Dec. 26, 2013 08:54:00
Dec. 27, 2013 14:50:00
The bit about ice damming is interesting and worth keeping a watch for.
Otherwise, I get the impression that a few cm of snow on the panels could effectively clean them if you can start an avalanche! Once you get a small clear patch the heat generated by pv production will eventually melt the rest of the snow and cause it slide down the panels, cleaning them quite well. I brush snow off my panels with a soft broom on the end of an extending pole.
URN 215 North Yorkshire 3.96 kWp, S facing, 40 deg tilt, minor shading