Maximise Your Solar Output
Dirty solar panels can lose up to 25% of their generating capacity. Our specialist pure water cleaning service restores maximum performance without voiding your manufacturer warranty.
Solar panels accumulate bird droppings, algae, dust, pollen and airborne debris that significantly reduce their ability to generate electricity. Regular professional cleaning is the single most effective maintenance action you can take to protect your investment and maximise returns. Access Window Cleaning provides specialist solar panel cleaning across the West Midlands using deionised pure water — the only cleaning method approved by most panel manufacturers.
What Sets Us Apart
Pure Water Only — No Detergents
We use only fully deionised water to clean solar panels. No detergents or chemicals that could leave residue, damage coatings or void your warranty.
Manufacturer-Approved Method
Deionised pure water cleaning is the method recommended by leading panel manufacturers including SunPower, LG, Panasonic and most warranty policies.
Performance Recovery
Studies show soiled panels generate up to 25% less electricity. A professional clean can quickly recover lost output, often paying for itself within weeks.
No Pressure Damage
We clean with soft brushes and pure water at low pressure. No high-pressure jets that could damage cell coatings, frame seals or junction boxes.
Residential & Commercial Arrays
From a 10-panel domestic array to a large commercial or agricultural ground-mount system — we have the equipment to clean any installation safely.
Bird Proofing Available
If birds are nesting under your panels, we can install mesh guarding to prevent nesting without interfering with airflow or panel output.
How It Works
Quote
We quote based on panel count, roof pitch and access requirements. Pricing is transparent with no hidden extras.
Safe Access
We use appropriate access equipment — extended water-fed poles, scaffolding or MEWPS — to reach panels safely without walking on your roof.
Pure Water Clean
Soft brushes and deionised water remove bird droppings, algae, pollen and dust without scratching or leaving residue.
Performance Check
We recommend checking your inverter output in the days after cleaning to confirm the performance improvement.
Common Questions
How much output do dirty solar panels lose?
Research varies, but soiling typically causes a 5–25% reduction in output depending on the degree of contamination. Bird droppings on even one cell can cause disproportionate output losses due to hotspotting.
Will cleaning void my solar panel warranty?
Using approved methods — pure water with no detergents and no high pressure — will not void your warranty. In fact, most manufacturers require regular cleaning as a warranty condition.
How often should solar panels be cleaned?
Once or twice a year is sufficient for most domestic installations. Arrays in agricultural areas, near motorways or under trees may benefit from more frequent cleaning.
Do you walk on the roof?
No. We use extended water-fed poles to clean panels from the gutter line or from appropriate access equipment — we never walk on tiles or panels.
Can you install bird proofing at the same time?
Yes. We can install stainless steel mesh guarding around the panel perimeter to prevent pigeons and other birds nesting underneath. Ask for a combined quote.
Ready to Book?
Get your free, no-obligation quote today. We respond within 24 hours.