Turbine upgrades offer a cost-effective way to increase Annual Energy Production (AEP), but are they truly worth the investment? How can the gains be accurately quantified, and what potential drawbacks might go unnoticed?

Over 40% of wind turbines were identified as presenting a north offset of at least 10°. Extreme North offsets (higher than 90°) remain quite frequent: on over 400MW of wind turbines analysed, 7% were impacted by these major issues.

North offsets can have major impact on turbine operation and energy yield and contrary to common knowledge, these frequent issues are not automatically checked nor are they part of the standard O&M schedule

Wind turbine performance is highly sensitive to a variety of parameters, and the lack of reliable data often creates uncertainties that are nearly as significant as the differences that need to be detected.

Energy yield assessment might seem an easy task at first but as we look deeper we might find ourselves in a complex and uncertain problem that needs solving.

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