We have an unheated building that everything is stored in. Batteries & this gear can withstand fairly cold temps. I've seen some news reports sharing some solar installations in Northern Canada (Northwest Territories and Nunavut both). It would be interesting to get updates from them on how it's been.

I grew up in Yellowknife so I understand your concerns. This CBC article is a bit older but you might be able to dig for more recent updates. http://www.cbc.ca/news/canada/north/n-w-t-solar-energy-surges-in-popularity-1.3128538