What We Know and Don’t Know About the Fire at an APS Battery Facility

GreenTech Media:  No cause has been named for the fire at an Arizona battery facility that sent four firefighters to the hospital Friday.

Peoria Fire Department spokesperson Michael Selmer described "an explosion" when the responders tried to check on the battery enclosure, raising questions about whether the batteries or some other equipment triggered that event. Lithium-ion batteries have been involved in fires before, but only a handful of times in the U.S. grid infrastructure context.

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