Last updated: 10 April 2026
Solar panel cleaning in Singapore restores generation output lost to dust, pollen, bird droppings, biological film, and haze-season particulates — using deionised water and a soft carbon-fibre pole so there are zero chemicals, zero abrasives, and zero risk of voiding the panel warranty. Lion City Glass provides specialist solar panel cleaning for landed homes, condominium rooftops, commercial buildings, and industrial installations across Singapore.
Why Singapore Solar Panels Need Professional Cleaning
Solar panels in Singapore lose generation efficiency faster than almost anywhere else in the world. The combination of high humidity, daily rainfall carrying airborne particulates, intense equatorial UV, pollen from surrounding vegetation, bird droppings, and the occasional haze event forms a progressive film on the glass surface that blocks light before it can reach the photovoltaic cells underneath.
Industry studies consistently show soiled panels in tropical climates lose 10–25% of their rated output compared to clean panels, and in severe cases — acid rain bonding combined with dust accumulation — the loss can exceed 30%. For a typical 10 kWp residential installation in Singapore, that translates to hundreds of dollars per year in lost energy generation. Professional cleaning on a regular schedule pays for itself in recovered output alone.
How We Clean Solar Panels
- Deionised water supply. Tap water is pushed through a DI resin bed that removes every dissolved mineral. The output has near-zero TDS — critical for solar panels because any residual mineral leaves a fine film after drying that re-reduces output.
- Carbon-fibre telescopic pole with soft brush. Lightweight, non-abrasive, and long enough to reach 3.5 storeys of rooftop installation without us ever touching the panels or walking on them.
- Pure-water brushing. The brush gently lifts dust, pollen, bird droppings, and biological film while the deionised water flushes everything off the panel. No scrubbing, no scratching, no thermal shock.
- Streak-free rinse and drip-dry. Because the rinse water is mineral-free, the panels dry on their own without any residue — no towel, no squeegee, no contact with the anti-reflective coating.
- No chemicals whatsoever. We never use detergents, acids, alkaline cleaners, solvents, or proprietary “solar cleaning” fluids. Every major panel manufacturer (LG, REC, SunPower, Trina, Jinko, Longi, Canadian Solar) explicitly recommends against chemicals for exactly this reason.
Why Chemical-Free Matters — Warranty Protection
Solar panels have an anti-reflective (AR) coating on the glass that captures an extra 2–3% of incoming light compared to uncoated glass. This coating is delicate. Harsh cleaners, abrasive pads, and even pressure washing can degrade or strip it — and many panel warranties explicitly exclude damage from chemical cleaning. Once the AR coating is gone, it can’t be restored, and the panel will under-produce for the rest of its service life.
Our pure-water method is the only cleaning process that comes with no warranty risk whatsoever. It’s the same method recommended by most Tier 1 solar manufacturers in their official O&M manuals, and it’s been the global standard for professional solar cleaning since the early 2010s.
What We Clean
- Residential rooftop solar — landed home installations on pitched or flat roofs, typically 5–15 kWp
- Condominium rooftop arrays — strata title building installations, MCST-managed
- Commercial rooftop solar — factories, warehouses, shopping centres, office buildings
- Industrial rooftop installations — larger systems requiring multi-day cleaning cycles
- Ground-mount and carport arrays — driveway carport canopies, garden installations
- Solar water heater panels — the glazed collector panels on evacuated-tube and flat-plate systems
- Integrated BIPV (building-integrated photovoltaic) facades — when the solar panels form part of the building envelope
How Often Should Singapore Solar Panels Be Cleaned?
Singapore’s climate is demanding on solar panels. We recommend a cleaning schedule based on your installation’s exposure:
- Every 3 months for installations near construction sites, industrial areas, or heavy vehicle corridors where atmospheric dust is high.
- Every 4 months for residential installations surrounded by tall trees dropping pollen and leaves seasonally.
- Every 6 months for standard residential and small-commercial installations in low-exposure environments.
- Immediately after the Southeast Asian haze season (typically August–October) when airborne particulates settle on panels and bond during the next rainfall.
- After any painting, roof work, or nearby construction — cement dust and paint overspray on solar panels need to be removed within days to prevent permanent bonding.
Panels that have gone 12+ months without cleaning are often already losing 15–25% of their output and should be inspected before the next rainfall cycle.
Solar Panel Cleaning Pricing in Singapore
Pricing depends on the number of panels, accessibility, and whether the cleaning is a one-off visit or part of a scheduled programme:
- Residential rooftop (up to 20 panels): from SGD 450 per visit
- Larger residential (20–40 panels): SGD 650 – 900 per visit
- Condominium and small commercial (40–100 panels): quote on site visit
- Large commercial and industrial (100+ panels): scheduled programme pricing
Maintenance programme discounts apply the same as our water-fed pole window cleaning service — quarterly programmes receive 15% off every visit, bi-annual programmes receive 10% off. This is the most cost-effective approach for any installation serious about maximising generation output.
Our Solar Cleaning Process
- WhatsApp photos or site visit. Share photos of your installation and roof access via WhatsApp to +65 9669 3006, or book a free site assessment. We confirm panel count, roof accessibility, and reach requirements.
- Fixed-price quote. You receive a fixed price before we begin — no hourly billing, no surprise charges.
- Pre-clean inspection. We check for visible damage (cracked glass, hotspots, animal nests, loose mounting) and flag anything that needs separate attention from your solar installer.
- Deionised water cleaning. The pure-water brushing pass removes all dust, pollen, biological film, and bonded particulates in a single sweep per panel.
- Generation output confirmation. Where you have a monitoring system, we check the generation reading before and after so you can see the improvement directly.
- Optional maintenance programme. Schedule your next visit before we leave and lock in the programme discount.
Frequently Asked Questions
Will cleaning my solar panels really increase output?
Yes, often significantly. Panels that haven’t been cleaned in 6–12 months in Singapore’s climate typically recover 10–25% of their rated generation within minutes of being cleaned. If you have a monitoring system, you’ll see it on the same afternoon. Dust, pollen, bird droppings, and biological film are the main culprits — they’re invisible from the ground but block a surprising amount of incoming light.
Doesn’t rain clean them for free?
No — rain actually makes the problem worse in Singapore. Rainwater contains dissolved minerals and pollutants that bond to dust particles already on the panel, creating a cemented layer that’s much harder to remove than the original dust. This is why panels in tropical climates need more frequent cleaning than panels in dry climates, not less. Rain only “cleans” panels in truly unpolluted environments.
Why don’t you use chemicals or detergents?
Because every major solar panel manufacturer — LG, REC, SunPower, Trina, Jinko, Longi, Canadian Solar, and others — explicitly prohibits chemical cleaning in their warranty terms. Chemicals can strip the anti-reflective coating on the glass, which permanently reduces panel efficiency and voids the warranty. Pure deionised water is the only globally accepted professional method that carries zero warranty risk.
How high can you reach?
Our standard carbon-fibre pole kit reaches up to 3.5 storeys — enough for virtually every landed home and small-commercial rooftop installation in Singapore. For taller installations, we can quote elevated work platform (EWP) or rope access as an add-on.
Do we need to be home during the cleaning?
Only if we need you to unlock access to the roof or balcony. Most residential jobs are completed from the grounds without any house access at all — we just need your garden tap. For condominium and commercial jobs, we coordinate with the facility manager for roof access.
Will you walk on my solar panels?
Never. Walking on solar panels is one of the most common causes of micro-cracks in the silicon cells — damage that permanently reduces output and often voids the warranty. Our water-fed pole method means the technician stays safely on the ground while the pole reaches the panels. No foot traffic on the glass, no mounting stress, no risk.
Do you also inspect the panels for damage?
Yes — during every visit we check for visible issues: cracked glass, discoloration or hot-spots, loose mounting hardware, animal nests, and obvious wiring damage. If we find anything, we flag it in writing and recommend you contact your solar installer for repair. We do not repair the electrical side ourselves — cleaning only.
Book a Solar Panel Cleaning Visit
For the fastest quote, WhatsApp a photo of your solar installation and a rough count of panels to +65 9669 3006 — we’ll reply within 2 business hours with a fixed-price quote. You can also use our contact form or ask about a scheduled quarterly maintenance programme for the best per-visit rate.