> asphalt - literal rock. Asphalt is bitumen, a liquid, it is about as far removed from literal rock as possible. The reason asphalt roads break down in very c

> asphalt - literal rock. Asphalt is bitumen, a liquid, it is about as far removed from literal rock as possible. The reason asphalt roads break down in very cold weather is water which gets into tiny cracks, and which then expands when it freezes. Solar panels are encased in a fairly thick layer of glass. Just like the windows in your house, they don't break from a bit of frost. If there are cracks where water can enter, they can break for the same reasons as asphalt.