Solar Panel Cleaning
Solar Panel Cleaning
Keep your solar panels performing at their best with professional solar panel cleaning from Lilypad Exterior Cleaning. Over time, solar panels naturally become covered in dirt, traffic film, bird droppings, algae, moss, and lichen growth. This buildup blocks sunlight from reaching the photovoltaic cells efficiently, reducing overall energy generation and system performance.
Studies have shown that heavily soiled solar panels can lose anywhere from 10% to 25% of their efficiency depending on the level of contamination. In severe cases where thick lichen, moss, or organic staining is present, the losses can be even greater.
Why Regular Solar Panel Cleaning Is Important
Saves you money and keeps solar panels maintained
Many homeowners assume rainfall will keep their solar panels clean, but this is rarely the case. Rainwater often leaves behind dirt deposits and can actually encourage algae and lichen growth over time, particularly on lower-pitched roofs or shaded areas.
One of the biggest long-term issues we see is lichen growth. Lichen is not simply surface dirt — it physically bonds to the glass surface and can begin damaging the panel’s anti-reflective (AR) coating if left untreated for extended periods. Once the AR coating becomes permanently damaged, it can affect light transmission and reduce the performance and lifespan of the panels.
This is why ongoing yearly maintenance is so important. Annual professional cleaning helps prevent lichen from taking hold in the first place, protecting both the appearance and long-term efficiency of your solar investment.
How Often Should Solar Panels Be Cleaned?
For most residential properties, we recommend professional solar panel cleaning every 12 months. However, some systems may benefit from more frequent maintenance depending on their location and surrounding environment, including:
- Properties near busy roads
- Coastal locations
- Areas with overhanging trees
- Agricultural or farming environments
- Roofs prone to moss, algae, or lichen growth
Routine maintenance prevents heavy contamination from building up and avoids the need for more intensive restorative cleaning later on.
Safe & Professional Cleaning Methods
At Lilypad Exterior Cleaning, we use specialist cleaning methods specifically designed for solar panels. Protecting both your property and your solar system is our priority on every project.
Our methods include:
- Pure water cleaning systems for a spotless finish
- Solar panel-approved cleaning chemicals where necessary
- Soft washing techniques to safely remove organic growth
- Water fed poles for safe access from ground level where possible
- Mobile scaffold towers and professional access equipment for higher or difficult-to-reach installations
We never use harsh pressure washing methods that could damage seals, coatings, or electrical components. Every clean is carried out using safe working practices and professional-grade equipment.
Restore Efficiency & Protect Your Investment
Solar panels are a significant investment, and regular maintenance helps ensure you continue getting the maximum return from your system. Whether your panels are lightly soiled or heavily covered in algae and lichen, we can safely restore them to a much cleaner condition and help improve overall performance.If your solar panels are looking dirty or haven’t been professionally cleaned in years, contact Lilypad Exterior Cleaning today for expert solar panel cleaning services.
Lilypad Exterior Cleaning – Solar Panel Cleaning FAQs
Yes, they do. Over time, solar panels collect dirt, dust, bird droppings, pollen, and traffic pollution. This build-up blocks sunlight and can significantly reduce how much energy your panels generate. Regular cleaning helps keep them working at their best.
Quite a lot. Dirty panels can lose anywhere from 10–25% efficiency, and sometimes more if they’re heavily soiled. Cleaning restores maximum light exposure, meaning better energy output and better return on your investment.
You can, but it’s not recommended. Solar panels are often awkward to reach, and using the wrong equipment, detergents, or too much pressure can cause damage. There’s also the safety risk of working at height. Professional cleaning ensures the job is done safely and correctly.
For most domestic properties, we recommend once or twice a year. If your home is near trees, farmland, busy roads, or the coast, more frequent cleaning may be beneficial due to higher levels of dirt and debris.
At Lilypad Exterior Cleaning, we use specialist pure water systems and soft-bristle equipment designed specifically for solar panels. No harsh chemicals, no pressure damage — just safe, effective cleaning that protects your panels and improves performance.
