Fire at a PV installation

A large food storage facility with a 1.6MW rooftop PV array was destroyed by a fire that began on the roof. During the early part of the fire the inverters were collecting data from the rooftop array, and two of the three inverters were still outputting AC power. Interesting features in the collected data correspond to the progress of the fire. The experience suggests measures that would have been valuable to firefighters once the fire started.