What You Can’t See in Your Wind Farm Can Cost You Dearly
An independent technical inspection of your
wind turbines is not a cost — it’s the only way to truly know the condition of
your asset before someone else finds out for you.
The moment warranties stop protecting you
When a wind turbine exits the manufacturer’s warranty
period, responsibility for its condition passes entirely to the owner. It’s a
transition that is often managed reactively: up to that point, any anomaly was
the manufacturer’s problem. From then on, it’s yours.
The same risk arises at the end of an O&M contract: the
operator hands back the site, signs the handover document and leaves. But in
what actual condition are the machines? Have all maintenance tasks been carried
out correctly? Are there incipient defects that were never reported?
And there is a third equally critical scenario: the sale or
refinancing of a wind asset. Any investor or financial institution with sound
judgment will require a clear picture of the real condition of the turbines
before closing a deal. An independent technical report is not a formality —
it’s what separates a well-founded valuation from an estimate made in the dark.
What a technical inspection reveals
A well-executed condition assessment goes far beyond a
visual walkthrough. The goal is to obtain an objective, documented snapshot of
the asset’s condition at a specific point in time.
The interior of the wind turbine concentrates the most
critical systems — and also the most difficult to evaluate without direct
access and specific expertise. Depending on the agreed scope, the inspection
can cover the condition of the drivetrain, oil levels and quality, bearing and
cooling system condition, transformer and cabling status, and control and
safety systems. Vibration analysis or oil sampling can anticipate failures that
have not yet triggered any SCADA alarm.
Equally revealing is the documentary review: analysing work
orders, material consumption and the intervention history can uncover deferred
maintenance, incomplete tasks or recurring patterns pointing to unresolved
underlying issues. The documentation tells a story that the machines either
confirm or contradict.
Three situations where an inspection is essential
1. End-of-warranty inspection.
This is arguably the
most critical and most underused moment. During the warranty period, the
manufacturer is liable for defects and failures. Once it expires, that coverage
is gone. Carrying out a thorough inspection in the months before expiry makes it
possible to identify and claim any deficiencies while there is still an
obligation to remedy them. Missing that window can mean taking on repair costs
that rightfully belonged to the manufacturer.
2. End of O&M contract.
When changing operator or
bringing maintenance in-house, it is essential to document the condition in
which the site is received. Without that objective baseline, any future dispute
over the origin of a defect will be impossible to resolve. The handover
inspection is the clean starting point that protects both parties.
3. Technical due diligence in transactions.
In a sale
or refinancing, the real condition of the turbines determines the real value of
the asset. An independent technical report produced by O&M specialists —
not generalist consultants — lends credibility to the seller and confidence to
the buyer. It reduces perceived risk and, more often than not, speeds up the
closing of the deal.
Why the inspector’s independence matters
One aspect that asset owners do not always consider: a
technical report only has real value if the person signing it has no interest
in the outcome. An operator inspecting their own work, or a company with ties
to the manufacturer, does not offer the same assurance as an independent
technical team with no commercial relationship with any of the parties
involved.
Independence is not a formal requirement. It is the
condition that makes the report credible to an investor, a court or an insurer.
Growind Systems: independent technical expertise
At Growind Systems we carry out technical condition
inspections of wind turbines with the same rigour we apply to full park
management. Our team combines hands-on O&M experience with the critical
distance that only independence can provide: we do not operate the machines we
inspect, and that is precisely what makes our assessment reliable.
If you have an upcoming warranty expiry, an operator
transition underway or a transaction under consideration, we would be glad to
walk you through how we can help.
