How often should you clean your solar panels?

Keeping solar panels clean is essential for maintaining efficiency and maximising energy output. Over time, dirt, dust, bird droppings, and other debris can accumulate on the surface, reducing the amount of sunlight reaching the photovoltaic cells. This buildup can lead to a significant drop in performance, affecting the return on your solar investment.

Factors that affect cleaning frequency

How often you should clean your solar panels depends on several factors, including location, weather conditions, and environmental exposure. If your panels are in an area with high levels of dust, pollution, or bird activity, they may require more frequent cleaning. Similarly, panels installed at a lower tilt angle are more likely to accumulate dirt and need attention sooner than those positioned at steeper angles where rain can naturally wash debris away.

In commercial and industrial settings, the need for regular cleaning is even greater. Large-scale systems often experience higher levels of soiling, which can result in significant energy losses. Regular maintenance ensures optimal performance and prevents long-term damage. At Cleantek, we specialise in commercial solar panel cleaning services—learn more here.

Signs that your solar panels need cleaning

While a scheduled maintenance plan is ideal, there are some telltale signs that your solar panels need cleaning sooner rather than later. A noticeable drop in energy production is one of the most obvious indicators. If you’re seeing lower-than-expected performance from your system, accumulated dirt could be the culprit.

Visual inspection can also help. If you notice a layer of dust, bird droppings, or other debris on the panels, it’s time for a clean. Some areas may also experience seasonal changes that affect panel cleanliness, such as pollen buildup in spring or increased bird activity during nesting seasons.

How often should solar panels be cleaned?

For most residential solar systems, cleaning every twelve months is sufficient to maintain optimal performance. However, if your home is in a high-dust area, near construction sites, or under trees that drop leaves and sap, more frequent cleaning may be necessary.

Commercial and industrial solar panels in most cases require cleaning at least twice a year, if not more frequently depending on size, locations & other variables. Businesses relying on solar energy for cost savings and operational efficiency should invest in regular professional cleaning to prevent energy losses and maintain system reliability.

Professional cleaning vs DIY

While some homeowners opt to clean their solar panels themselves, professional cleaning offers several advantages. Using the right equipment and techniques ensures a thorough clean without causing microcracks or damage to the panels. We use advanced solar cleaning technology to safely and effectively remove dirt, ensuring maximum energy absorption without the risks of improper handling.

Professional services are particularly important for commercial systems, where large panel arrays require specialised equipment to clean efficiently and safely. Hiring experts also ensures compliance with manufacturer warranties, as some warranties require professional maintenance to remain valid.

Get expert solar panel cleaning today

Keeping your solar panels clean is one of the simplest ways to improve efficiency and protect your investment. Whether you need a one-off clean or a regular maintenance plan, Cleantek Group has the expertise and technology to get the job done right. Contact us today to schedule a professional cleaning service and ensure your solar system continues to perform at its best.

Get in touch to book a cleaning service or discuss a customised maintenance plan for your solar setup.