• Microsoft signs a long-term agreement with Clearway for 335 MW of wind energy from the Mount Storm project in West Virginia.
• The $735M repowering will cut turbines by 40% while boosting efficiency and extending the project’s lifespan by 35 years.
• Clean energy will help Microsoft meet its 100/100/0 goal—matching all electricity use with zero-carbon sources by 2030.

Microsoft has inked a long-term power purchase agreement (PPA) with Clearway Energy Group for 335 megawatts (MW) of wind energy from the repowered Mount Storm wind farm in Grant County, West Virginia.

The deal supports Microsoft’s “100/100/0” clean energy ambition—matching 100% of its electricity consumption, 100% of the time, with carbon-free energy by 2030. It also advances the tech giant’s broader goal of becoming carbon negative by the end of the decade.

“Clearway is thrilled to announce our work with Microsoft on the Mount Storm project. We are proud to support the development of renewable energy and economic growth in the community,” said Valerie Wooley, Senior Vice President of Origination at Clearway.

Clearway acquired the Mount Storm facility in 2021 and is now investing $735 million to repower the wind farm. The overhaul includes reducing the number of turbines from 132 to 78, replacing them with modern, more efficient models. Decommissioned turbines will be recycled, reused, or resold.

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The upgraded facility, built using American-made equipment, is expected to add 35 years to the project’s life span. It will also generate substantial community benefits, including millions in tax revenue, hundreds of construction jobs, and new funding for local programs.

By 2025, Microsoft aims to power all its buildings and datacenters globally with 100% renewable energy. The Mount Storm agreement brings the company closer to that milestone.

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