Switched On The Business of Breathing Life Into Old Wind Turbines
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Oct 16, 2025 Oliver Metcalfe, Head of Wind Research at BloombergNEF, shares insights on the significant challenges facing aging wind turbines as they reach the end of their operational lives. He delves into the economic considerations of life extension versus repowering. The conversation highlights growing turbine sizes, the complexities of dismantling versus refurbishing, and recycling hurdles for old components. Oliver emphasizes the importance of strategic planning for owners and explores the evolving policy landscape that influences repowering decisions, offering a critical look at this crossroads in renewable energy.
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Reuse Grid Connections Carefully
- Reuse grid connections where possible to speed projects and avoid long interconnection queues.
- Expect limits on capacity increases when you reuse an existing connection, sometimes only ~5% extra.
Plan End-Of-Life From Year Ten
- Start planning end-of-life strategy around year 10–12 of operation to maximize options.
- Track component histories to avoid surprises when ownership changes or records are incomplete.
Blades Are The Recycling Bottleneck
- Most turbine materials are recyclable and can recoup part of decommissioning costs, but blades remain the hardest to process.
- Cement co-processing and emerging chemical or thermal recycling provide practical downcycling or true recycling paths.