AEROTERRA PDMS S.R.L.
Industrial photovoltaic maintenance
Drone cleaning, thermographic inspection and vegetation control — for industrial halls, rooftops, façades and solar parks.
0 PPM DEMINERALISED WATER · NO DETERGENTS IN ROUTINE CLEANING · NO MECHANICAL CONTACT
The numbers
average annual energy loss from soiling worldwide (IEA-PVPS Task 13); without planned cleaning and in farming areas, over 10 % (NREL)
TDS in the water we wash with, measured before every job
pressure on the glass never exceeds the panel manufacturer's limit — checked before every job
people on the roof or under the mounting structures
Services
01
Drone photovoltaic panel cleaning
We clean panels with 0 ppm demineralised water sprayed from short range. No detergents in routine cleaning, no brushes, no mechanical contact with the glass. Surface pressure is measured and matched to the panel manufacturer's specification.
02
IR thermographic inspection and performance report
We fly the entire surface with a thermal camera and produce a map of hotspots, faulty cells and soiling levels. The report shows exactly where production is being lost, so you know what is worth fixing.
03
Vegetation control with robotic machines
Mowing and vegetation maintenance between panel rows using robotic machines, on slopes and in tight spaces, with no personnel in the risk zone.
04
Roof cleaning
Industrial hall roofs, tiled and sheet-metal roofs — cleaned remotely, with no scaffolding, no lifts and nobody on the roof. Moss and lichen hold moisture against the covering and shorten the life of the material.
05
Façade cleaning
Render, concrete, precast panels, brick and curtain walls. We remove both atmospheric soiling — dust, soot, particulates — and biological growth: algae, moss, lichen and mould.
06
Photogrammetry, orthophoto and 3D models (in preparation)
Orthophoto and 3D model from aerial images, for rooftops and solar parks. Service in preparation.
METHOD · FAÇADES
Why pressure alone is not enough on a façade
On façades, unlike photovoltaic panels, the main problem is not dust but biological growth. On a porous mineral substrate — old render, concrete, precast panel — algae, moss and lichen do not remain only on the surface. Their anchoring network penetrates the pores of the material. Pressurised water removes the visible layer but does not reach the structure beneath, while on a degraded substrate it risks detaching the render. The result is a façade that appears clean for a few weeks, after which the growth returns.
Correct treatment takes place in two stages. First: a biocidal product is applied at low pressure and left to act. The dwell time is not a formality — it is the mechanism that makes the method work, and it is measured in hours, not minutes. Second: the dead biomass is removed by rinsing.
Atmospheric deposits — dust and soot — are a different problem, with different chemistry. A single product does not solve both situations, and a real façade usually has both one and the other.
A biocide does not wash. It kills the growth — removing it is a separate step.
How we work
Pre-job check
Panel manufacturer, permitted pressure, water source and access. A thermographic inspection, if ordered as a separate service, is carried out under IEC TS 62446-3 conditions.
Transparent price
The price follows from the number of panels or the surface area and the distance; you can calculate it yourself in the price calculator. The final quote comes in writing, after we check the panel manufacturer and the water source.
Execution
Drone cleaning with demineralised water produced on site or delivered from our depot.
Final report
Job report included: demineralised-water consumption, measured pressure, before/after photos. The before/after thermographic comparison is a separate, paid service, available on order.
Why us
We measure, we don't estimate
Pressure on the glass and water purity are measured and documented on every job. Thermography, ordered as a separate service, shows exactly where production is being lost. You get evidence, not a promise.
Zero risk to the panels
Pressure limits differ dramatically between manufacturers. We check your panels' specification before we start.
Nobody on the roof
Work at height is eliminated. Operators stay on the ground, the drone does the work.
DIAGNOSTICS · THERMOGRAPHY
What the thermal camera sees and you don't
A panel can be perfectly clean and still lose output. Inside, a cell can be hot: an activated bypass diode, a microcrack, a bad solder joint, dirt cemented along the lower edge of the frame. From the ground nothing is visible. The inverter shows only the total of the whole system, and the loss of a few panels disappears into that total.
The thermal camera sees it directly. A cell that does not produce becomes a consumer and heats up: it shows warmer than its neighbours. The drone flies the entire surface in minutes and we obtain a map per panel: hotspots, panel thirds out of circuit, cracked glass, faulty junction boxes and the soiling pattern on the surface.
Why it matters in money: a hot cell degrades irreversibly and, in extreme cases, is a fire risk. A panel third out of circuit is a third of that panel's production. A performance warranty claim needs documents — the thermographic report, with date, irradiance and the position of every panel, is exactly that evidence. And it identifies precisely whether, besides the dirt, you also have other losses — activated bypass diodes, faulty cells, loose connections — so you can fix them in time, before they spread.
It pays on its own: at the handover of a new system, before the warranty expires, when output drops for no known reason, after hail or a storm.
How we measure: under the conditions of IEC TS 62446-3, at an irradiance of at least 600 W/m² in the plane of the panels, with a radiometric camera; irradiance and weather are recorded on site. Thermography is a separate service with its own price; you will find it in the price calculator.
Washing recovers what you lose to dirt. Thermography shows you precisely whether you are losing anything else — and where.
WARRANTY PROTECTION
Measured pressure, not claimed
Module manufacturers state their pressure limit in different ways: some at the nozzle, some at the glass surface, and some without specifying where it is measured (Canadian Solar: 40 bar; JA Solar: 6.9 bar). A claim like "we wash at X bar" says nothing about the pressure that actually reaches your panel's glass.
AT THE NOZZLE
- First Solar
- 35 bar
- Jinko Solar
- 35 bar (min. 0.5 m)
- Canadian Solar
- 40 bar*
AT THE GLASS
- JA Solar
- 6.9 bar*
- Trina Solar
- 7 bar
- Risen Energy
- 7 bar
- LONGi
- 7 bar
Our reference: pressure on the glass never exceeds your panel manufacturer's limit. Values taken from the manufacturers' official manuals, checked in September 2026. *The manufacturer does not specify where the pressure is measured.
REC, Meyer Burger and Heckert Solar explicitly prohibit pressure washing in their official manuals. For their modules, as well as for Q CELLS — where damage caused by the cleaning method is excluded from warranty — we obtain written approval before quoting.
Frequently asked questions
Technical answers, no guesswork
01Can drone washing damage the panels?
There is no mechanical contact with the glass — no brushes, no squeegees. Pressure is kept below the panel manufacturer's limit, and the method is documented for every job.
02What happens to the panel warranty?
Washing with hard water or unapproved detergents can be grounds for rejecting a warranty claim. We use 0 ppm demineralised water with no detergents in routine cleaning, and for extreme contamination we use only pH-neutral agents approved by the module manufacturer. The method is documented for every job.
03Where does the water come from?
We produce it on site from your mains supply, using a mobile filtration and reverse-osmosis unit, or we deliver it ready-made from our own depot. Consumption per job is measured and reported.
04Why does ordinary washing leave marks?
Tap water contains calcium and magnesium. As it dries, these stay on the glass as deposits that attract more dust. Water at 0 ppm contains nothing that can be left behind, so no wiping is needed.
05How often is cleaning needed?
Frequency depends on the environment: in intensive agricultural areas one job a year is the reasonable minimum, and a second may be needed after long dry spells. The recommendation follows from the actual condition of the panels, not a fixed calendar.
06Why do you work early in the morning?
At low irradiance production is close to zero, so the job does not affect the day's yield. Cold glass also washes better — washing a hot module in full sun is explicitly prohibited by manufacturers because of the microcrack risk.
07Why do I need thermography if you wash the panels anyway?
Because washing and thermography answer different questions. Washing recovers the production lost to dirt. Thermography precisely identifies the additional losses — activated bypass diodes, hot cells, microcracks, faulty connections — which cannot be seen from the ground and which you can fix in time. The report locates them on each panel. We measure at an irradiance of at least 600 W/m², per IEC TS 62446-3.
Contact
Request a quote
Tell us where the installation is, its kWp and the surface type. We will come back with a proposal.
+40 755 061 172[email protected]Sat Lazuri, Comuna Lazuri, Satu Mare county, Romania