Meteotest represents Switzerland in the IEA Wind TCP, Task 54 (formerly Task 19), which deals with wind turbines in cold climates, with a focus on the icing of rotor blades. The icing of rotor blades leads to reduced production, poses a risk of ice throw, and can shorten the service life of the turbine. The problem of icing turbines is highly relevant for Switzerland, as most wind turbine sites in Switzerland are exposed to icing during the winter months. The Task 54 expert group facilitates international cooperation and promotes the identification of technical problems, their resolution, and the publication of the latest findings. Switzerland is planning to actively participate in various work packages of Task 54 for the period 2025-2028.