APS, First Solar Partner on Arizona's Largest Battery Storage Project
Two leaders in renewable energy, Arizona Public Service and First Solar, are bringing a first-of-its-kind 50-megawatt (MW) solar-fueled battery to the desert to provide clean power to Arizonans on hot summer days. This project will make Arizona home to one of the largest battery storage systems in the country. The innovative design models how the future of solar and storage can work together to deliver power to customers during peak hours.
First Solar will build and operate this flagship facility that includes a 65-MW solar field to charge the battery. APS has signed a 15-year power-purchase agreement with First Solar that will enable APS to use the stored battery power when energy use is at its peak later in the day.
This project adds to the more than one million solar panels and three grid-scale batteries currently on APS’s system. Over the next 15 years, APS plans to adopt more than 500 MW of additional battery storage.
This project adds to the more than one million solar panels and three grid-scale batteries currently on APS’s system. Over the next 15 years, APS plans to adopt more than 500 MW of additional battery storage.
The project was developed in response to APS’s request for peaking capacity resources to serve customers between the peak hours of 3 and 8 p.m. during the hot summer months. APS has full use of the 50-MW battery and is able to maximize hourly capacity until it is fully discharged. The facility is set to begin service to customers in 2021 and will be built directly adjacent to the existing APS Redhawk Power Plant in western Maricopa County.
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