Building New Solar Storage Plants. APS plans to build an additional 500 megawatts of solar storage and stand-alone battery storage by 2025. The first project will be a 100-megawatt solar-storage plant. APS expects to issue a request for proposals this summer. APS is already partnering with Tempe-based First Solar
to build a first-of-its-kind solar-plus-storage project
that will be one of the largest in the country when completed in 2021.
Delivering More Clean Energy When Needed. When solar production declines late in the afternoon and energy usage is still high, electricity companies need a reliable, flexible source of power to serve their customers. Traditionally, that source has been exclusively natural gas. Today’s announcement signals a new direction: APS will use 150 megawatts of solar-fueled battery storage to meet part of the demand when energy usage peaks.
The battery storage will come from two projects: a 100-megawatt battery provided by AES
, and a 50-megawatt battery by Invenergy. Additional natural gas will come from a contract with Calpine for 463 megawatts of energy; however, instead of a traditional 20-year contract, the purchase agreement with Calpine
is seven years, allowing APS the flexibility to take advantage of cleaner technologies in the future as they mature. This is part of a long-term clean-energy transition in which renewable and storage technologies will play an increasingly important role.
Today’s announcement continues APS’s record of leadership in solar storage technology. Solana Generating Station
in Gila Bend was the largest thermal solar-storage plant in the world when it began operation in 2013 and has been providing 100 percent of its generation output to APS customers since.
For more information on APS’s solar storage and other clean-energy advances, visit azenergyfuture.com
serves about 2.7 million people in 11 of Arizona’s 15 counties, and is the Southwest’s foremost producer of clean, safe and reliable electricity. Using a balanced energy mix that is 50 percent carbon-free, APS has one of the country’s most substantial renewable energy portfolios, and owns and operates the Palo Verde Generating Station, the country’s top power producer and largest producer of carbon-free energy. The company is also a proven leader in introducing technology and services that offer customers choice and control over their energy consumption. With headquarters in Phoenix, APS is the principal subsidiary of Pinnacle West Capital Corp
. (NYSE: PNW).