Due to the increasing integration of decentralized power genera-tion systems, distribution network operators are dealing with growing challenges. Low investment costs and high electricity prices of PV are making them more attractive. A decisive criteri-on for the design of new PV-plants is often the voltage mainte-nance in low load cases. In order to comply with the required limits, the network operator provides the subscriber with a method defining certain requirements regarding the reactive power provision and that should be considered in the design pro-cess. According to VDE AR 4105, there are three methods that can define the requirements of the reactive power provision.