Day: July 11, 2018💾

"During the solar eclipse that passed across the continental United States on August 21, 2017, solar output on the California Independent System Operator (CAISO) electric system dropped while the sun was partially obscured. Much of the decrease in solar output was made up by increased electricity imports and increased generation from thermal units, most of which is fueled by natural gas."

"Although California was not in the path of totality during the eclipse, meaning the sun was not completely obscured, California contains 43% of the national total for utility-scale solar and 40% of small-scale solar, (as of May 2017). Much of the state’s solar capacity is located in areas where sunlight was obscured by as much as 60%–70% during the eclipse."

"Based on an average of the previous five weekdays, CAISO’s solar power output typically increases to about 9.1 gigawatts (GW) between 10:00 a.m. and 11:00 a.m. Pacific Time, or to roughly 31% of total load. On August 21, as the moon partially obscured sunlight, CAISO’s solar power output fell to a low of 3.6 GW for that hour, about 60% lower than normal."