One of the things I was told when I bought my panels was that snow didn’t make a major impact on production. I have heard this story from a number of other folks that have purchased solar panels as well. This position is always based on this NAIT study from 2018 https://techlifetoday.ca/articles/2018/solar-shines-in-dead-of-winter-even-in-edmonton
The approach appears scientific, and I’m sure it was, however, the conclusions simply aren’t what you’ll actually experience. I can say with two winters experience you will get absolutely ZERO production with snow on a normal 4/12 pitch roof. I have experienced wet snow, dry fluffy snow and blizzards. In ALL cases my production was effectively zero until it warmed up enough to melt the snow off the panels. Anyone who tells you differently is not telling you the truth.
Below is a picture of a recent snow followed by warming. You can exactly when the snow came, and when the Chinook came that melted it off.
In this example with a poorly written finger label, we hear a loud “whump” as the panels shed their snow as they warmed up. The time of the production jump – right after the snow slid off.
So what can you do? Nothing – but don’t be disappointed that you won’t be getting any production for as long as you have snow on your panels.
Sorry NAIT, your study doesn’t stand up to the real world conditions the rest of us live in.