Why pure water matters
Deionised water leaves zero mineral residue when it dries. Tap water leaves calcium and magnesium spots that act as new contamination — and reduce light transmission until the next clean.
Harlow · Essex · HertfordshireSolar Panel Cleaning
Solar Panel Cleaning
Restore the kWh You're Quietly Losing.
Harlow, Essex & Hertfordshire.
Independent studies show dirt can reduce solar PV output by 15–25% within 24 months. Our deionised pure-water cleaning lifts every contaminant without scratching, etching or voiding manufacturer warranty — and typically pays for itself in recovered generation.
Free, no-obligation quote. No pushy sales. Family-run, Harlow-based.
Deionised pure-water only
Warranty-safe — no detergents
Reach-and-wash to 12m
Fully insured
Most installs done in 1–2 hours
Service Overview
Understanding solar panel cleaning
What it is
Specialist cleaning of solar PV panels using deionised (pure) water at ambient pressure with soft non-abrasive brushes — removing bird droppings, pollen, dust, atmospheric film and lichen without chemicals or hot water.
Who it's for
Any solar PV owner whose generation figures have dropped vs the same month a previous year, panels visibly streaked, or installs more than 12 months old. Particularly relevant for arrays under tree cover or near agricultural land.
When you need it
Spring (post-pollen, pre-summer peak generation) is optimal. Annual maintenance cleaning recommended. Emergency cleans available after bird-strike or storm contamination.
Why professional help matters
Rain alone does NOT clean panels — it leaves a tide-mark of dissolved minerals that build up year on year. Tap water leaves spotting on drying. Detergents void manufacturer warranties on many premium panels.
If left untreated
The cost of doing nothing.
- Dirt films reduce PV output 5–10% within 12 months, 15–25% within 24.
- Bird droppings create permanent hot-spots — concentrated current that damages cells.
- Pollen and tree sap chemically bond to glass over time and become impossible to remove without specialist work.
- Lost generation on a dirty solar array can mean meaningful missed FiT/export earnings every year.
- Lichen growth at panel edges shorts wiring over multi-year periods.
Common mistakes
What we see go wrong.
- Cleaning with tap water — spotting fixes the contamination in place.
- Using detergents or domestic cleaners — voids most premium PV warranties.
- Sending a window cleaner up a ladder with a sponge — scratches the anti-reflective coating.
- Skipping cleaning to save money — every month of dirt costs more in lost generation.
Our Process
A predictable system, from first call to clean-up
- 01
Inspection
Drone or pole survey of array, contamination type and any visible cell or junction-box issues.
- 02
Pre-Rinse
Soft pure-water rinse to lift dust and loose debris before brushing.
- 03
Soft Brush Clean
Carbon-pole soft-bristle brush worked across every panel with constant pure-water flow.
- 04
Final Pure-Water Rinse
Deionised rinse leaves a spot-free finish; no detergent residue.
- 05
Sign-Off
We log clean date and panel count; check your inverter app the next sunny day — most owners see immediate uplift.
The Benefits
What you actually get for the money.
Measurable output gain
Most arrays recover 10–20% of lost generation immediately.
Warranty-safe cleaning
Pure water only — no detergents, no warranty risk.
No scratching
Soft-bristle reach brushes designed for PV glass.
Fully insured
Insurance documents available on request.
Pays for itself
Typical clean recovers more in 6 months of generation than it cost.
Visual inspection included
We'll flag any panel discolouration, junction-box damage or wiring issues we spot.
Deep Detail
The technical bit — for the people who like to know
Detergents and PV warranties
Major panel manufacturers (LG, REC, SunPower, JinkoSolar) explicitly void warranty if detergents, solvents or pressure washers are used. Pure water is the manufacturer-approved method.
Bird-strike & droppings
Bird droppings are acidic and create localised hotspots — concentrated current the bypass diodes can't always handle. Prompt clearance recommended after gull or pigeon strike.
Tree sap and pollen
Pine sap and oak pollen chemically bond to glass within 6–12 months. We carry pure-water-compatible bio-cleaners for severe cases that remain warranty-safe.
Residential vs commercial PV
Domestic installs quoted by panel count. Commercial arrays (schools, warehouses, farms) quoted by panel count with planned-maintenance contracts available.
FAQ
Straight answers to common questions
Stop losing kilowatt-hours to dirty glass.
Warranty-safe, insured, measurable result. Free, no-obligation quote.
Fully insured · Companies House #15556482 · Family-run · 4+ years
We cover
Based in Harlow CM18, working across Essex and Hertfordshire.