Solar panel cleaning in Melbourne
A solar array only earns its keep if it is clean. Dust, soot, bird droppings and salt build into a film that blocks light, and a dirty panel can lose anywhere from 10% to 25% of its output, up to about 30% when the grime is heavy. We clean solar on homes, commercial roofs and high-rise buildings across Melbourne, to solar-industry method, so the panels earn what they should without voiding the warranty.
Melbourne throws a few things at a panel. Near busy roads it is soot and rubber off the traffic, which bonds hard in the sun. Near the bay it is salt, which grabs onto other grime. And everywhere it is pollen, sap and droppings that bake on in a dry spell, with mould collecting along the bottom edge of the frame where water sits.
The reason it matters beyond output is hot spots. A shaded cell, under a dropping, a leaf or a patch of mould, works against the rest of the string and heats up, sometimes to between 60 and 150°C. Left long enough, that heat can kill the panel and the whole string with it.
How we clean panels safely
Panels are glass and electronics, so the method matters as much as the effort. What we do, and what we never do:
We do | We never do |
Use purified, deionised water, so no mineral spots or white film are left behind. | Pressure wash. High pressure can break the panel-to-frame seal, let water in and void the warranty. |
Use a soft-bristle brush that will not scratch the glass. | Use abrasive tools or squeegees, which leave residue in the frosted grooves. |
Clean in the cooler part of the day, since cold water on hot glass can crack it. | Use general detergents or chemicals unless the manufacturer specifies them. |
Switch the system off before any water goes near it. | Walk on the panels, which can put invisible cracks in the cells. |
Reaching the panels
On high-rise roofs, apartment blocks and awkward homes we get to the array by rope access off certified anchors, by EWP where that suits, or with water-fed poles from a safer position. Working at height with water and live electricity is high-risk work. Our staff hold Working at Heights tickets, a Safe Work Method Statement is written for any fall risk over two metres, and we carry $20 million Public Liability Insurance.
More than a clean
A wash on its own does not tell you the array is healthy, so a full service also checks the electrical side, meaning the cabling and the rooftop isolator, the panels themselves with thermal checks for hot spots plus glass, mounts and bolts, and any new shading from trees, aerials or chimneys. You get a plain report with photos and the before-and-after output. We also fit hardwearing mesh around the panels to keep birds and rodents off the wiring, clipped on without drilling the frames, so the warranty stays intact.
What it costs
How often panels need doing depends on where they are. Near the coast, a main road or heavy tree cover they need it more often, but most systems do well on one or two cleans a year. Cleaning is usually priced per panel, roughly $12 to $18 a module, with the building height and the state of the panels moving it from there. Bundling two or more jobs, say gutters, roof or facade in the same visit, usually takes about 10% off the package.
Send us the address and the size of the system, and we will quote the clean.
If birds are nesting under the array, a clean on its own will not hold: they are back within weeks and the droppings return with them. In that case the array needs solar panel bird proofing - the cavity cleared and closed off with mesh - and the clean is done as part of that job.
Frequently asked questions
Why should you avoid DIY solar panel cleaning?
Cleaning panels yourself involves working at heights near wet surfaces and live electricity. Using improper tools like pressure washers or household detergents can scratch the glass or break panel seals, which voids manufacturer warranties. Trained technicians carry full insurance, hold working at heights certification, and use pure water systems with soft brushes to protect panel surfaces while removing buildup.
How often do Melbourne solar panels need cleaning?
Most residential and commercial solar systems require cleaning once or twice a year, or every 6–12 months, to maintain power output. Systems near busy roads with traffic pollution, under dense tree foliage, or near coastal salt air accumulate grime faster. These locations need more frequent cleaning to stop thick grime layers forming and causing panel hot spots.
How do technicians clean solar panels without damaging them?
Technicians clean solar arrays using purified, de-ionised water and soft brush equipment to lift grime without scratching the glass or leaving hard water marks. Pressure washers are never used because high pressure can break panel seals, cause internal electrical faults and void warranties. The solar system is always shut down before work begins on site.
What causes solar panel hot spots and why are they dangerous?
A hot spot forms when dirt, bird droppings or leaves shade part of a solar cell. That shaded area creates electrical resistance, driving local temperatures up to 150°C. Prolonged heat causes hot spot failure, permanently cutting power generation across the entire string of panels. In rare cases, severe hot spots create a fire hazard. Routine cleaning and thermal inspections prevent hot spot damage.
What safety standards apply to high-rise solar panel cleaning?
High-rise solar panel cleaning complies with Australian safety laws through industrial rope access techniques. Technicians hold a current Working at Heights Certificate. Any job with potential fall risks greater than two metres requires a formal Safe Work Method Statement, or SWMS, to outline safety steps. All site operations carry $20M in public liability insurance coverage.
WHY US
What you get with every job
IRATA/ARAA-certified technicians on every job, with rescue and work-positioning competencies.
Rope access means no structure on the ground, no permits for hoardings and no closed footpaths.
Public Liability cover and WorkCover for every employee - details supplied with the quote.
You get a documented scope, a Safe Work Method Statement and a photo report on completion.
Our crews have worked on ropes since 2013, with more than 100 years of combined experience across the team - and every job runs to written contract terms.
What affects the price of solar panel cleaning
Every building is quoted after we have seen it. These are the factors that move the number up or down - ask us about any of them and we will explain how they apply to your site.
| Height and access method | Rope access, elevated work platform or suspended platform - the method is chosen for the building, and it sets the crew size and setup time. |
| Surface area and condition | Heavy soiling, salt, traffic film or construction residue take longer and need specialised products. |
| Facade complexity | Recesses, angled or domed glazing, tight gaps between buildings and heritage detailing all slow the descent down. |
| Access and anchor points | Buildings with certified anchor points are quicker to set up. If there are none, temporary systems or installation are quoted separately. |
| Scheduling | Work outside trading hours, staged access or occupied tenancies affect the programme. Regular maintenance cycles are cheaper per visit than one-off jobs. |
Quotes are free and carry no obligation. Where the work is subject to a compliance requirement, the quote states which standard it is carried out to.
Suburbs we cover
We work across greater Melbourne - from CBD towers to bayside and outer-suburban sites. If your suburb is not on the list, ask anyway: our crews travel across the metropolitan area and regularly work in regional Victoria.
Aberfeldie · Airport West · Armadale · Balaclava · Balwyn · Beaumaris · Bentleigh · Bentleigh East · Blairgowrie · Brighton · Brighton East · Brunswick · Carnegie · Caroline Springs · Caulfield · Caulfield North · Caulfield South · CBD · Chadstone · Coburg · Dandenong · Daylesford · Eltham · Elwood · Essendon · Footscray · Frankston · Gardenvale · Gisborne · Glenbervie · Glen Iris · Glenroy · Greenvale · Hampton · Heidelberg · Hillside · Ivanhoe · Keilor · Kew · Lilydale · Lower Plenty · Malvern · Malvern East · Maribyrnong · Melton · Moonee Ponds · Northcote · Oakleigh · Oak Park · Officer · Ormond · Parkville · Pascoe Vale · Port Melbourne · Prahran · Preston · Reservoir · Rye · St Kilda · St Kilda East · Strathmore · Sunbury · Sunshine · Taylors Hill · Toorak · Tarneit · Wantirna · Werribee · Williamstown
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