In order to assess the effects of a lower availability of wind and solar resources on the configuration of a least-cost electricity system operation, the annual electricity generation of wind and PV power plants is reduced by 15% for the scenarios with a renewable share of 80%. With the reduced availability of variable renewables, pump storage is used less, but curtailment of wind and PV power plants still amounts to approximately 4% of their annual electricity generation. In total, renewables show a share of 68% in the annual electricity demand.