Solar Panel Cleaning
Gentle, pure-water solar panel cleaning to maximize energy output by removing dust, bird droppings, and pollution.
Solar panel cleaning is the gentle washing of photovoltaic panels with deionised water and soft brushes to remove dust, bird droppings, salt and pollen — the build-up that quietly cuts solar output by up to 25% over 12–18 months. WSI Cleaning services residential and commercial solar across Brisbane and the Sunshine Coast. Most homes recover 10–20% of lost output after a single clean, with the highest gains on coastal, dust-zone and bird-perch-adjacent installs. Quoted in 24 hours, panels untouched by hard water or harsh chemistry.
Right match for your property.
For homeowners and businesses wanting to maintain peak efficiency of their solar energy system.
Built on 12 years of surface care.
Chemical-free pure water systems, scratch-free brushes, and safe roof access equipment.
Why deionised water and not regular tap water?
Deionised water has had its mineral content filtered out, so it dries with no spotting on glass — which is critical on solar panels, where mineral spots reduce light transmission and recreate the loss of output you just paid to remove. Tap water dries with calcium and magnesium spots that act like shade. We use a deionised-water-fed pole system with soft brushes — no detergent on the panel face, no high pressure, no abrasive contact. Manufacturer warranties are preserved.
How we approach a solar panel cleaning job.
- 01
Panel inspection
We check panel condition, inverter status (panels switched off where the system requires it) and roof access before climbing.
- 02
Soft brush wash
Each panel is washed with a soft brush on a deionised-water pole — no pressure, no abrasive contact.
- 03
Spot-free rinse
Final rinse with deionised water leaves no mineral spots and no shading once dry.
- 04
Frame and edge clean
Frame edges and gaps where dirt collects are detailed.
- 05
Output check (optional)
We can note pre- and post-clean inverter output if your system has a public read-out — useful for measuring the gain.
What this service covers.
Standard PV glass
DI-water + soft brush. No detergent, no pressure.
Frosted / textured PV
Same DI-water process, longer dwell to lift dust from texture.
Tilted ground-mount arrays
Easier access, faster clean — and easier to spot-check for damage.
Commercial roof arrays
Same chemistry; access often via EWP for safe walk-around.
Solar Panel Cleaning questions, answered.
How often should I clean my solar panels?
Once a year for most South East Queensland homes. Coastal properties (within 2 km of the beach), homes near agricultural land and installs near bird-roosting trees should be cleaned every 6 months — bird droppings are the single biggest output-killer because they create permanent shaded spots.
Will cleaning my panels void the warranty?
Not when it's done correctly. Most manufacturers explicitly require periodic cleaning; warranty issues come from harsh chemicals, high pressure or scratching the surface. Our deionised-water and soft-brush process is what the manufacturer documentation typically recommends.
How much output will I gain?
Most homes recover 10–20% of lost output after the first clean. Coastal and dust-zone installs sometimes recover more (up to the 25% maximum). Once you're on a regular cycle, the gain stays steady at 5–10% versus uncleaned.
Can you clean panels safely while they're generating?
Yes — water on glass doesn't change the electrics, and we don't lift connectors. For systems where the manufacturer requires shutdown during cleaning, we follow that and switch the inverter off via the AC isolator before starting.
Do you walk on the panels?
Never. We work the panels from the rooftop alongside, never standing on them. Walking on PV creates micro-cracks that fail months later.
Solar Panel Cleaning in your city.
A fixed price, no hidden fees.
Quick and simple. No pushy follow-ups, no hidden fees, no phone call unless you ask for one.