Investing in solar is one of the smartest moves for a Perth homeowner, but maintenance is a double-edged sword. While keeping panels clean can boost efficiency by up to 30%, the wrong methods can lead to permanent damage.
Using Perth’s "Hard" Tap Water
Perth’s water is heavy in calcium and magnesium. When it evaporates on hot glass, it leaves calcium carbonate scale—white spots that are nearly impossible to remove without chemicals.
Cleaning in the Midday Heat
Solar panels reach over 70°C in the WA summer. Cold water on hot glass causes thermal shock, which can shatter the glass or cause invisible micro-cracks.
Abrasive Brushes & Steel Wool
Scrubbing with stiff brooms or sponges destroys the anti-reflective (AR) coating. Once this coating is scratched, your energy production drops permanently.
High-Pressure Washers
Forceful water jets can blast past the silicon seals of the frame. This leads to water ingress, internal corrosion, and total electrical failure.
Thinking Detergent is "Cleaning"
Soaps leave a sticky residue that acts as a magnet for dust. Your panels will look clean for a day, then get twice as dirty the following week.
Is DIY worth the risk?
If your roof is multi-storey, steeply pitched, or has heavy lichen growth, calling a professional is safer and more cost-effective.