Arizona to receive its largest battery storage solution yet


The Arizona Public Service (APS) and photovoltaic manufacturer First Solar are bringing a first-of-its-kind 50MW solar-fueled battery to the desert to provide clean power to Arizonans in summer.

This project will make Arizona home to one of the largest battery storage systems in the country.

The innovative design demonstrates how 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 65MW solar field to charge the battery.

APS has signed a 15 year power purchase agreement with First Solar, enabling them to use the stored power when energy use is at its peak.

This project adds to the more than one million solar panels and three grid-scale batteries currently on APS’ system.

“Partnering with an Arizona company such as First Solar to pair solar power with advanced battery storage is good for our customers and continues our state’s national leadership in clean energy innovation,” said Don Brandt, Chairman, CEO of APS.

According to Mark Widmar, CEO at First Solar: “Through this innovative project we are excited to partner with APS to demonstrate the capabilities of solar coupled with large-scale battery storage. Together, these technologies highlight the significant role for solar in providing reliable, cost effective energy.”

The facility will be operational by 2021 and will be built directly adjacent to the existing APS Redhawk Power Plant in western Maricopa County.

Over the next 15 years, APS plans to adopt more than 500MW of additional battery storage.