In our latest Short-Term Energy Outlook (STEO), we expect U. electricity generation will grow by 1. 6% in 2027, when it reaches an annual total of 4,423 BkWh. The. . The oldest solar power plant in the world is the 354-megawatt (MW) Solar Energy Generating Systems thermal power plant in California. Source: Berkeley Lab, Utility-Scale Solar Data Update 2025 Copyright (c) 2025, The Regents of the University of California, through Lawrence Berkeley National Laboratory (subject to receipt of any required approvals from the U. The report also looks at retirements, planned retirements, and cancellations since 2017. Or support our Kickstarter campaign! In August 2024, utility-scale generation of solar electricity averaged 63. 1 gigawatthours between 10:00 a. each day in the Lower 48 states, 36% more than for the same. . Solar and wind accounted for 91% of new US electrical generating capacity added in the H1 2025, according to data just released by the Federal Energy Regulatory Commission (FERC), which was reviewed by the SUN DAY Campaign of data.
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