When the first service contract expires: strategic choices for wind parks

Across Europe, many wind parks are approaching a major milestone in their operational life cycle. Although wind turbines are typically designed for a lifetime of around 20 to 25 years, the first major tipping point often comes earlier: when the initial maintenance contracts expire after 10 to 15 years. At that point, wind park owners face a strategic choice. Rather than automatically continuing existing agreements, this presents an opportunity to redefine the best approach to managing their assets in the next phase.

“After the initial maintenance contract expires, it makes sense to look at all available options in the market. A lot can change in 10 or 15 years: technologies improve, new service providers emerge and financial conditions evolve,” said Joost Cornelli, team leader of the realization team at GreenTrust.

GreenTrust works with wind park owners to determine the best next step. There is no standard solution. One possibility is to extend the original service contract with the turbine manufacturer. Another is switching to an independent maintenance partner that can perform the same work, sometimes under different commercial terms. “In the first years, owners usually rely on the manufacturer’s service organization, but later they sometimes choose independent specialists who can do the maintenance just as well,” Joost said.

Financial considerations also play a role here. About 10 to 15 years after construction, the loans used to finance many wind parks are often (mostly) repaid. This gives owners more flexibility to adjust maintenance strategies or contractual guarantees. “This is precisely why it makes sense to review all existing agreements after such a long period. A lot changes in the market during that time, including technology, providers and operational options,” Joost adds.

In some cases, operators are seizing this moment to rethink the entire asset strategy. In addition to renegotiating maintenance contracts, wind park owners can also look at broader strategic options. For example, turbines can be replaced with newer and more powerful models, while existing turbines are sold, refurbished and given a second life in another location. Another option is life extension. As turbines approach the end of their design life, specialized engineering studies can determine whether they can safely continue to run longer. Even wind parks heading toward 25 years – depending on the results of these analyses – can often continue to produce green energy for several more years.

“Our role is to help clients determine what works best for their specific situation. Every wind park is different, so we look at the most appropriate approach together,” says Joost. GreenTrust supports clients throughout the process by coordinating external experts, providing operational data and ensuring that all the necessary information is available for proper analysis. GreenTruster Senne Koetsier is the expert and point of contact for this. “We guide clients through the decision-making process and ensure that the right data and information are available. Engineering firms need a lot of operational input and documentation, and we help translate their technical questions into the information our customers can provide. This is how we ensure that calculations and final reports are correct,” Joost explains.

With thousands of wind turbines in Europe reaching similar milestones in the coming years, lifecycle management is becoming an increasingly important topic within the renewable energy sector. With the right strategy, be it optimized maintenance, lifetime extension or second-life solutions, wind parks can continue to produce renewable electricity for years after their initial service contracts.