Salt River Project is partnering with a subsidiary of EDP Renewables North America LLC on an energy storage project.

The 200-megawatt storage facility is being built by Flatland Storage LLC near Coolidge. The facility, using lithium-ion batteries manufactured by Tesla, will be online in 2025. It will be capable of supplying up to 45,000 homes with power for up to four hours.

The facility will come with a capital investment of $271 million, with $7 million paid to local governments through tax payments.

“Battery energy storage is an essential piece of SRP’s plan to decarbonize our portfolio and maximize the amount of renewable energy delivered to our customers,” said Bobby Olsen, SRP associate general manager and chief planning, strategy and sustainability executive. “The Flatland Energy Storage Project will help us meet the increasing energy demand of one of the fastest growing areas of the nation.”

This is SRP's second project with EDPR North America. The first was the 200-megawatt Brittlebush Solar Park. The new battery system will be within that energy park to help solar systems match their power collection with the times people are using power, officials said in a press release.

“We’re excited to be partnering with SRP on the largest utility-scale storage project in the EDP Group’s global portfolio to date,” added Sandhya Ganapathy, CEO of EDP Renewables North America.

SRP is aiming to reduce its carbon emissions by 82% by 2035 and be net zero carbon emissions by 2050.