Solar Panel Cleaning
Dirty panels can lose up to 30% of their generating capacity. Sunova restores peak performance safely — no chemicals, no fuss.
Do Solar Panels Need Cleaning?
A common misconception is that solar panels are completely self-cleaning because of our frequent rainfall. While rain can help rinse away loose dirt, it isn't enough to remove all the contaminants that build up over time.
Your solar panels are constantly exposed to the elements, allowing dirt, dust, pollen, algae, lichen, tree sap and bird droppings to accumulate on the surface. Even panels with hydrophobic coatings can still develop stubborn deposits that rain simply cannot wash away.
As this layer of dirt builds up, less sunlight reaches the solar cells, which can reduce the efficiency and energy output of your system.
It's also important to remember that solar panels work together as a connected system. If just one panel becomes heavily soiled, it can affect the performance of the entire string, reducing the overall energy your system generates.
Professional solar panel cleaning helps restore maximum efficiency, improve energy production and protect your investment for years to come.
How Often Should Solar Panels Be Cleaned?
There isn't a one-size-fits-all answer, as the ideal cleaning schedule depends on your property's location and the surrounding environment.
For most homes across the UK, a professional clean every 2–3 years is sufficient to keep panels performing efficiently.
However, you may benefit from more frequent cleaning if your property:
- Is surrounded by trees or overhanging branches
- Is affected by bird activity or nesting beneath the panels
- Is located near busy roads, farmland or industrial areas where dust levels are higher
- Regularly experiences heavy moss, algae or lichen growth
In these situations, cleaning every 12–18 months can help maintain peak performance and prevent long-term build-up.
Why Choose SUNOVA?
At SUNOVA, we use specialist, solar-safe cleaning methods designed to remove dirt and organic build-up without damaging your panels. Our professional service helps:
- 10% off your first booking for new customers
- Fast lead times of 3–5 days on all bookings
- Improve solar panel efficiency
- Maximise energy generation
- Remove bird droppings, algae, moss and lichen
- Protect the lifespan of your solar panels
- Maintain the appearance of your installation
- No scaffolding required in most cases
Whether your panels have lost their shine or you're simply looking to keep them performing at their best, SUNOVA provides a safe, reliable and professional cleaning service you can trust.
Ready to restore your solar output?
Request a free, no-obligation estimate for solar panel cleaning — we'll respond within 1 working day.
Frequently asked questions
Will cleaning damage my solar panels?+
No. We use soft, specialised cleaning tools designed specifically for solar panels — no harsh chemicals, no abrasive tools and no pressure washing. This is the method recommended by most panel manufacturers.
How much energy will I gain after a clean?+
It varies with how dirty the panels are, but studies and our own before/after monitoring typically show a 15–30% output improvement on heavily soiled systems, and a noticeable uplift even on lightly soiled panels.
Do I need to be home during the clean?+
Not usually. As long as we have access to the property and an outdoor water tap, we can carry out the clean and send you before-and-after photos when we're done.
Do you clean panels in winter or wet weather?+
Yes. Our cleaning system works in most weather conditions. We only reschedule for high winds or icy roofs where working safely from the ground isn't possible.
How much does solar panel cleaning cost?+
Pricing depends on the number of panels and roof access. Request a free, no-obligation estimate and we'll respond within 1 working day.