30/10/2026
Science says a clean solar panel is worth more than a fancy one.
A new study published in October in the journal Earth's Future found that regularly cleaned solar panels can gain more than 40% more capacity than dirty ones. Regular cleaning beat sun-tracking technology, the expensive hardware designed to squeeze more power out of every panel.
Here's the twist: the study used performance models applied to global radiation data going back to 2002. The finding is simple. Dust and grime block sunlight, and no amount of clever technology fixes that. Only cleaning does.
Rain doesn't do it either. Rain leaves mineral residue and pollen behind, and a dry Australian spring bakes it on. If your panels haven't been cleaned since winter, they're running below their rating and your power bill is quietly covering the difference.
Here's what happens next: book a professional solar-panel clean. We clean panels from the ground using pure water and coating-safe methods, the same visit can clear the gutters below and check the roofline, and we flag anything that needs the right qualified trade.
A general caveat: the 40% figure comes from a modelling study, not a promise for any specific home. How much you gain depends on where you live and how dirty your panels actually are.
Exterior cleaning only. We don't service, repair or rewire solar systems. For faults or electrical concerns, contact your installer or a licensed electrician.
Call 1300 339 274 for a free roof assessment, or message us for a quote / maintenance plan.
Jet Wash Australia: 5.0-star reviews, fully insured, reliable service and WorkSafe compliant.