Seams like a connector like this
http://www.andersonpower.com/products/multipole-sb.html mounted on the side of each panel would isolate the panel from the house. Equipped with a handle (They make one for that connector) that could be opened with a Pike pole (a firefighters tool use to pull ceilings) the fire fighter could operate from a distance and disconnect all the panels from the system. Good for residential aps but may be impracticable for commercial aps. I like the carport mounted panels used on some commercial locations. Gets them off the roof, easy to isolate and does not interfere with firefighting or re-roofing.
