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Solar Panel Cleaning · Oxfordshire
Solar Panel Cleaningin Wallingford
Between the Thames and the open fields around it, panels in Wallingford gather pollen, field dust and bird mess that rain does not lift. We wash them with purified water and a soft brush, then let them dry naturally.
- Purified water, nothing added
- Left to dry without wiping
- Roof, ground and thermal
The short version
Clean glass comes from clean water not from soap or force
Most of what dulls a solar panel is a thin, stubborn layer rather than thick dirt. Lifting it needs gentle agitation and enough rinsing, and the quality of the water matters as much as the brush. We use de-ionised water throughout, so the glass can be washed, rinsed and left alone to dry with nothing added and nothing left behind.
Around Wallingford
A river town ringed by gardens and open fields
Wallingford sits on the west bank of the River Thames, with an old market centre of period buildings surrounded by established family homes and newer residential streets. Many of those houses have mature gardens, and where solar panels have been added they may be on the main roof, an extension or a garage.
Step beyond the town and the land opens out into farmland and riverside villages. That mix shapes what lands on the glass. Panels near gardens and trees collect pollen, sap and leaf fragments, while those facing open ground pick up fine dust carried on the wind through spring and summer. Shaded corners by the river can also let moss settle along the lower frames.
The water
Why we wash and rinse with de-ionised water
Ordinary tap water carries dissolved minerals. When droplets evaporate from glass, those minerals stay behind as spots and rings, which is why a car washed with a hose and left in the sun rarely looks right. De-ionised water has had those minerals taken out, so it dries without marking.
That changes how the job is done. Because the final rinse leaves nothing on the surface, the panels can dry on their own and nobody needs to towel or wipe across the glass. It also means no soap is used at any stage, so nothing runs off the array into the gutters, the drains or the borders underneath.
Seasonal film
Field dust and pollen that build up over the summer
In spring and early summer, pollen settles across an array as a fine, slightly tacky coating. Dry spells add airborne dust, and the two bind together with dew into a haze that a passing shower only rearranges. Panels set at a shallow angle hold on to more of it, because the water runs off them slowly.
This kind of film is easy to miss from the garden. The panels still look dark from below, and only up close does the glass show a dull, even layer. A soft brush fed with pure water loosens it without scrubbing, and a thorough rinse carries it away.
Installations
The kinds of solar installation we clean
The method stays the same from one installation to the next: purified water, a soft brush and no pressure. What changes is how close we can get and which parts need extra care.
- Roof-mounted PV: the usual domestic array, reached with a water-fed pole from the ground where the layout allows
- Ground-mounted arrays: every panel within reach, so each face, frame and edge is brushed and rinsed in turn
- Solar thermal: flat plates and evacuated tubes, with extra care around the manifolds and seals
- Conservatory and glass roofs: no electricity involved, but the same gentle pure-water approach
On the day
Four stages from dusty to dry
Before any of this happens, a free site visit confirms how each panel will be reached. The clean itself then follows the same order every time.
- 01
Check the array and its access
We confirm the panel layout, pitch and the safest position for the pole, and look over the frames and seals before the glass gets wet.
- 02
Brush with purified water
Water from the pole flows through soft bristles as they move across the glass, lifting pollen, dust and dried bird mess without detergent or scraping.
- 03
Clear the lower frames
Moss and grit that gather where the bottom frame meets the glass are worked out of the corners and edges, not just the open face of each panel.
- 04
Final rinse and natural drying
A last pass of de-ionised water takes away what has been loosened, and the panels dry in the air. We then tell you about anything we spotted on the frames or fixings.
Realistic results
What a clean changes, and what it leaves alone
Cleaning restores clear glass. It does not change how the system was designed, how it faces or what shades it, and it is not an electrical check. Because generation depends on so many other things, we never put a percentage on the difference a clean will make.
Pollen, dust and birds come back each year, so a clean is maintenance to repeat at sensible intervals. Any sign of damage we notice, such as a cracked panel or a lifted seal, is a matter for a solar installer.
Why us
Reasons to have us look after your panels
Nothing added to the water
No detergents and no chemicals, so the glass is left bare and nothing is rinsed onto your roof, into the drains or across the garden.
No wiping, no scraping
Purified water lets the panels dry spot-free on their own, so the glass is touched only by soft bristles during the wash.
Feet stay off the panels
A water-fed pole reaches most domestic arrays from the ground. Where it cannot, we explain that at the site visit rather than on the day.
Fully insured
Our operatives are fully insured, and the work is agreed in a clear quotation so you know what is included before booking.
Nearby
Solar arrays in the villages around the town
Our panel cleaning also reaches the villages around Wallingford, among them Crowmarsh Gifford across the bridge, Cholsey, Benson, Brightwell-cum-Sotwell, Shillingford and Moulsford. The site visit and the method are the same wherever the array is.
Solar Panel Cleaning in nearby towns
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Questions
Solar Panel Cleaning in Wallingford: your questions
Why not just use a hose and washing-up liquid?
Detergent leaves a film that attracts fresh dirt, and tap water leaves mineral spots as it dries. Reaching the panels from a ladder or the roof also carries more risk than the job deserves. Purified water on a pole avoids all three problems.
Do you dry the panels after cleaning?
No. De-ionised water dries without leaving marks, so the panels are simply left to dry in the air. Towelling would mean more contact with the glass for no benefit.
Can you clean a ground-mounted array in a large garden?
Yes. Ground-mounted panels are easier to reach, so each one can be brushed and rinsed individually, frames and edges included. The method is the same purified water and soft brush we use on a roof.
Do you clean solar thermal panels as well as PV?
Yes. Flat-plate and evacuated-tube collectors are cleaned with the same de-ionised water, taking extra care around the manifolds and seals, which are built differently from a photovoltaic panel.
Will my panels produce more power once they are clean?
It depends. Removing dirt clears shading from the glass, but how much that matters varies with how dirty the panels were, the season, their orientation and the system itself. That is why we do not quote a percentage.
When is the best time of year to have panels cleaned?
There is no single right month. Many owners like a clean after the spring and summer pollen has settled, while panels under trees or near open fields may benefit from two visits a year. Once a year suits most homes.
Do you walk on the roof to reach the panels?
No. Most domestic arrays are cleaned with a water-fed pole from ground level. If an array cannot be reached that way, we will explain why at the site visit before anything is booked.
More from us
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Patio Cleaning
Specialist cleaning and restoration for natural stone, porcelain and concrete patios.
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Soft Wash Treatment
Low pressure soft wash treatment designed to safely remove algae, mould and grime from exterior surfaces.
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Gutter Cleaning
Clear and flush blocked gutters and downpipes to protect your walls, fascias and foundations.
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Winter serviceSlippery Paths, Steps and Patios
Winter cleaning that removes slippery algae and moss from paths, steps and patios, planned around the forecast.
- Slippery growth removed
- Planned around frost
- Chiltern EverGuard™ where suitable
Advice
Expert exterior cleaning advice
Chiltern Surface Co
Book a free site visit to look at your array.
We will check the panels, the access and what has built up on the glass, then explain how we would clean them. A clear quotation follows, and there is no pressure to go ahead.
Surface-specific recommendations
We assess your surfaces and recommend the right approach for the best, long-lasting results.
Clear, fixed quotation
You'll receive a detailed, transparent quote with no hidden extras.
No pressure or obligation
We'll provide honest advice so you can decide what's right for you.
Directly with the owner
Speak directly with the owner and get expert advice you can trust.