Operating costs are made up primarily of maintenance and repair costs, operations management costs, and lease and insurance payments. Reserve funds for dismantling of the installation and other costs accruing are also included in operating costs. The next figure shows operating costs - the service life is split into two decades. In the second decade, operating costs rise by about 11%. This is attributable to higher maintenance and repair expenditure. It must be noted here however that the first and second decades are different random samples [Rehfeldt].
Wind turbine operating costs over time
Data source: [Rehfeldt et al. 2013]
funded by the Federal Ministry for Economic Affairs and Energy