How to Keep Your Solar Panels Snow-Free for Maximum Efficiency?

One of the popular myths that you may encounter is that solar panels don’t work during winter or in cold climates. It may be true to a certain extent, but the fact is solar panels produce more energy with the same amount of sunlight during cold weather.

Solar panels are a great source of sustainable energy. Still, the accumulation of snow during winter can be a significant drawback, as it may reduce the efficiency of solar panels by limiting the contact of direct sunlight. 

If you are wondering how to keep snow off your solar panels, don’t worry, in this blog, we are going to explore the various ways by which you can remove the snow buildup from your solar panels. Let’s get started. 

Why should I remove snow from solar panels?

We all have this question running through our minds, “Will the weight of heavy snow hurt the panels?” Well, all solar panels are designed to withstand a variety of weather conditions, and most panels have a pressure rate, which measures the amount of pressure a solar panel can possibly withstand. 

Most panels are manufactured with a pressure rate that could withstand the load of 5,000 or more Pascals(Pa), which is two to four feet of snow, depending on its density. However, the accumulation of snow could block the contact of sunlight, which may reduce or stop energy production. Even a light dusting of snow can decrease energy production by 30% or more. As snow depth increases, so does energy loss.

At around 2-3 inches of snow, solar panel output can drop by up to 70-80%. Anything over 3 inches can essentially cut power generation to zero. The snow’s density also affects efficiency loss.

Light, fluffy snow is less impactful than heavier, wetter snow that compact and adheres to the panels. Large snow drifts are especially problematic, completely burying panels under piles of snow. Until the snow is cleared, frozen-over panels are rendered entirely nonfunctional. This can mean days or weeks of greatly reduced solar energy capture during peak winter weather.

How to keep snow off your solar panels?

There are several methods for keeping snow off solar panels. They can be broadly categorized into preventative measures and removal techniques.

1. Tilt the solar panels at a steeper angle

The ideal angle is between 45 and 60 degrees, which allows snow to slide off naturally. This helps to minimize snow accumulation on the panels, thereby improving their efficiency in generating solar power. However, it is important to find the optimal angle to avoid shading other panels on your roof. Shading can significantly reduce the power output of solar panels. You may need to consult with a solar installer to determine the best angle for your roof and location.

2. Apply hydrophobic or anti-stick sprays

These sprays create a slippery surface that repels snow accumulation. This can be a good option for preventing snow buildup on your panels, especially in areas with light snowfall. Be sure to use coatings designed specifically for solar panels. These coatings are typically applied to the surface of the panels and can last for several years.

Focus on spraying the edges and frames where snow accumulates first. Snow tends to accumulate on the edges and frames of solar panels first, as these areas are typically cooler than the center of the panels. By spraying these areas first, you can help to prevent snow from accumulating on the entire surface of the panels. You may need to reapply the spray throughout the winter, as the coating can degrade over time and with exposure to the elements.

3. Brush off light snow regularly

Use a soft brush or roof rake to remove light snow before it compacts and becomes heavier. Brushing off light snow is a quick and easy way to prevent it from accumulating on your panels. It is important to use a soft brush that will not scratch the surface of the panels. A roof rake can also be used to remove snow from the panels, but be careful not to apply too much pressure, as this could damage the panels.

4. Remove heavy snow carefully

If you must remove heavy snow from your solar panels, use a plastic scraper or squeegee. It is important to avoid using metal tools or applying too much pressure, as this could damage the panels.  If the snow is too heavy to remove safely with a plastic scraper or squeegee, it is best to leave it alone and let it melt naturally.

5. Install solar panel heaters (for very heavy snowfalls)

Solar panel heaters are embedded heating elements that melt snow accumulation. This is a good option for areas with very heavy snowfalls. However, they can be expensive to install and operate.

What should you not do? The dont’s 

While maintaining peak efficiency for your solar panels is crucial year-round, winter cleaning requires a different approach. Brushing off the snow might seem like the obvious solution, but there are several reasons why it’s best to resist the urge. Here’s why you should take a step back and let nature take its course:

• Patience is key – Winter sunshine is surprisingly effective at melting snow on your panels. While it may take a day or two, waiting is the safest and most efficient option.
• Safety first – Icy conditions and slippery roofs pose a significant risk. Don’t attempt to climb onto your roof to remove the snow.
• Beware of the falling snowball effect – Imagine a heavy chunk of ice (potentially weighing 100 pounds!) falling on you! Let gravity take care of snow removal from a safe distance.
• Prevention is better than cure – Improper cleaning techniques can scratch your panels’ delicate surfaces. Resist the urge to scrape off ice build-up, as it can cause permanent damage.
• Seek professional help – If heavy snow accumulation persists or you’re uncomfortable with DIY solutions, consider consulting a professional solar panel cleaning service.

What should you do about the snow on your panels? The do’s

While keeping your solar panels clean is essential for optimal performance, winter will throw you a curveball. Removing snow yourself might seem like the right answer, but there are hidden dangers and potential consequences to consider. Here’s why it’s best to leave snow removal to the professionals:

• Warranty woes – Many solar panel warranties become void if the panels are damaged during cleaning. Walking on your roof or using improper techniques could invalidate your warranty, leaving you with a hefty repair bill.
• Safety first – Winter rooftops are a recipe for disaster. Icy conditions and slippery surfaces significantly increase the risk of falls. Leave the climbing to trained professionals equipped with proper safety gear.
• Hidden hazards – Snow removal can be more than just brushing off snowflakes. Heavy snow accumulation can mask underlying issues, like ice buildup or damaged panels. Professionals can identify and address these concerns during the cleaning process.
• DIY disasters – Improper cleaning techniques can scratch your panels’ delicate surfaces, permanently reducing their efficiency. Professionals use specialized tools and cleaning solutions to ensure safe and effective cleaning.
• Peace of mind – Hiring a professional removes the stress and risk associated with DIY snow removal. Let them handle the work while you enjoy the benefits of clean, snow-free solar panels.

Keep the winter solar power shining bright

Solar panels are a great investment, but it’s important to take care of them, especially in the winter. Snow and ice can block sunlight and reduce the efficiency of your solar panels. However, it’s important to be careful when removing snow from solar panels, as improper cleaning can damage them.

If you have a lot of snow on your solar panels, it’s best to hire a professional snow removal company. They have the experience and equipment to remove snow safely and efficiently.