Solar Farm Cleaning Singapore
Ground-mount, large rooftop and floating solar arrays cleaned from the air. No foot traffic between rows, no boats working a float field, no panels walked on.
Drone cleaning of a solar farm starts from S$5,000 depending on installed capacity and layout. At utility scale, soiling losses of 15-25% translate into a six-figure annual generation shortfall, so cleaning is an O&M line item with a calculable return rather than a cosmetic expense.
Key takeaways
- Price: From S$5,000 by capacity; per-panel cost falls sharply at scale.
- Floating solar is the standout case - foot access is impossible and boat access is slow.
- Soiling costs 15-25% of output in Singapore conditions.
- Cycle: every 3-6 months, brought forward on inverter evidence.
- No row traffic - nothing driven or walked between rows, so no cable or mounting damage.
On this page
Floating solar: the strongest case
Singapore has invested heavily in floating photovoltaic deployment on reservoirs and water bodies, because land is the binding constraint on solar here. Floating arrays solve the land problem and introduce a maintenance one: you cannot walk on them.
Conventional cleaning of a float field means working from boats, moving slowly along rows, with crew reaching across floats that were never designed as a working platform. It is slow, expensive and carries an obvious immersion risk.
A drone works a floating array from the bank or a stationary support vessel. It does not disturb the floats, does not load the structure, and covers rows at the same rate it covers a rooftop. For reservoir sites there is a second benefit: deionised water introduces no detergents or chemical agents into the water body.
Ground-mount arrays
Ground-mount solar carries a different problem — traffic. Cleaning crews and vehicles moving between rows compact soil, disturb cable runs and mounting structures, and raise dust that settles straight back onto the panels being cleaned.
Aerial cleaning removes all row traffic. It also handles the awkward geometry of tilted arrays without anyone reaching across a row, which is where most panel micro-cracking happens on ground-mount sites.
The generation maths at scale
A 5 MWp array in Singapore generates in the order of 5.8 million kWh a year. At S$0.25/kWh that is roughly S$1.45 million of electricity annually. A 15% soiling loss is around S$217,000 a year.
Against that, a cleaning programme costing tens of thousands annually is a small fraction of the recovered value. This is why utility-scale operators schedule cleaning rather than reacting to it — the loss accrues continuously and silently between cleans.
Solar farm cleaning cost
| Array | Approx. capacity | Typical price (SGD) |
|---|---|---|
| Large commercial rooftop | ~500 kWp | From S$3,500 |
| Small ground-mount farm | ~1 MWp | From S$5,000 |
| Mid-size solar farm | ~3 MWp | From S$8,000 |
| Utility-scale / floating | 5 MWp+ | From S$12,000 |
| Scheduled O&M contract | - | 15% off per clean |
Smaller rooftop arrays are covered on the solar panel cleaning page.
Frequently asked questions
How much does solar farm cleaning cost in Singapore?
Drone cleaning of a ground-mount or large rooftop solar farm typically starts from S$5,000 depending on installed capacity and site layout. Per-panel cost falls sharply at scale because mobilisation is spread across a much larger array.
Can drones clean floating solar farms?
Yes, and it is one of the strongest cases for aerial cleaning. Floating arrays on reservoirs are difficult and slow to access by boat, and foot access is impossible. A drone works the array from the bank or a support vessel without disturbing the floats.
How much output does a soiled solar farm lose?
Between 15 and 25 percent in Singapore conditions. On a utility-scale array that translates into a six-figure annual generation loss, which is why large operators schedule cleaning as an O and M line item rather than treating it as cosmetic.
How often should a solar farm be cleaned?
Every three to six months in Singapore. Sites near construction, industry or heavy vegetation soil faster. Most utility-scale operators run a scheduled cycle and use inverter data to decide whether to bring the next clean forward.
Sources
- Energy Market Authority - Singapore solar deployment and electricity tariffs
- PUB - floating solar deployment on Singapore reservoirs
Operating a solar farm?
Send installed capacity and site location. We quote scheduled O&M programmes as well as one-off cleans.