SRP and EDPR NA partner on 200 MW battery storage project in Arizona

Salt River Project (SRP) and Flatland Storage LLC, a subsidiary of EDP Renewables North America (EDPR NA), have announced a partnership to bring 200 MW of energy storage to Arizona’s grid. 

The Flatland Energy Storage Project, located near Coolidge, Arizona, will use Tesla-manufactured lithium-ion batteries and is expected to be operational by 2025.

The 200 MW/800 megawatt-hour system will provide enough capacity to power up to 45,000 homes for four hours during peak demand, enhancing grid reliability by storing excess energy for use during high-demand periods. 

The project will also conserve more than 169 million gallons of water annually compared to traditional energy generation methods.

The $271 million investment will contribute to the local economy, creating 60 construction jobs and two permanent positions while generating $7 million in tax revenue for local governments. 

Flatland will integrate with the Brittlebush Solar Park, also operated by EDPR NA, to store energy from both the grid and solar facility, aligning output with peak customer demand.

SRP’s Chief Planning, Strategy, and Sustainability Executive Bobby Olsen highlighted the project’s role in advancing SRP’s carbon reduction goals, including an 82% decrease in carbon intensity by 2035 and net-zero emissions by 2050.

EDPR NA CEO Sandhya Ganapathy noted this as the largest utility-scale storage project in the EDP Group’s portfolio, emphasizing its significance in modernizing the U.S. power grid and accelerating renewable energy adoption.

SRP’s growing portfolio includes nearly 1,300 MW of storage and 3,000 MW of carbon-free resources, with more solar and storage projects planned by 2028 to support the transition to cleaner energy while phasing out 1,300 MW of coal resources.