First, it’s important to note that panels function on light and not heat. So even in the cold of winter, panels can produce quite well. In fact, most panels perform better in cold temperatures than in extreme heat.

So that also means that as long as some source of light is present, panels will produce some energy no matter what the weather. Yes, of course production is decreased when it is cloudy, raining, or snowing because the direct sunlight is not as great. But if there’s some light, there will still be some energy. In addition, panels such as SunPower’s are designed to perform well even in low light conditions.

If a panel is covered with a blanket of snow, it will produce next to no energy, but the good news is they generate just enough heat and are tilted in such a way that the snow does not stick like it does to other surfaces and it will melt more quickly to get back to energy production.

Yes, the long sunny summer days are ideal for solar installations. Your system will produce the most in June, July, and August, and the least in November, December and January. But the good news is, whenever there is light, it will still produce.

A Sunpower Elite Dealer