NREL’s modeling is expected to enable utilities to pass through this eclipse without completely disconnecting any PV, to maximize the production of solar electricity. Hydro generation-power created from flowing water-will also help to fill the void of solar output, though conservation constraints in the West will prevent it from compensating for all of the lost generation. The burden of compensating for the lost energy from solar generators will fall mostly on natural gas powered turbines, which are able to ramp up ahead of the eclipse. This represents the amount of energy needed to power approximately 1 million homes and, if not already anticipated, could create difficulties for portions of the grid network that use solar to meet a significant fraction of electricity demand during the day. is estimated to be over 44 GW today.Įxamining the WECC as a whole, and assuming the worst case scenario-a bright and sunny day-the rolling effects of the eclipse are expected to have the biggest impact at approximately 10:30 a.m., when PV output is projected to drop 5 GW below typical generation levels. It is estimated that both sources provide the WECC with PV capacity of approximately 25 gigawatts (GW), utility scale accounting for two thirds of that. Researchers have already examined potential impacts of the eclipse on generation from power plants and rooftops.
In these areas, the eclipse will occur between 8:00 a.m. The National Renewable Energy Laboratory (NREL) conducted a study of the Western Electricity Coordinating Council (WECC) territory, which covers the vast majority of the Mountain and Pacific Time zones including 14 Western states. While only lasting about two minutes in each location, the output of photovoltaic (PV) power plants across the U.S. Starting above Salem, Oregon and ending above Charleston, South Carolina, this is the first eclipse in 99 years that spans the entire continent.
has experienced anything like it: On August 21, the moon will pass between the earth and the sun, effectively blocking some or most of the sunlight that reaches the earth across a large swath of the United States. It’s been nearly a century since anyone in the U.S.
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