Dirty solar panels can lose up to 30% of their energy output. Professional cleaning with purified water restores full efficiency — and when we're already on your roof for a roof clean, solar panel cleaning is included free.
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Solar panels are one of the most cost-effective home upgrades available in Queensland — but their efficiency is directly tied to how clean they are. Dust, bird droppings, pollen, lichen and the general grime that accumulates on any outdoor surface in SEQ's climate can reduce solar panel output by 15 to 30%, depending on the level of soiling and the time since the last clean. Unlike most surfaces around your home, solar panels require specific cleaning care — abrasive materials, harsh chemicals or hard water can permanently scratch the glass surface and leave mineral deposits that actually increase soiling over time. The correct method is purified water cleaning using soft brushes and deionised water, which leaves no residue and restores the glass to its full light-transmitting condition.
Research from the solar industry consistently shows that dirty panels lose between 15 and 30% of their energy output depending on the level of soiling. In Queensland's dusty, polluted and bird-active environment, panels can lose significant efficiency within 6 to 12 months of installation without cleaning. At current electricity prices, that lost efficiency has real dollar value.
Bird droppings cause disproportionate efficiency loss compared to general dust because they create a concentrated dark spot on the panel surface that blocks light to an entire cell section — not just the area directly beneath the dropping. A small concentrated deposit can affect an entire cell string's output. This is why bird droppings should be addressed promptly rather than waiting for a scheduled clean.
Abrasive sponges or brushes scratch the anti-reflective coating on solar panel glass, permanently reducing light transmission. Tap water leaves mineral deposits as it evaporates. The correct method uses deionised or purified water with a soft brush — this removes all contamination without leaving any residue and is safe for panel coatings and edge seals.
When we're already on your roof for a roof clean, solar panel cleaning is included free in our Roof Clean package (up to 20 panels). It's a natural add-on — the access is already set up and the incremental time is minimal. Maximum value from a single visit.
Most solar panel manufacturers recommend cleaning every 6 to 12 months. Queensland's climate — dust, pollen, bird activity and storm deposits — typically warrants annual cleaning at minimum. If you notice a significant drop in output between readings, soiling may be the cause.
It's possible but comes with risks — working on a roof without appropriate safety equipment is dangerous, and using the wrong cleaning materials can permanently scratch panel glass. Professional cleaning is significantly safer and ensures the right method is used.
Prolonged soiling, particularly bird droppings that contain acidic compounds, can in some cases etch panel glass over extended periods. Regular cleaning prevents this and protects the panel investment.
Yes — solar panel cleaning for up to 20 panels is included free with our Roof Clean package. Combined with the free gutter clean also included, it's the highest-value package we offer.
Serving Redlands and all of South East Queensland. We reply within 2 hours, Mon–Sat.
0412 291 614