Harlow, Essex CM18 7DQ Rooftogroundexteriors@outlook.com Open 7 days · 6am–9pm 01279 295996 AboutServices Service Areas Our WorkReviewsContact 01279 295996Request Free Estimate Home/Services/Solar Panel Cleaning Harlow · Essex · Hertfordshire # Solar Panel CleaningRestore 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. Get My Free Estimate 01279 295996 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 ### 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. ### 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 How much does solar panel cleaning cost? Priced per array based on panel count and access. Free, no-obligation quote. How often should panels be cleaned? Will cleaning really increase my generation? Is this warranty-safe? Can you reach top-floor or 3-storey roofs? Do you offer ongoing maintenance contracts? How long does it take? Are you insured? ## Stop losing kilowatt-hours to dirty glass. Warranty-safe, insured, measurable result. Free, no-obligation quote. Get My Free Estimate 01279 295996 Fully insured · Companies House #15556482 · Family-run · 4+ years ## Related services - Roof Cleaning & Moss Removal - Gutter Clearing & Maintenance - Exterior Window Cleaning ## We cover Based in Harlow CM18, working across Essex and Hertfordshire. HarlowBishop's StortfordBroxbourneWaltham AbbeyLoughtonBrentwoodWalthamstowChingfordGreat DunmowMuch Hadham ← Back to home·All services·Contact us Family-run exterior cleaning specialists serving Essex & Hertfordshire. Low-pressure washing, steam, hand-scraping and biocidal treatment — results that last years. Open 7 days, including weekends. 01279 295996 Rooftogroundexteriors@outlook.com 90 The Briars, Harlow CM18 7DQ, United Kingdom Facebook Opening HoursOpen 24/7 · Monday – Sunday CHECKATRADE9.85/10 · 96+ reviews Services - Roof Cleaning & Moss Removal - Gutter Clearing & Maintenance - Fascia & Soffit Cleaning - Pressure Washing - Driveway & Patio Cleaning - Conservatory Roof & Frame Cleaning - Solar Panel Cleaning - Render & Exterior Wall Cleaning - Exterior Window Cleaning Service Areas - Harlow - Bishop's Stortford - Broxbourne - Waltham Abbey - Loughton - Brentwood - Walthamstow - Chingford - Great Dunmow - Much Hadham - Epping - Sawbridgeworth - Hertford - Ware - Hoddesdon - Cheshunt - Chipping Ongar - Stansted Mountfitchet - Buckhurst Hill - North Weald Bassett Company - About Us - Our Work - Reviews - Contact © 2026 Roof to Ground Exteriors Ltd. All rights reserved. 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