Source: APNews | June 23, 2019

This photo taken in May 2017 and provided by Arizona Public Service shows the Festival Ranch 2 megawatt battery owned by Arizona Public Service near Buckeye, Ariz. An identical battery caught fire in April 2019 in a massive blaze that sent eight firefighters and a police officer to the hospital, highlighting the challenges and risks that can arise as utilities prepare for the exponential growth expected for massive batteries to store energy. (Arizona Public Service via AP)

Arizona’s largest electric company installed massive batteries near neighborhoods with a large number of solar panels, hoping to capture some of the energy from the afternoon sun to use after dark.

Arizona Public Service has been an early adopter of battery storage technology seen as critical for the wider deployment of renewable energy and for a more resilient power grid.

But an April fire and explosion at a massive battery west of Phoenix that sent eight firefighters and a police officer to the hospital highlighted the challenges and risks that can arise as utilities prepare for the exponential growth of the technology.

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