doi:10.1016/j.rser.2017.09.100engZiegler, LisaGonzález, ElenaRubert, TimSmolka, UrsulaMelero, Julio J:Lifetime extension of onshore wind turbines: A review covering Germany, Spain, Denmark, and the UKART-2018-103271A significant number of wind turbines will reach the end of their planned service life in the near future. A decision on lifetime extension is complex and experiences to date are limited. This review presents the current state-of-the-art for lifetime extension of onshore wind turbines in Germany, Spain, Denmark, and the UK. Information was gathered through a literature review and 24 guideline-based interviews with key market players. Technical, economic and legal aspects are discussed. Results indicate that end-of-life solutions will develop a significant market over the next five years. The application of updated load simulation and inspections for technical lifetime extension assessment differs between countries. A major concern is the uncertainty about future electricity spot market prices, which determine if lifetime extension is economically feasible.2018http://zaguan.unizar.es/record/6432210.1016/j.rser.2017.09.100http://zaguan.unizar.es/record/64322oai:zaguan.unizar.es:64322This project has received funding from the European Union’s Horizon 2020 research and innovation program under grant agreement No H2020 642108-AWESOMEinfo:eu-repo/grantAgreement/EC/H2020/642108/EU/Advanced Wind Energy Systems Operation and Maintenance Expertise/AWESOMERENEWABLE & SUSTAINABLE ENERGY REVIEWS 82, 1 (2018), 1261-1271byhttp://creativecommons.org/licenses/by/3.0/es/info:eu-repo/semantics/openAccess