Solar Panel Maintenance: Busting Common Myths!

Whether you are an individual, a professional, or a local authority, choosing a photovoltaic system is an excellent way to move toward energy independence, protect the planet, and save money. However, careful and regular maintenance of solar panels is essential to ensure optimal performance. And on this subject, misconceptions are hard to shake! Today, our experts share valuable information for all owners of solar power systems.

Myth #1: Rain is enough to clean solar panels.

False! Rain can certainly remove some surface dust from your panels, but it won't remove stubborn grime like bird droppings. In addition, it does not provide a true wash the way a properly handled specialized cleaning setup does. Finally, it often leaves mineral deposits on the panel surface. For a spotless result, try pure water cleaning. This demineralized water obtained by filtration ensures a streak-free finish for better solar yield.

Myth #2: Using a high-pressure washer is the best solution.

Very risky! High pressure can indeed damage the cells or the seals of your solar panels, thereby reducing both their efficiency and their lifespan.

Myth #3: You must cut the power before cleaning.

True! Even though panels are designed to withstand water, shutting down the installation minimizes any electrical risk. We strongly encourage you to take all necessary precautions. The photovoltaic circuit breaker, the inverter and the DC isolator should all be in the "off" position. Also check that there is no live voltage.

Myth #4: You can clean at any time of day.

False! It's best to avoid performing maintenance on your photovoltaic panels in full sun. First, because of the risk of thermal shock caused by the temperature difference between the panel surface and the water you use. Also, you are likely to see streaks appear. Prefer early morning or late afternoon for this task.

Myth #5: A simple dry cloth is enough.

False! A dry cloth, harmless as it may seem, can actually scratch the surface of your solar panels. In the absence of specialized equipment (telescopic pole with a rotary brush, or a cleaning robot or drone, for example), use a soft brush and clear water (preferably demineralized).

Myth #6: Cleaning and productivity are unrelated.

False! It is established that dirty photovoltaic panels can lose up to 20% in efficiency, or even more! Dust, pollen, moss, fallen leaves, sand, bird droppings, agricultural spray products, etc.: all create a barrier between sunlight and the cells of your solar panels. And it is this light that your panels convert into energy! Learn more.

Myth #7: One cleaning per year is sufficient.

It depends. Frequency depends on the environment of your installation (urban or rural, in an agricultural or industrial area, exposed to sea spray…). Any drop in output should prompt you to check the cleanliness of your solar panels. It is often recommended to carry out cleaning 2 to 4 times a year.

Myth #8: It's best to use soap or chemical products.

Only with specific cleaning products! Detergents can leave residues on the surface of your photovoltaic panels, or even damage them. Demineralized water together with a rotary brush is generally sufficient for effective cleaning. In cases of heavy soiling, it may be necessary to resort to specific cleaning products. These products are useful for fully removing mold or fungi that may have developed on the solar panels.

Myth #9: I can walk on my panels to clean them better.

Very dangerous! There is a double risk: breakage and injury. First, your panels are not designed to support such weight. You could therefore damage them and impair your solar energy production. Furthermore, to get onto a roof to clean photovoltaic panels, it is necessary to wear and install appropriate safety equipment. A fall can happen very quickly — be particularly careful!

Myth #10: You can always clean your solar panels yourself.

Not always! On a steep or very high roof, the risk of falling and getting injured is significant. It is then preferable to call a professional who is equipped and insured. Telescopic cleaning poles equipped with a dedicated brush allow the user to stay on the ground for the entire cleaning process, which guarantees their safety while ensuring proper maintenance.

Do you have other questions about cleaning your photovoltaic panels? Are you looking for a high-performance tool? Contact our team now! They will be happy to answer your questions and present our full range of products to help you find the one that best meets your needs.