Snow on solar panels stops them producing power until it melts or slides off. In most of Canada, though, winter accounts for a fairly small share of a year’s solar output, so clearing snow usually matters less than people expect. Often the safest choice is to let it melt. When you do clear it, work from the ground with a soft tool. Never climb onto a snowy roof.
How much does winter really matter?
Natural Resources Canada’s photovoltaic potential data shows how solar production is spread across the year. For south-facing panels tilted at the latitude angle, December to February makes up roughly:
City
Share of yearly production in Dec–Feb
Vancouver
about 13%
Toronto
about 17%
Calgary
about 18%
Halifax
about 18%
Winnipeg
about 19%
Regina
about 19%
Ottawa
about 20%
Montréal
about 20%
These figures assume panels are clear. Snow cover reduces winter output below these shares.
In other words, even a completely snowed-in winter affects only part of your year’s production. Spring and summer do most of the work.
When is it worth clearing snow on solar panels?
Clearing can help when:
your panels are easy to reach safely from the ground, such as ground mounts or low single-storey roofs
snow is light and fluffy and comes off easily
a sunny stretch is forecast and the panels would otherwise stay buried
your panels sit on a low-slope or flat roof where snow doesn’t slide off
It’s usually better to wait when:
the panels are on a steep or high roof
the snow is icy or crusted onto the glass
warmer or sunny weather is coming. Dark panels warm in the sun, and snow often slides off tilted arrays on its own.
How to clear snow on solar panels safely
Safety comes first. Falls from ladders and roofs are a serious risk, and snow and ice make them worse. The Canadian Centre for Occupational Health and Safety’s ladder safety guidance is a good refresher.
Do:
work from the ground with a soft foam snow rake or a soft-bristled brush on an extension pole
pull snow gently down the slope, away from you
clear only what comes off easily; leave a thin layer to melt
watch for snow sliding off the roof and falling on you
Don’t:
climb onto the roof or use a ladder in icy conditions
use metal shovels, ice picks, scrapers or hard-edged tools, which can scratch the glass or damage the frame
pour hot water on the panels, which can stress the glass and refreeze as ice
apply sprays, coatings or heating products without checking your panel warranty
Hiring a professional
If your panels are on a steep or high roof, or you’re not comfortable working near a roofline, hire a professional with proper fall protection and insurance. Ask your installer whether they offer winter service, or can recommend someone. Check what your warranty says about cleaning.
Designing a system for snow on solar panels
If you’re planning a new system, your installer can reduce snow problems from the start:
Electronics: with microinverters or optimizers, a partly covered array can still produce from the uncovered panels.
Check your system after storms
Use your monitoring app or inverter display to see whether production has resumed after a storm. If output stays low long after the snow has gone, contact your installer. It may be a fault rather than snow.
The bottom line
Snow on solar panels is normal in Canada, and it costs less production than most people think, because winter is a small share of the year. Clear it only when you can do it safely from the ground with a soft tool; otherwise, let the sun do the work. For year-round output estimates, see how much a 5 kW solar system produces.
Frequently asked questions
Do solar panels work in winter in Canada?
Yes. Panels produce power in cold, sunny weather, but shorter days and snow cover mean winter production is much lower than summer. NRCan’s data shows December to February is roughly 13–20% of yearly output in major cities, with clear panels.
Should I remove snow from my solar panels?
Only if you can do it safely from the ground with a soft snow rake or brush. On steep or high roofs, it’s usually best to let the snow melt or slide off.
Can snow damage solar panels?
Panels and racking are designed for snow loads, and your roof should be checked for them during permitting. Damage is more likely from hard tools or scraping than from the snow itself.
