Researchers at the test centers have shown that solar can still successfully generate electricity in snowy areas and other harsh environments. A dusting of snow has little impact on solar panels because the wind can easily blow it off.
Are Solar Panels OK in snow?
The longer answer of course is, yes solar panels work in winter weather, but for obvious reasons, their output is lower than during the height of summer—days are shorter and snow can temporarily reduce or shut down output. That said, solar panels are actually more efficient in colder temperatures!
Does snow need to be removed from solar panels?
Many industry experts recommend you do not attempt to remove snow from solar panels. Even with a roof rake, doing so may void your solar panel warranty, or worse, you could hurt yourself. ... If you get a substantial amount of snow, it's rare that snow will cover solar arrays for long before it melts.