Kazakhstan has signed its largest power purchase agreement to date with TotalEnergies—a 25-year agreement for the 1 gigawatt Mirny onshore wind project, the energy company said in a June 9 news release.

The $1.4 billion project, which will include a 600 megawatt-hour battery energy storage system and about 200 turbines, will be located in the Zhambyl region of north Kazakhstan. All electricity produced, enough for an estimated 1 million people, will be sold to Kazakhstan’s Financial Settlement Center of Renewable Energy.

TotalEnergies CEO Patrick Pouyanné said the project is a significant milestone for the company’s multi-energy strategy.

“As a global energy leader, TotalEnergies is proud to drive the energy transition in Kazakhstan through such an innovative project as Mirny,” said Pouyanné. “This wind and battery project will contribute to the supply and security of the Kazakh power grid.”

TotalEnergies said it is developing the wind project in partnership with National Wealth Fund Samruk-Kazyna and the National Company KazMunayGas. The project is expected to avoid about 3.5 million tons of CO2 emissions annually during the 25-year PPA.