The reliability of a wind power plant also determines their income. Downtime and stnadstill mean a financial loss. To identify failure risks and problems early, condition monitoring systems are used. Especially in hard to reach offshore installations, these systems provide early warning for necessary maintenance or repair work. In a control center in Kiel in Germany data from over 1000 wind turbines come together and are evaluated. The cost of maintenance or downtime can thus be better planned as the new film of the VDI Center for Resource Efficiency shows.