the report on ISO system performance during the eclipse.
Listen to audio of pre-eclipse and post-eclipse press conferences.
Presentation - solar eclipse ISO impact analysis.
View the pre-eclipse and post-eclipse news releases.
Click here to get answers to frequently asked questions.
Click here for the Aug. 10, 2017 Solar Eclipse Informational Call.
Read about the western EIM’s management plans.