QueenBee wrote:I have a similarly full roof as you and think it's probably worth the effort of clearing the snow as it accumulates as I could see it all sliding off at once and taking out the gutters. The last time it snowed it slide off the panels hitting the roof/gutter and then stopped sliding but it wasn't very much snow.
I think there is essentially no chance of ice taking out the gutters on our garage since the top surface of the panels is about 6" directly above the gutters.
The gutters on the house may be another matter altogether. Sometimes the snow sheds off the panels and goes all the way to the ground and other times it creeps off onto the roof as yours did. But I suspect there is an in-between mode which includes gutter removal. This is our fourth winter with the array up there and we haven't lost it yet!
I did buy a roof rake a couple of winters ago when we had three feet of snow and my house looked like a small version of the winter palace in Dr. Zhivago. But that is quite a bit of work and I only get it out if there does not appear to be warm weather coming. Somehow, the snow has managed to stay put so far, in spite of rather comfortable temperatures today. I hope it doesn't hold on until this evening.
I now consider the sliding snow to be my annual PV cleaning regime, since I imagine it does a decent job of scrubbing the surface dirt off of the panels. Come to think of it, since this is the first decent snow this winter, perhaps that dirt is what is holding the snow on the panels today!