Solar panels are a great investment in renewable energy, but they do require some maintenance to keep them functioning optimally. A common question in winter is: should I clean my solar panels when there is snow on them? In this blog, we discuss the do’s and don’ts of cleaning solar panels with snow, and why you should be careful.
Why is snow a problem for solar panels?
Snow can temporarily block solar panels from absorbing sunlight, drastically reducing energy output. This is especially challenging in areas with prolonged snowfall. Fortunately, solar panels are usually designed to allow snow to slide off easily thanks to their smooth surface and angled mounting. But what if the snow persists?
Should you remove snow from solar panels?
In most cases, there is no need to manually remove snow from your solar panels. Here are a few reasons why:
1. Self-cleaning ability
Once the sun shines, the snow usually melts away on its own. This is because the glass of solar panels heats up quickly, even with limited solar radiation.
2. Sloped panels
Due to the slope angle, the snow often slides down by itself, especially with thinner layers.
3. Limited yield loss
The output of solar panels in winter is lower anyway due to the shorter days and lower position of the sun. The temporary loss due to snow is often not large enough to justify risky cleaning.
When cleaning may be necessary
There are situations when snow removal can be useful, for example:
– During prolonged snowfall: When thick layers of snow remain and there is little chance of a quick thaw, energy output can be significantly reduced.
– Flat roofs: Panels on flat roofs have less slope, making snow less likely to slip.
– High energy needs: If you depend on maximum solar power in the winter (for example, in off-grid systems), you may still want to take action.
How do you clean solar panels safely?
If you decide to remove snow from your solar panels, it is crucial to do so in a safe and efficient manner. Here are some tips:
1. Use a soft brush or snow plow
Choose a telescopic brush or a scraper with a rubber edge to avoid scratching the glass. Avoid hard materials such as metal scrapers.
2. Don’t stand on the roof
Always try to remove snow from solar panels from the ground, such as with a long brush. Roofs can be slippery and falling is a big risk.
3. Do not use hot water
Hot water can cause the glass to crack because of the temperature difference. Rather, use lukewarm water if you need water.
4. Do it on a sunny day
Solar panel glass can be cold and slippery. Wait until the weather warms up slightly to make the work easier and safer.
5. Get professional help
If cleaning seems dangerous or you’re not sure how to go about it, call in a professional. They have the right equipment and experience.
Conclusion
Conclusion
Although cleaning solar panels with snow on them can be helpful in some cases, it is often not necessary. Solar panels are designed to largely clear themselves of snow. If you do decide to take action, do so safely and by the proper means. Remember: a temporary snow cover usually has only a limited impact on the total annual output of your solar panels. Let nature do its job – and enjoy your renewable energy, even in winter!
Still have questions about solar panel maintenance? Let us know!
