Drone Solar Panel Cleaning Singapore
Soiling costs a Singapore array 15–25% of its output. We clean rooftop and ground-mount panels with deionised water from the air — nobody walks on your panels or your roof membrane. From S$900.
Drone solar panel cleaning in Singapore starts from S$900 depending on panel count. Soiling reduces output by 15–25% in tropical conditions, so on a 500 kWp commercial array generating about S$145,000 of electricity a year, a 15% loss is roughly S$21,750 annually — which is why cleaning pays back in weeks rather than years.
Key takeaways
- Price: S$900 under 100 panels; S$2,000–3,500 for 100–500; S$3,500–5,000 for 500–1,200.
- Output recovery: soiling costs 15–25% in Singapore's climate.
- Cycle: clean every 3–6 months; every 2–3 months near construction or trees.
- Warranty-safe: deionised water under 5 ppm, no detergents or chemical agents.
- Recurring contracts take 15% off per clean and cut permit costs on repeat visits.
On this page
The economics of solar cleaning
Most cleaning is a maintenance cost. Solar cleaning is closer to an investment with a measurable return, because the loss can be quantified from your own inverter data.
A 500 kWp commercial rooftop array in Singapore generates roughly 580,000 kWh a year. At S$0.25/kWh that is about S$145,000 of electricity annually. A 15% soiling loss is S$21,750 walking out of the building each year. Against that, a S$3,500 clean pays for itself in under two months of recovered generation.
Why not just send someone up there
Manual cleaning works, and for small or easily accessed arrays it is often the sensible choice. On commercial roofs it carries three costs that never appear on the quote:
- Fall risk and WSH liability. Falls from height remain a leading cause of workplace fatalities in Singapore. Every crew on your roof is exposure you carry.
- Membrane damage. Foot traffic across waterproofing is a common cause of later roof leaks — and the leak surfaces months after the cleaning invoice closes, when attribution is impossible.
- Panel micro-cracking. Standing on or near panels induces cell cracking that does not show visually but does show in output, and can affect warranty position.
Our cleaning method
We prepare deionised water below 5 ppm total dissolved solids on site. No detergents, no chemical agents. DI water dissolves soiling, breaks down organic deposits and evaporates leaving zero mineral residue, protecting anti-reflective coatings and manufacturer warranties.
The drone flies systematic passes at low altitude, spraying across panel surfaces at a pressure calibrated for solar glass — strong enough to lift bird soiling and caked dust, gentle enough to protect coatings. A 100-panel rooftop array takes roughly 60–90 minutes.
Chemical cleaning is the warranty risk. Detergents leave films that attract soiling faster, and some degrade anti-reflective coatings outright. Deionised water is what major manufacturers specify precisely because it leaves nothing behind.
Solar panel cleaning cost in Singapore
| Array size | Typical price (SGD) | Duration |
|---|---|---|
| Under 100 panels | From S$900 | Half day |
| 100 – 500 panels | From S$2,000 | One day |
| 500 – 1,200 panels | From S$3,500 | One to two days |
| 1,200+ panels | From S$5,000 | Quoted on assessment |
| Recurring contract | 15% off per clean | Three cleans a year |
Recurring is where this makes most sense. Singapore's climate re-soils an array within three to six months, and repeat visits to a known site are cheaper for us to run — airspace approvals and logistics are already solved, and CAAS issues block activity permits for repeated operations at the same site. We pass that saving through.
Measuring the result
Singapore's solar capacity has grown steadily under the national target tracked by the Energy Market Authority, and O&M expectations have grown with it. Where you can give us inverter access, we record output before and after cleaning so the recovery is documented rather than asserted. That reading is what justifies the next clean to whoever signs off your O&M budget, and it is the most useful thing you take away from the job. Before-and-after photographs are provided as standard.
Frequently asked questions
How much does solar panel cleaning cost in Singapore?
Drone solar panel cleaning starts from S$900 for arrays under 100 panels, from S$2,000 for 100 to 500 panels, and from S$3,500 for 500 to 1,200 panels. Recurring contracts receive a 15% discount per clean.
How much output do dirty solar panels lose?
Soiling reduces output by 15 to 25 percent in Singapore's tropical climate. Dust, pollen, bird droppings and algae block light transmission. Panels near construction sites or trees soil faster and can lose measurable output within three months.
How often should solar panels be cleaned in Singapore?
Every three to six months. Humidity, bird activity, construction dust and pollen cause faster soiling than in temperate climates. Arrays near construction or under trees may need cleaning every two to three months to hold output.
Does drone cleaning void solar panel warranties?
No. We use deionised water below 5 ppm with no detergents or chemical agents, which is the method major panel manufacturers specify. Chemical cleaning and abrasive contact are what typically put panel warranties at risk.
Sources
- Energy Market Authority — Singapore solar deployment and electricity tariffs
- CAAS — operator and activity permit requirements, including block permits for repeat sites
Find out what soiling is costing you
Send your array size and location. We quote the clean and estimate the output you are losing.