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Due to the ability to produce electricity on demand, biogas plants show a high potential to avoid grid overload caused by short-term feed-in fluctuations of photovoltaic (PV) power plants at the distribution level of the electricity grid. To optimise the balancing approach, the present research is focused on the development of a control system for a privately operated, agricultural biogas plant considering high feed-in gradients of surrounding PV power plants. A ground-mounted PV power plant is modelled using Matlab®/ Simulink™ to forecast the PV power feed-in in high resolution. Among various modelling approaches the five-parameter single diode ?? ?? -model is selected as the central model for a PV cell. To analyse the behaviour of the DC-output of a PV array considering shading effects caused by cloud drift the model is modified from a module to an array system. The computed DC-output of the PV plant is compared in terms of accuracy to the rated value of manufacturer data and analysed in terms of computation time to be integrated within a short time horizon as input data in the control system.