Snow only rolls off after a lite dusting.
If there's a foot of snow on the panels they don't catch any sun, don't get warm, and it doesn't melt off.
More than about 3 inches needs to be manually cleared.
If there's a foot of snow on the panels they don't catch any sun, don't get warm, and it doesn't melt off.
More than about 3 inches needs to be manually cleared.
Often exceeding the energy gained in the winter.