Do Solar Panels Work In The Winter And Cold Weather?

From cold weather to extremes like below-freezing weather, solar panels turn sunlight into electricity for homeowners around the world. That’s because solar panels absorb energy from the sun’s abundant light, not the sun’s heat. Solar panels are rated under “Standard Test Conditions” at 77°F (25°C), and performance typically declines as temperatures rise above that benchmark^.1

So long as sunlight is hitting a solar panel, it will generate electricity. Any diminished output during the winter months will primarily be due to heavy snow, which can cover the solar panels if it is substantial enough, and shorter daylight hours, which provide less sunlight since the sun is lower in the sky during this time of year.

Due to the factors mentioned above, solar is affected seasonally and you can expect to offset your solar energy with energy from the grid when there are less sunlight hours in the day. That being said, solar and battery storage are still a great fit for cold-weather climates with the right solar partner and system set-up.

Do solar panels work in the snow?

Yes, solar panels work in the snow. Even when covered in snow, solar panels can generate electricity.⁹ Sunlight still reaches solar panels through the snow and keeps solar cells producing energy in cold weather. Solar panels’ dark, reflective glass accelerates snow melt and slides off before it hampers performance. During solar panel installation, racks are typically tilted up at 30 to 45 degrees, which keeps snow from accumulating (to a point).¹⁰ During installation, solar panels are mounted to face the sun, which helps to melt the snow at a quicker speed. A light dusting of snow is likely to blow off or disappear rapidly, and is no cause for concern.

The good news is that even when covered with snow, solar panels can generate electricity.⁹

In fact, on cold, clear days, snow from the ground can reflect extra sunlight onto your solar panels like a mirror. This “albedo effect” enables panels to produce even more electricity in cold weather.¹¹ So now you know—rain and snow can actually be great for your solar panels! 

What is the science behind solar panels and temperature?

How do solar panels work? We’re glad you asked. When sunlight photon particles hit solar panel photovoltaic cells, also known as PV cells, the electrons in the silicon are put into motion. This creates an electric current, which is sent to your home’s electric distribution box to power your essential items² that use solar energy, including appliances, heaters, and many more necessities in the home. 

A rechargeable solar battery can help store this electricity efficiently so you can use solar energy at night, during peak electricity usage, or when the grid goes down during bouts of extreme winter weather or blackouts.

What are the benefits of home solar battery storage?

Along with storing electricity for the times when you need it most, solar battery storage has many other benefits, particularly in the winter.

Looming blackouts come with a great deal of stress and fear for the families in their path. Solar battery storage relieves that fear by reassuring homeowners that they have the necessary power should they need it in the event of a blackout or grid interruption. 

Solar panel battery storage may have financial benefits as well. Suppose homeowners qualify for rebates or grid service incentives based on their area or usage. Homeowners can be compensated by allowing the utility access to the battery’s power during critical (and high-cost) times of use, potentially saving them money in the process. Additionally, a battery allows any excess solar energy produced to be saved for future use. This allows homeowners to maximize their use of solar electricity, rather than pulling from the grid.

How do solar cells produce energy in the winter months?

Remember how electrons move around atoms? Electrons are at rest (low energy) in cooler temperatures. When these electrons are activated by increasing sunlight (high energy), a greater difference in voltage is attained by a solar panel, which creates more energy. That’s why solar cells produce electricity more efficiently when it’s colder in the winter.³

In the winter, solar panels are less likely to reach high temperatures that can reduce their efficiency.⁴  When panel temperatures exceed their ideal operating range, performance can decline. That’s why, in cooler conditions, solar panels are often able to convert sunlight into energy more efficiently—assuming strong sunlight and clear skies.

Research has demonstrated that solar panels begin losing efficiency at around 77ºF.¹ However, this diminished efficiency is balanced out thanks to more daylight hours during the spring and summer months.

Do solar panels work when it rains?

Yes, solar panels work when it rains. Much like Pacific Northwest winter climates, many places throughout the U.S., like Georgia, Texas, and Southern California, experience a cooler rainy season during the winter months. Fortunately, solar panels still function efficiently despite the rain and other inclement weather in the fall and winter.

The sun still delivers daylight to solar panels through the rain and clouds.⁵ Although solar panels are most productive in direct sunlight, they can still use diffuse or indirect sunlight (radiation) to generate energy. 

What is diffuse light?

Diffuse light is sunlight that has been scattered by particles in the atmosphere, yet it still reaches the earth.⁶ Thus, the amount of electricity generated is dependent on the density of cloud cover.⁷ Rainy days and cloud coverage cause diffuse light. But what’s the difference between diffuse light and direct light? Direct light is solar radiation traveling in a straight line from the sun down to the earth’s surface and onto the solar panels.

Though energy production decreases with increasingly dense cloud cover, solar panels continue working to a greater capacity than one may expect. Rain is actually very beneficial to solar panels; it helps wash away any dust or particles on the panels to keep them operating efficiently.⁸

How should I care for my solar panels in the winter?

Solar panels usually do not require much winter maintenance. If panels are fully covered in snow, production will temporarily stop until the snow slides off or melts; however, most systems are installed at a tilt that helps snow shed naturally.

Solar panels and cold weather states

Based on research across cold weather locations, solar is a proven economic energy solution in cold, northern climates.¹² Massachusetts, New York, and New Jersey were in the top twelve states installing solar panels in 2024 according to the Solar Energy Industries Association (SEIA).¹³Solar panels are even used in Alaska and in U.S. facilities like McMurdo Station in Antarctica.^{14, 15}

Your home doesn’t need to be in an extremely warm climate like California, Arizona, or Florida to install solar panels and to reap the many benefits. Solar panels clearly and consistently demonstrate that they can generate electricity in the snow, winter, and extremely cold climates. 

Power through winter storms with solar battery storage

In winter storms, the grid may not fare as well as solar panels. Power outages can be a frequent occurrence during the winter months, with some outages leaving families in the cold and in the dark for days.¹⁶ rising global temperatures and increasingly extreme weather events make it much more difficult to ride out the next storm without reliable backup power.^,17

Installing a grid-connected, rooftop solar panel system with battery storage can provide families with clean, renewable backup electricity so you can power through the next blackout without fear or stress about what may happen. We’ve seen that solar panels are incredibly resilient in the face of extreme weather conditions. By pairing your panels with a solar battery, you can store up your sunny day energy during stormy ones.

The time to go solar is now

Solar panels and battery storage can be a significant investment for families, but solar companies like Sunrun offer flexible financing options and solar plans for as little as $0 down. While solar panels can’t change the weather, they can help you ride it out. In return, you’ll feel more secure in your home during the winter months with an efficient solar panel installation from Sunrun.

Every winter day is a chance to power through life from the sun. Start taking control of your own energy and stay powered up through extreme weather conditions, no matter where you live in the U.S. Get in touch with one of our expert solar advisors today for more information on our solar panels. We’re happy to help!