Commercial Solar Panel Cleaning

Specialist Solar Panel Cleaning for Maximum Efficiency & Performance

Keep Your Solar Panels Performing at Their Best

Dirty solar panels are a problem, with dust, grime, moss and debris all getting in the way of performance and cutting energy efficiency. Cleaning solar panels isn’t as simple as hosing them down, and can damage sensitive surfaces. At DW Windows & Gutters Ltd, our professional solar panel cleaning service will have your panels looking spotless in no time.

Why Clean Your Solar Panels?

Maximise
Energy
Output

Dirt and grime block sunlight and reduce efficiency. Regular cleaning helps keep your panels performing at their peak year-round.

Safe, Streak-Free Pure Water Cleaning

Refresh brick, render, cladding, and signage with safe and effective façade cleaning.

Extend
Panel
Lifespan

Removing debris, bird droppings, and moss buildup helps prevent long-term damage, protecting your investment and warranty.

Ideal for Commercial Installations

From office buildings to solar farms, we offer scalable cleaning solutions tailored to your commercial property's size and accessibility.

Before & After Results That Speak for Themselves

Maximise Energy Efficiency

Our specialist low-pressure cleaning systems with purified water are used to remove all traces of dirt, dust and bird droppings. Solar panels perform better and last longer when they are kept clean.

Minimal Disruption

Flexible scheduling and efficient working methods mean we’ll get the job done without disturbing your business operations.

Fully Insured & Safety-Focused

Our team is fully insured, trained, and follows strict health & safety protocols to protect your premises and the public.

Serving Bristol and London

With teams based locally, we cover commercial sites across Bristol, London, and surrounding areas.

Frequently Asked Questions

How often should I have my solar panels cleaned?

We recommend cleaning every 6 to 12 months, depending on your location and environmental conditions. Areas with heavy dust, pollen, or bird activity may require more frequent maintenance.

Will cleaning damage my solar panels?

Not at all. We use soft-bristle brushes and purified water—no harsh chemicals or high-pressure jets—so your panels stay safe while getting spotless results.

Does solar panel cleaning really improve efficiency?

Yes. Dirty panels can lose up to 20% of their output. Regular cleaning ensures you get the maximum return on your solar investment.

Do I need to turn off my solar system before cleaning?

No, but we recommend it for safety. If your inverter has a shutdown switch, our technicians will follow proper procedures before starting any work.

Where do we cover?

DW Windows has a large operational area, and are very proud to cover such a large geographical location. In particular we have a large footprint in both Bristol and London, both of which are key locations for us. We have a long history of happy customers and proven track record in both cities. We offer the same high-quality workmanship, dependable service, and specialist installation knowledge to every customer.

In Bristol, our coverage includes not just the city centre, but also many outlying areas like Clifton, Redland, Stoke Bishop, Downend, Westbury-on-Trym, Filton, Bradley Stoke, and beyond into North Somerset, South Gloucestershire and more. So, whether you live in a flat or house in a modern development in the suburbs, or an old Victorian terrace in one of Bristol’s historic neighbourhoods, we’ve got you covered for residential and commercial projects.

In London, we work throughout the capital, including many boroughs like Camden, Hackney, Islington, Hammersmith, Richmond, and more. We also travel to Outer London areas including Croydon, Ealing, Bromley, Kingston, and others. So, whether it’s a luxury refit in Central London, or energy efficient replacements in a suburban semi in Greater London, our team is on hand to take care of the job with the same dedication and attention to detail.

In fact, we don’t just cover the larger cities of Bristol and London. We also serve a number of outlying towns, villages and rural areas. So if you live just outside one of these cities in the Home Counties, the South West or the Severn Valley region, there’s a good chance we can cover your area. Our team travels well beyond the city limits on a regular basis to service our customers.

If you can’t see your location mentioned above, don’t panic, please get in touch! We are always more than happy to discuss your project and confirm whether or not we can help in your location. At DW Windows, we love what we do, and we love providing a top-quality service – so if you’re anywhere near Bristol, London or even just a bit outside of these locations, it’s always worth giving us a call to find out!