Enel has signed a virtual power purchase agreement (VPPA) for a large-scale wind+storage hybrid project located in Throckmorton County, Texas.

Enel, through its US renewable subsidiary Enel Green Power North America, has started construction of Azure Sky wind + storage, its first large-scale hybrid project globally to integrate wind and battery storage at one site. Through a 100 MW virtual power purchase agreement (VPPA), Enel will sell to Kellogg Company a 360 GWh portion of the electricity delivered to the grid annually from the Azure Sky wind project, which is equal to 50% of the volume of electricity used across Kellogg’s North American manufacturing facilities. 

Located in Throckmorton County, Texas, the 350 MW wind farm paired with approximately 137 MW of battery storage will be Enel’s third hybrid project in the US that integrates a renewable energy plant with utility-scale battery storage.

The 79 wind turbines at the Azure Sky project are expected to generate over 1,300 GWh each year, which will be delivered to the grid and will charge the battery located in the same facility. The expected annual electricity generated by the Azure Sky project is equivalent to avoiding the emission of over 842,000 tons of CO₂ into the atmosphere each year. The battery storage system will be capable of storing the power generated by the wind turbines, while also providing services to enhance grid flexibility. At around 137 MW, the system will be one of the largest battery storage facilities in the world.