Solar panels are designed to be low-maintenance, but that doesn’t mean regular maintenance should be ignored altogether.
All panels will be exposed to buildup over the course of time. If you live in Newcastle, Lake Macquarie, the Central Coast, Port Stephens, or anywhere along the NSW coast, your solar system is exposed to environmental conditions that can often cause dirt and residue to build up faster than inland areas.
Salt in the air, bird droppings, dust, pollen, and other general airborne debris can gradually accumulate on the surface of your solar panels. Over time, this layer of grime builds up and reduces the amount of sunlight reaching the solar cells, which impacts the efficiency of your system.
So the big question many homeowners ask is:
How often should solar panels actually be cleaned?
The answer depends on a few key factors, especially in coastal environments.
Why Solar Panels Get Dirty Faster in Coastal Areas
Homes located near the ocean experience environmental conditions that can cause solar panels to become dirty more quickly. While solar panels are designed to withstand outdoor conditions, they are constantly exposed to airborne contaminants that gradually accumulate on the glass surface.
Here are the most common causes of solar panel contamination in coastal NSW.
Salt Residue from Ocean Air
Living near the coast means salt particles from ocean spray are constantly present in the air.
These tiny salt particles eventually settle on roofs and solar panels, forming a thin layer that can stick to the surface. Over time, salt residue can combine with dust and pollution, creating a stubborn film that rain alone often cannot remove.
This salt buildup reduces the amount of sunlight reaching the solar cells and can slowly affect the efficiency of your system if left untreated.
Bird Droppings
Bird activity is another common cause of solar panel obstruction. Birds obviously perch on roofs during the day, and they love to sit on TV aerials as well.
Bird droppings are particularly problematic because they can completely block sunlight from reaching the cells beneath them. Even a small amount of droppings can affect energy production where solar panels operate in connected strings. Whilst modern panel technology is continually improving, in many cases, one small shaded section on a panel can reduce the output of the entire panel, which in turn can affect the whole string of panels..
Birds are also attracted to the sheltered space beneath solar panels, where they may build nests that lead to additional debris and damage. Pigeons and mynah birds are commonly found nesting underneath solar panels (possums also can be found nesting there). In such cases, we can offer a professional bird proofing solution to stop birds from making a home under your panels. Our bird proofing solutions are neat, effective and most importantly they work without affecting your system warranty.
Dust and Airborne Particles
Dust and other airborne fallout from busy roads, industrial areas, construction sites, railway lines, farmland & mining areas can easily settle on solar panels. When we experience prolonged dry weather conditions, it often comes with higher than average dust content in the air. When this dust and fallout accumulates over time, it creates a thin layer across the surface that reduces the amount of sunlight passing through to the solar cells.
While a light coating may not cause significant performance loss immediately,the consistent buildup over months can noticeably reduce system output.
It is important to understand that once this buildup starts, moisture from rain and morning dew does not help to clean the panels, in fact quite the opposite. Once a layer of grime starts to form, any form of moisture tends to be retained on the surface and therefore acts a glue for other airborne particles to adhere to.
Pollen from Surrounding Trees
Homes surrounded by trees often experience seasonal pollen buildup. Pollen particles are sticky and tend to cling to glass surfaces, including solar panels.
During peak pollen seasons, panels can develop a yellowish film that spreads across the surface. This layer can often be difficult to remove and rain alone will generally not help, in fact it tends to exacerbate the problem, and therefore your panels may require professional cleaning to fully restore performance.
Leaves and Organic Debris
Trees located near solar systems can cause leaves, twigs, and organic debris to accumulate around panels. Tree sap is another common surface contaminant that sticks to panels, and in some cases it builds up very quickly.
Leaf debris may collect along the edges of panels or become trapped underneath them. When this happens, moisture can become trapped, potentially causing long-term issues if the debris is not removed. This type of organic debris can also attract birds and pests that may nest beneath panels. We offer quality leaf proofing and bird proofing solutions to help manage these challenges.
Tree sap is often very difficult to remove, requiring extra time, and in some cases extra additives to help remove. Whilst we recommend cleaning with purified water in the majority of cases, we do have some chemical solutions specifically designed for solar panels that help us deal with very stubborn soiling challenges.
Importantly, our chemical solutions are biodegradable, and have been rigorously tested on solar panels to ensure they do not damage them, nor void the panel warranty.
Lichen
Lichen is one of the most common surface contaminants found on solar panels, especially where higher moisture levels are present.
It is commonly found on roofs, especially terracotta tiles and light-coloured Colorbond roofs, and can also grow directly on the glass surface of solar panels. Although panels appear smooth, glass is actually microscopically rough, which allows lichen to attach and grow over time. (We’ve got plenty of photos of nasty examples).
Lichen absorbs moisture from rain, dew and humidity, allowing it to survive in a wide range of conditions from full sun to shaded areas. From our experience, in coastal regions around Newcastle, Lake Macquarie and the Central Coast, we often see higher levels of lichen due to increased moisture and airborne particles.
They require a stable, undisturbed surface to attach to and they obtain nutrients from minerals, such as nitrogen, carbon, and oxygen, from rainwater, dust particles, or the air. While most people tend to think of lichen as being something found on trees, rocks, wood or even metal on buildings, at a microscopic level all glass is very rough and provides a very suitable surface for lichen to propagate.
Because lichen bonds tightly to the panel surface, it can be difficult to remove without professional cleaning. In these cases, we may use specialised biodegradable cleaning solutions designed specifically for solar panels, ensuring contaminants are removed safely without damaging the panels or affecting manufacturer warranties.
How Often Should Solar Panels Be Cleaned?
Often you will see general advice that suggests “solar panels should be cleaned every 6–12 months, or you’ll lose up to 30% of your system output”
However, this recommendation is both generic and literally impossible to validate without a proper monitoring system. Many general recommendations are based on broad assumptions rather than real-world cleaning experience.
There is no “one size fits all” approach to solar panel cleaning. What is more accurate is to say that solar panels will increasingly reduce their output the longer they are left uncleaned.. Our approach is to recommend a practical and cost effective cleaning interval that suits the installation, ensuring panels are maintained properly without unnecessary cost to the owners.
At EcoKleenSolar Newcastle, our professional solar panel cleaning process removes stubborn contaminants such as salt residue, bird droppings, pollen, and built-up grime using specialised equipment and purified water systems. Because of the quality and depth of our cleaning process, most homeowners only need their panels cleaned every 1-2 years.
This longer interval helps maintain good solar performance while reducing unnecessary maintenance costs.
Typical Cleaning Frequency With EcoKleenSolar
For most homes serviced by EcoKleenSolar Newcastle, we generally recommend somewhere between 1-2 years. A professional clean at this interval is typically sufficient to maintain optimal performance for most residential solar systems.
Where installations are subject to heavier soiling, such as mining dust, tree sap and fallout from nearby roads and industrial areas, the frequency of cleaning is higher, sometimes as often as 3-6 months in severe circumstances.
We do strongly recommend you get a clean done NO GREATER THAN 3 years apart so that an inspection of your system can be carried out at the same time as your clean to ensure there are no faults emerging, or problems that may require fixing and any that do pop up can be fixed promptly, so that your system is safe and efficient.
- Homes Located Near the Coast
Homes located closer to the ocean such as properties across Newcastle, Lake Macquarie, Port Stephens, and the Central Coast are exposed to higher levels of salt in the air. Salt particles can gradually settle on solar panels and combine with dust and moisture to form a film on the glass surface. For coastal homes, a professional solar panel clean approximately every 1-2 years is usually enough to remove salt buildup and maintain system efficiency. - Homes Surrounded by Trees
Properties surrounded by trees may experience additional buildup from pollen, leaves and organic debris, sap residue and increased bird activity. While these homes can accumulate debris more quickly, a thorough professional clean is typically sufficient when panels are properly maintained and debris is removed during cleaning. We also offer leaf proofing solutions to stop leaf build up under your panels. - Homes With High Bird Activity
Birds are naturally attracted to rooftops and may sit or nest around solar panels. Bird droppings can block sunlight and reduce energy production if left untreated. During a professional cleaning service, EcoKleen removes bird droppings and checks for signs of nesting or debris beneath the panels. If bird activity is common around your system, bird proofing solutions can also help prevent future buildup. - Roof Designs That Collect Debris
Some roof designs allow leaves or debris to collect around solar panels. During cleaning, this debris is removed to ensure water can flow freely off the panels and prevent long-term buildup. Once cleared, most systems only require professional cleaning every couple of years.
How Dirty Solar Panels Affect Energy Production
Many homeowners are surprised to learn how much dirt can affect solar panel efficiency. Solar panels rely on direct sunlight reaching the photovoltaic cells beneath the protective glass surface. When dirt accumulates on the glass, it acts as a barrier that blocks or scatters sunlight before it reaches the cells.
This can lead to several issues:
Reduced Power Generation
Even a thin layer of dirt can reduce solar output. The longer it’s left, the more it compounds and thus the amount of power production loss increases.
Studies have shown that dirty solar panels can lose between 10% and 25% of their efficiency depending on the severity of the contamination. In areas with heavy bird droppings or salt buildup, losses may be even greater.
From our experience, we have found on average that a system will increase between 5-15%, but we have also had some examples of poorly maintained systems with high amounts of surface contamination that have doubled (or in one case even tripled) their output after a clean.
Lower Energy Savings
Grid prices are increasing each year, in spite of us being told we have cheaper power. It is one reason why so many people are getting solar installed. But when your system produces less electricity, your home may rely more heavily on grid power and thus your electricity bills may be higher than expected.
Maintaining clean panels helps ensure your system is producing as much energy as possible, and that you realise as much of your savings as you can, as well as ensuring your system lasts longer.
Longer Payback Period for Solar Systems
Most homeowners install solar panels to reduce energy costs and recover their investment over time. Although it may sound like a small number, a 5-10% reduction in generation day-after-day, month-after-month all adds up. Just like interest on a loan.
If panels are not maintained properly, reduced efficiency can slow the return on investment. Systems that are poorly maintained can also suffer early degradation of the panels, which in some cases can cause irreparable damage thus reducing panel lifespan. Routine cleaning helps maintain optimal performance and protects the long-term value of the system.
Professional Solar Panel Cleaning in Newcastle
For homeowners across Newcastle, Lake Macquarie, the Central Coast, Port Stephens and the Hunter Region, EcoKleenSolar Newcastle provides specialised solar panel cleaning and maintenance services. EcoKleenSolar Newcastle focuses specifically on solar system care, offering services designed to restore and maintain solar performance.
Services include:
- Professional solar panel cleaning
- Solar system inspections
- Bird proofing for solar panels
- Leaf proofing and debris prevention
EcoKleenSolar Newcastle has built a strong reputation for quality service, backed by excellent Google reviews from local customers. Our professional cleaning methods help remove dirt, salt residue, bird droppings and other contaminants that can affect solar performance.
Request a Free Solar Panel Cleaning Quote
If your solar panels haven’t been cleaned in a while, professional cleaning may help restore their performance. EcoKleenSolar Newcastle provides solar panel cleaning services for homeowners across Newcastle, Lake Macquarie, Port Stephens, the Central Coast and the wider Hunter Region.
If you want to ensure your solar system is operating at peak efficiency, you can request a free solar panel cleaning quote today.
Frequently Asked Questions (FAQs)
- How much efficiency do dirty solar panels lose?
Dirty solar panels can lose anywhere from 5% to over 50% depending on contamination levels. On the balance of averages, the more common amount is around 10-20%. Heavy contamination such as bird droppings, salt buildup, or thick dust layers can reduce output even further. Regular cleaning helps restore optimal performance and ensures your solar system is generating the energy it was designed to produce. It also ensures your system has the best chance to last its projected lifespan. - Can I clean my solar panels myself?
While it is possible to clean solar panels yourself, it is not always recommended. Solar panel cleaning often involves working at heights, accessing steep roofs and using specialised cleaning equipment. Using incorrect tools, harsh chemicals, or abrasive materials can scratch the glass or damage the panels. It is not recommended to pressure wash solar panels, as it can cause damage to the seals around the frame and it is typically not as thorough, with residual dirt left over. Professional solar cleaners use purified water systems and specialised brushes designed specifically for solar panels to ensure safe and effective cleaning. - How long does solar panel cleaning take?
For most residential homes, professional solar panel cleaning usually takes approx 45 – 90 minutes, depending on the size of the system and roof access. Larger systems or panels with heavy contamination may take longer to clean properly.
Stay Connected With EcoKleenSolar Newcastle
If you’d like to learn more about keeping your solar panels clean and operating at peak performance, we’d love to help.
For more information about our services, pricing, and service areas, visit our main website:
https://ecokleensolarnewcastle.com.au/
If you’d like to book a service or ask a question, feel free to reach out through our contact page:
https://ecokleensolarnewcastle.com.au/#contact
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