Frequently asked questions
The questions O&M teams ask before requesting a quote, answered straight. Where there is no firm figure, we say so.
How long does the intervention take per turbine?
One working day per machine, including the full scope of blades, tower and nacelle. Rope access takes four to five days per turbine.
How much does it cost to clean a wind turbine by drone?
It depends on the scope and the rotor diameter of the machine. We fix a price per turbine from three data points: number of machines, location and rotor diameter. Request a quote and we will send one matched to your site.
What is your minimum order?
4 turbines per campaign. Below that figure, mobilisation and demobilisation are quoted separately.
What permits are required and who handles them?
Operating a drone around a wind farm requires aviation authorisation. We file it with the Spanish aviation authority as part of the service, so the client submits nothing. It is what sets the activation timeline, around 3 weeks from confirmed order, and it can be shorter at sites with no aviation constraints.
What happens if it is windy on the scheduled day?
Drone work depends on a weather window, exactly as rope access does. The final date is confirmed the week before, based on the forecast. Standby and abort-and-return scenarios are set out in the commercial proposal from the start, so they do not surface later.
Does the turbine have to be stopped for the whole operation?
Yes. The machine has to be in maintenance position during the intervention, with yaw and pitch controlled by the site. The difference against rope access is that this stop lasts one day, not four or five.
What is the maximum working height?
Up to 100 metres of nacelle height.
What evidence do we receive?
Before and after photographic reporting for every turbine cleaned, delivered as part of the service.
What insurance covers the operation?
Public liability cover for the activity, included in the service. It is not an additional arrangement for the client.
How often should a wind turbine be cleaned?
There is no single published manufacturer figure. Industry practice is at least one review or clean per year, more often in higher wear locations: coastal sites, or sites with heavy exposure to dust, salinity or insects. It depends on where the fleet sits.
Do you have experience with large utilities?
Yes. Eolinet delivered and invoiced a full cleaning campaign for a major Iberian utility and, after operational validation, received a repeat order for a second site within three months. We are prequalified as a contractor for that company. For confidentiality reasons we do not publish the client name or the wind farm names.
Do you work outside Spain?
We operate at wind farms across Spain. For campaigns in Portugal and the rest of Europe, get in touch: we review the administrative requirements of the country before committing to a date.
What does the site need to prepare?
The turbine in maintenance position (yaw and pitch control) and preventive sealing of the nacelle. Everything else is on us, including water, pressure equipment, compressors and degreasers.
Do you work for owners only, or also for OEMs and service providers?
Both. An owner books a campaign for their own fleet; a manufacturer or maintenance provider subcontracts the cleaning within their own service agreement with the site, without changing their relationship with the end client.
Tell us about your site and we will send you a quote
Three data points are enough: number of turbines, location and rotor diameter. We come back with a fixed price per machine and scope within two working days.