Solar Panels Not Pulling Their Weight? It Might Just Be Dirt…
Solar panels not pulling their weight? It might just be dirt. And if so, you’re likely losing out on energy—and money—without even realising it. At Alfresco, Oxfordshire’s best rated Exterior Cleaning Company, we help homeowners get the most from their panels, simply by keeping them clean.
It’s easy to forget about solar panels once they’re installed. After all, they just sit on the roof, quietly doing their job. However, over time, dirt builds up. Dust, pollen, bird droppings, moss spores, and algae form a thin layer across the surface. This layer reduces the amount of sunlight reaching the photovoltaic cells.
According to industry studies, dirty solar panels can lose up to 14% of their energy yield. That’s a significant drop, especially if you’re relying on solar for day-to-day power or to reduce your energy bills. In some cases, the loss is even greater—particularly if nearby trees or heavy traffic contribute to grime and pollution.
We clean panels using the same purified water system trusted in our window cleaning services. This method removes contaminants without using any chemicals or abrasive materials. It’s safe, effective, and leaves no residue behind. Because pure water naturally attracts and absorbs dirt, the panels are left completely spotless.
Our team uses high-reach poles with soft-bristle brushes, allowing us to clean the panels from ground level or using tower scaffolds and cherry pickers, depending on roof access. We never walk on the panels. That’s not just risky—it voids warranties. Instead, we work around the panels carefully, ensuring full coverage without contact damage.
We also inspect the panels visually during the clean. That way, we can flag any signs of bird nesting, loose wiring, or cracked edges—issues that might otherwise go unnoticed.
Cleaning your panels once or twice a year keeps them working at their best. Spring is a particularly smart time to book, since pollen and dust levels spike during this season. By summer, when solar output peaks, your panels will be clear and fully exposed to sunlight.
Many of our customers first contact us after noticing a dip in their solar performance. Often, a professional clean restores output within 24 hours. The difference is measurable—not just in yield, but also in your energy savings.
Solar panels not pulling their weight? It might just be dirt. But you don’t have to climb on the roof or risk damaging them trying to clean them yourself.
Contact Oxfordshire’s best rated Exterior Cleaning Company today. We’ll provide a safe, efficient clean and help you get the performance you paid for.
