In a Friday update, the U.S. Energy Information Administration reports that for a brief period on March 11th, utility-scale solar accounted for 40% of net grid power produced in California. The EIA says that, combined with residential and commercial rooftop generation, “the total solar share of gross demand probably exceeded 50% during the mid-day hours.”
During the same window, real-time wholesale electric rates dipped below zero, compared to prices between $14 and $45 per megawatt-hour in the same windows from 2013-2015. That’s because some forms of power generation, including nuclear, can’t be easily shut down when solar generation peaks, adding up to a net market oversupply.
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