How many million candlepower are you bringing with the fire brigade that they can electrify a firefighter by shining light on the panels? Panel output is related to the intensity of the illumination directly on the panel.
I did the experiment last week after the fire took place: 0.02A at 16V per panel (from a 235W monocrystalline panel) with a 50W light located an average of 7 feet from the panel.
Any panel not being equally illuminated begins to act as a resistor when wired in a series string of panels...
"It took 29 hours to put out the blaze". I guarantee some of that time was between sunset and sunrise, so the only source of light would have been from the responders themselves.
You want to fight a fire on a roof with panels during the daylight. Foam the panels. That's right, spray that same foamy stuff they spray on a chemical fire on the panels. I'm sure the output from the panels will drop dramatically even on a clear day! The output from my panels drops like a rock when I get a passing rain cloud. Even overcast days drops my panel output dramatically.
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