As more Australians embrace solar energy, maintaining the efficiency of solar panels has become essential. Dirty panels—clogged with dust, bird droppings, leaves, or even pollution—can lose up to 25% of their energy output. Routine cleaning helps you make the most of your solar energy investment. Cleaning solar panels involves removing debris, dirt, and grime from the panel surfaces without damaging the cells or frames. It’s not about scrubbing hard—it’s about doing it gently and effectively. Whether you choose to clean them yourself or hire a professional depends on accessibility, your confidence with heights, and your time.
While DIY cleaning may seem cheaper upfront, improper techniques can damage your panels or void warranties. On the other hand, professional services may cost more but bring expertise and safety. Finding the right balance is essential for maximising long-term savings
DIY Solar Panel Cleaning
When to Clean Solar Panels
- Seasonal Considerations
In Australia, the best times to cleaning solar panels are at the end of summer (due to dust and bushfire ash build-up) and after autumn (to remove fallen leaves). Spring can also be a good time, especially if there’s been less rainfall. - Environmental Factors
If you live near the coast (salt), in a dusty region, or close to trees (sap and leaves), more frequent cleaning may be needed—perhaps every 3 to 6 months. Suburban areas with low pollution might only need a clean once or twice a year.
Tools and Materials Needed
- Soft-Bristle Brush
Opt for a long-handled soft-bristle brush or a squeegee with a gentle, non-abrasive sponge to carefully remove dirt and grime. - Mild Detergent or Vinegar Solution
Avoid harsh chemicals. A mix of water and a small amount of biodegradable dish soap or white vinegar is effective and safe. - Hose with Fresh Water
Use a garden hose with a gentle spray setting to rinse off dirt and soap residue. Never use high-pressure cleaners. - Ladder or Safety Equipment
If your panels are on a pitched roof, ensure you have a sturdy ladder and proper safety harnesses. Never attempt cleaning during wet or windy weather.
Common Mistakes to Avoid
- Using abrasive sponges or chemicals
- Cleaning during the heat of the day (can cause rapid drying and streaks)
- Walking directly on panels (can crack them)
- Skipping safety precautions
Professional Solar Panel Cleaning
When to Consider Professional Services
- High-Rise Installations
If your solar panels are on multi-storey homes or hard-to-access roofs, it’s safest to call in experts with the right gear and insurance. - Extensive Dirt Build-Up
If your panels haven’t been cleaned in years or are heavily soiled, professionals will have the tools and experience to handle stubborn residue without causing damage. - Lack of Time or Knowledge
Busy schedules or lack of confidence with heights or tools are valid reasons to outsource the task.
How to Choose a Professional Service
- Credentials and Experience
Look for accredited companies familiar with solar systems. Ask about insurance and safety protocols. - Customer Reviews and Testimonials
Check online reviews or ask your neighbours or solar installer for recommendations. - Pricing and Services Offered
Compare quotes and check if services include a system inspection (checking for cracks, wiring issues, or inverter faults), which can add value.
FAQs on Solar Panel Maintenance
Does cleaning solar panels increase their efficiency?
Yes. Regular cleaning can improve efficiency by 10–25%, depending on the level of dirt and environmental conditions.
Is it worth paying to have solar panels cleaned?
For hard-to-reach or heavily soiled systems, yes. Professional cleaning helps extend the system’s lifespan and protects your investment.
