Do Solar Panels Work in Ontario Winters and Snow? [Yes — Here’s How]

Eric
May 5
3 min read

Will Snow Stop My Solar Panels from Working?

It’s a common concern for Ontario homeowners — “What happens to my solar panels when it snows?” Luckily, snow doesn’t mean your system stops working entirely.

Solar panels are installed at an angle, which naturally helps snow slide off when sunlight warms the surface. Most systems in Ontario are tilted 30–45 degrees to optimize solar production and promote snow shedding.
Modern solar panels have a smooth, dark surface, meaning snow melts faster compared to traditional roofing materials.
Some homeowners choose optional snow guards or heating elements, but in most cases, nature takes care of it — especially with the sun’s reflection off the snow accelerating the melt.

Bottom line: While snow may temporarily reduce production, it won’t stop your system from working — and it rarely needs manual clearing.

How Much Less Power Do You Get in Winter?

Yes, solar output is lower in winter months — but it’s not zero.

In July, your system might produce 100% of its expected capacity, while in January, it may drop to 25–40%, depending on sunlight hours and snowfall.
Ontario winters bring shorter days and a lower sun angle, which affects production — but this is all factored into your annual system design.

Good news: Your solar system is designed for yearly output — what you overproduce in summer makes up for the dip in winter.

Cloudy Days and Solar — What to Expect

Solar panels don’t need direct sunlight — they just need light.

On cloudy or overcast days, your system still generates electricity from diffused sunlight that filters through the clouds.
Output may drop to 10–30% of peak performance, but your system remains active.

Even on the greyest February day, your panels are still working — and thanks to net metering, you won’t feel the drop in your bill.

Winter Net Metering Strategy

One of the biggest advantages of solar in Ontario is net metering — and it’s especially valuable in winter.

When your system overproduces during summer, you earn bill credits with your utility provider.
In winter, when your solar production dips, those credits cover your electricity needs.

Think of it like a solar savings account: You store energy credits in sunny months and “withdraw” them in colder ones.

This is how many Ontario solar homeowners pay little to nothing on their winter energy bills.

Cold Temps = Higher Efficiency

Here’s what most people don’t know — solar panels actually perform better in cold weather.

Solar cells operate more efficiently at cooler temperatures.
In hot summer months, heat can reduce panel performance slightly.
In winter, the cool air improves electrical output per ray of light.

While you may have fewer daylight hours, your system makes the most of them thanks to this efficiency boost.

Final Thoughts: Yes, Solar Works in Ontario Winters

If you’re considering solar in Ontario, don’t let our winters hold you back.

Solar panels are built to handle snow, freezing temperatures, and cloudy skies.With net metering, cold-weather efficiency, and smart system design, you can stay energy independent all year long.

Ready to Learn More?

At Solar Canada, we design and install winter-optimized solar systems throughout Ontario. Our team handles everything — from rebates to roof assessments — so you don’t have to worry about a thing.

Book a free home estimate and see how solar can work for your home — even in snow.