Enel Green Power North America has started operations at its 450MW High Lonesome wind farm in Texas.
The $720m project is expected to generate about 1.9 terrawatt-hours of electricity a year.
A 12-year power purchase agreement has also been signed for 20.6MW to supply Danone North America, meaning that the project, located in Upton and Crockett Counties, will be expanded by 50MW to 500MW.
Construction of the additional capacity is currently underway and is due online in the first quarter of 2020.
The agreement between Enel and Danone North America will provide enough electricity to produce the equivalent of almost 800 million cups of yogurt and over 80 million gallons of milk each year.
It will support the food and beverage company's commitment to securing 100% of its purchased electricity from renewable sources by 2030.
Enel Green Power chief executive Antonio Cammisecra said: "The start of operations of Enel's largest wind farm in the world marks a significant achievement for our company and reinforces our global commitment to accelerated renewable energy growth
"This milestone is matched with a new partnership with Danone North America to support their renewable goals, a reinforcement of our continued commitment to provide customers with tailored solutions to meet their sustainability goals."
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