Vistra Completes Expansion of Battery Energy Moss Landing BESS

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NEWS RELEASE
FOR IMMEDIATE PUBLICATION
Vistra Completes Expansion of Battery Energy
Storage System at its Flagship California Facility
World’s largest battery facility just got bigger with additional 100 MW / 400 MWh now operational, helping bolster grid reliability this summer
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MOSS LANDING, California — Aug. 19, 2021 — Vistra (NYSE: VST) recently completed construction on Phase II of its Moss Landing Energy Storage Facility. The battery system is now storing power and releasing it to California’s grid when it is needed. The 100-megawatt expansion now brings the facility’s total capacity to 400 megawatts/1,600 megawatt-hours, making it the largest of its kind in the world.
“This facility provides a solution California desperately needs and this expansion was able to come online at the right time – as the summer heat intensifies and demand for electricity is at its highest. It is possible because of the partnership between Vistra and the State of California, Pacific Gas and Electric Company, LG Energy Solution, and Burns and McDonnell,” said Curt Morgan, chief executive officer at Vistra. “The state’s laudable immense buildout of intermittent renewable power has both lowered emissions and presented a reliability challenge. California produces an excess amount of renewable power during the day while the sun is up, but often struggles to meet demand as the sun goes down. Our Moss Landing battery system helps to fill that reliability gap, storing the excess daytime power so it doesn’t go to waste and then releasing it to the grid when it’s needed most.”
Announced just 15 months ago with construction starting in September 2020, the Phase II expansion project was completed in July 2021, ahead of schedule despite the many challenges presented by the COVID-19 pandemic.
Utilizing technology from LG Energy Solution, Vistra’s enormous lithium-ion battery system is co-located on the site of its existing Moss Landing Power Plant in Monterey County, a site that’s been providing electricity to Californians since 1950. Burns & McDonnell provided engineering, procurement, and construction (EPC) expertise for the expansion.
Morgan continued, “What’s great about this particular site is that it has the space to support even further expansion – up to 1,500 MW/6,000 MWh – while responsibly utilizing our existing site