[KennyBlanken]

Winter is not an issue for solar because solar panel efficiency is better when the panel is cooler. A panel blazing away in Florida is actually losing quite a bit of efficiency because of how hot the panel is; much farther north even with less light, the panels can produce more.

[SketchySeaBeast]

But it is an issue when Calgary only sees 8 hours of daylight in the deepest depths of winter.