Pattern Energy and Salt River Project announced they have signed a power purchase agreement for 600 megawatts of SunZia wind energy.

This agreement will help SRP meet growing energy demand across the Phoenix area while maintaining affordability, reliability and sustainability for customers.SRP will receive 400 megawatts of energy beginning this fall and will increase its allocation to 600 megawatts by summer 2027.

“This PPA highlights SRP’s leadership and our partnership, showing how a diverse and cost‑effective energy portfolio can meet Arizona’s needs today while supporting a reliable and resilient grid for the future,” said Pattern Energy’s CEO Hunter Armistead.

SunZia is set to deliver enough energy to power approximately 1 million American homes annually, representing an $11 billion energy investment across the Southwest.

Backed by a 3,650 megawatts of wind resource and a 550‑mile transmission line that moves large amounts of electricity across long distances, it adds a new, clean resource that contributes to SRP’s portfolio of energy resources. These include hydro, wind, natural gas, solar, battery storage and other generation.

SRP currently has 288 megawatts of wind energy serving its customers. The energy from SunZia supports SRP’s plan to more than double the capacity of its power system by 2035 through the addition of thousands of megawatts of renewable energy, as well as natural gas and battery energy storage resources.

“This agreement with Pattern Energy plays a key role in SRP’s all-of-the-above approach to meeting the growing energy needs of the Phoenix metropolitan area reliably, affordably and sustainably,” said Bobby Olsen, Associate General Manager and Chief Power System Executive.  “This project will triple the amount of wind energy on SRP’s grid, helping us make progress toward our carbon reduction goals.”