The warranty period of a wind turbine is one of the key aspects for a wind asset operator, but there is one milestone that is sometimes overlooked and yet is of paramount importance to protect the business case: end-of-warranty inspections.

The investment in a wind farm is calculated based on a series of basic assumptions, among which we highlight:

a) that the wind turbines acquired will produce energy according to their
guaranteed power curve.
b) that they will have a minimum useful life of 20 or 25 years.
c) that they will comply with the requirements of the distribution or transmission grid to which the wind farm is connected.

The contractual warranty, also called Defect Notification Period (DNP), must be used to verify that the performance of our turbines is the one indicated by the manufacturer in its specifications. Some of these verifications are One-Off, quick -but not simple- to perform, such as the power curve or compliance with network requirements. Now, how can we be sure that our investment will reach the life foreseen in our financial project?

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