California Achieves Historic 21-Day Streak of 100% Renewable Energy Supply Amid Growing Infrastructure and Favorable Weather.

Stanford University professor Mark Z. Jacobson has broken a record of 21 consecutive days, when California produced enough renewable energy to meet its total electricity demand for up to 100 percent of its total demand for between 15 minutes and 10 hours on the California Independent System Operator grid, which accounts for 80 percent of the state’s electricity. This feat has never occurred before, with previous years, California only occasionally met 100% of demand during a weekend day. The streak of renewable energy is attributed to new solar infrastructure and favorable seasonal weather, but the state’s average renewable capacity is also increasing as wind, solar, and hydropower power surpasses records across the U.S.