THREAD: In @California_ISO, solar power is now large enough to impact wholesale price and operating dynamics. A new report from @BerkeleyLab documents the market impacts of solar in the 7 ISOs and 10 additional regions. More at https://emp.lbl.gov/renewable-grid-insights 1/x

As the penetration of #solar power rose to 19% in @California_ISO, the market value (energy + capacity) dropped by more than half. Solar-induced changes increased the value of flexibility and benefits of regional integration. More at https://emp.lbl.gov/renewable-grid-insights 2/x

Solar is king in California, supplying 19% of @California_ISO power in 2019, and 2/3 of all solar generation in the seven organized ISO markets in the US. Solar now has noticeable impacts on wholesale prices. More in our new report at https://emp.lbl.gov/renewable-grid-insights 3/x

High levels of #solar power change power system operations, like making evening ramps bigger. It also raises ancillary service needs, particularly regulation reserves, resulting in higher regulation-down prices. More in @BerkeleyLab’s new report at https://emp.lbl.gov/renewable-grid-insights 4/x

Find out how #solar energy and capacity value varies across locations and over time with new interactive visualizations from @Berkeley Lab at https://emp.lbl.gov/utility-scale-solar-value. All of the insights are available at https://emp.lbl.gov/renewable-grid-insights /end

A free webinar summarizing key findings from the report, "Solar-to-Grid: Trends in System Impacts, Reliability and Market Value of Solar in the United States," will be held on February 23 at 10 AM Pacific/1 PM Eastern. Register for the webinar at https://lbnl.zoom.us/webinar/register/WN_lcl8MESeQvqtvojfY0Dfww