Calpine has announced the completion of a 25 MW expansion project at The Geysers geothermal complex in Sonoma County, California.
The addition builds on continued investments in The Geysers over decades and follows the completion of a 38 MW energy storage system at the site in 2024.
The new capacity will generate enough electricity to power over 25,000 homes each year, according to Aimee Blaine, Senior Vice President of Calpine's geothermal region.
“As California's electricity demand continues to grow, investments in reliable, around-the-clock renewable energy are more important than ever,” said Blaine.
“The Geysers is one of the nation's most important geothermal resources, and this expansion reflects our commitment to strengthening grid reliability while advancing California’s clean energy goals.”
For over 65 years, The Geysers has provided clean, geothermal energy across California, and is operated by Calpine, a unit of Constellation Energy Corporation, a Fortune 200 company headquartered in Baltimore and the nation's largest producer of clean energy.
Of the 25 MW expansion, 18 MW will be directed to Clean Power Alliance (CPA), a locally operated, not-for-profit electricity provider which serves customers across Southern California, providing reliable, around-the-clock renewable power as demand for clean electricity continues to grow.
The remaining 7 MW, which was brought online last year, is being supplied to MCE to support Bay Area residents and businesses.
“Clean Power Alliance is committed to delivering dependable clean energy to our customers, and geothermal power plays an important role in providing around-the-clock renewable electricity,” said Matthew Langer, Chief Operating Officer, Clean Power Alliance.
“Partnerships like this strengthen California's clean energy future while supporting a more resilient and sustainable grid.”