we dont really have sog's written yet but will soon as a solar farm is moving into our area.
we watched the UL material and our township chief went to the conference you spoke of with denis so he had that material to present aswell.
it spoke about water stream angles and distance while fighting pv panel fires aswell as over haul etc.
I feel the most important bit of information is that in canada there are no regulations on how these things must be installed, the UL stuff is based on california law and we are miles behind that.
for example,there may be a bare spot on the roof with no pv panels but they may have conductors mounted right to the roof decking, where California says 10 inches below the roof decking.