Trianel Windpark Borkum II

Trianel Windpark Borkum II is the 200 MW, second-stage extension of the municipal Trianel Windpark Borkum cluster in the German North Sea, sited roughly 45 km north of Borkum. The project was developed to expand generation capacity while re-using the park’s pre‑existing offshore substation and grid connection infrastructure, reducing the need for duplicated platform works and enabling a more compact export strategy to the DolWin Alpha converter. Construction began after a 2017 finance close and the programme advanced through monopile foundation installation, inter‑array cabling and turbine installation over 2018–2020. The project encountered timetable risk following the insolvency of the initial turbine supplier, which delayed delivery and commissioning into mid‑2020, but the owners and contractors managed re‑sequencing and logistics to complete the build. Trianel Windpark Borkum II is notable as a municipally led offshore development that pooled many small utility investors and used an optimised shared‑infrastructure concept with the first phase. The financing and contracting approach attracted attention at the time for securing low margins on offshore project debt. Operationally the farm exports its AC output via export cables to the DolWin Alpha HVDC converter for onward transmission to shore. The project plays a strategic role in regional offshore build‑out by demonstrating reuse of park infrastructure and municipal investor coordination in German offshore wind.