How to Clean Solar Panels, Your Complete Guide!

The best solution for cleaning your solar panels is a combination of water and a mild soap or a cleaning solution specifically designed for photovoltaic panels.

Solar panels rely on direct sunlight for optimal functionality. The more sunlight they receive, the more energy they generate. Therefore, it’s understandable to be concerned about the impact of dirty panels on your energy output and profits.

Cleaning your solar panels is crucial to maintaining high efficiency and maximising energy production. We’ll provide useful tips on cleaning and maintenance that require minimal effort, ensuring your solar installation performs efficiently throughout its lifetime.

What Causes Dirty Solar Panels

Over time, solar panels accumulate dirt from airborne dust and pollutants in the atmosphere. This buildup can be accelerated near industrial complexes or construction sites where dust is more prevalent. In agricultural settings, solar installations may also gather residues like fertilisers and nitrogen-rich particles, which can gradually degrade the components of the solar panels.

Additionally, bird droppings pose a significant challenge for solar panel efficiency. They not only create shade that reduces energy production but can also lead to localised heating issues known as hot spots on the panels. Regular maintenance and cleaning are essential to mitigate these factors and ensure optimal performance and longevity of solar installations.

How Much Can Dirty Solar Panels Impact Energy Production

The impact of cleaning solar panels varies depending on their level of dirtiness. For small residential systems, the potential improvement in energy production from cleaning may only translate to modest savings on your energy bill—often just tens of dollars. In such cases, relying on rainfall to naturally clean solar panels installed on angled roofs might suffice.

However, the scenario changes significantly for commercial and utility-scale solar farms. A 5-10% increase in energy production can make a substantial difference in these larger installations. This boost can significantly enhance profitability and operational efficiency. Hence, it becomes worthwhile to consider implementing a regular cleaning schedule for PV panels or even hiring professional cleaners to ensure consistent optimal performance.

When Should You Clean Your Solar Panels?

It’s advisable to clean your solar panels when their dirtiness starts affecting energy production noticeably.

Advanced monitoring systems equipped with microinverters and power optimisers allow for precise tracking of panel-level outputs. This technology enables you to identify individual panels that are dirty or monitor overall system performance if energy production drops below expected levels.

Flat-installed solar modules are less likely to benefit from self-cleaning with rainwater, as water tends to pool on the panels and leave behind dirt residue.

Dust accumulation is often concentrated at the edges of the module frame following rain, further necessitating periodic cleaning to maintain optimal efficiency.

According to Google, cleaning flat solar panels installed on carports can increase energy production by as much as 36%, highlighting the significant impact of regular maintenance on solar panel performance.

What Are the Best Ways to Clean Solar Panels

Whether you’re an experienced solar panel cleaner or a homeowner with a residential solar system, having the right tools is crucial for efficient and safe cleaning.

Using a water hose from ground level is often sufficient for most cleaning needs. Rinsing rooftop solar panels from the ground with a hose is generally the safest method, allowing the water to mimic rain and leverage gravity to remove dirt.

Dealing with stubborn contaminants like bird droppings requires patience. Softening them with water and then making multiple passes with the hose can effectively remove them without damaging the panels.

For oily smudges or tougher stains, safely climbing onto the roof enables the use of isopropyl alcohol. This substance effectively cleans without leaving marks, unlike detergents or soap, which can leave residues that attract more dirt over time.

It’s crucial to never stand directly on the solar panels as this can risk microcracks that diminish energy output. Instead, use soft brushes specifically designed for solar panel cleaning along with water to scrub away dirt. Avoid using abrasive materials like steel brushes, as they can scratch the solar glass and reduce solar production.

After cleaning, finishing with a squeegee ensures a streak-free surface, similar to cleaning windows, preventing water streaks that could shade the solar panels and reduce efficiency. This comprehensive approach ensures your solar panels remain clean and efficient for optimal energy production.

Solar Panel FAQs

Final Say on How to Clean Solar Panels

Regular cleaning and maintenance of solar panels are essential to ensure they operate at peak efficiency and continue to generate maximum energy output. By keeping panels free from dust, debris, and other contaminants, you not only enhance their performance but also protect your investment in renewable energy.

Whether you choose to clean them yourself using gentle methods or opt for professional services, maintaining clean solar panels will contribute to their longevity and contribute positively to your energy savings. Stay informed about best practices and adapt cleaning frequency based on local conditions to optimise the benefits of your solar energy system for years to come.

Cleanco Commercial Cleaning are your experts when it comes to commercial cleaning Brisbane. We enjoy not only supplying you with the best tips on solar panel cleaning, but also cleaning tips in general. If you require additional information about cleaning methods, feel free to email us or browse through our plethora of blog posts.