Multi-user solar plants (MSPs) are a new form of organising the operation of photovoltaic (PV)-plants, whereby private citizens operate or finance the plant. In this master thesis, an examination of the questions, if an investment in a MSP can be bankable and which organisational parameters lead to a maximum profit, are conducted. By the means of literature researches and discussions with experts, the technical and organisational parameters, that have a substantial effect on the profitability of these projects, are scrutinized. Using the System-Dynamics approach, these factors are modelled in the MultiUserSolarplant-Simulator ? MUSS, which calculates the central results of the generated electricity and the net present value. The simulations of MUSS show that under an optimal organizational framework, MSPs can be operated in a profitable way. Therefore the licence of a feed-in-tariff is a prerequisite. In addition, the way how citizens participate in the profit is a central parameter for the result of the net present value. If this is organised by company shares, this may lead to the compulsory preparation of a capital market brochure, which hinders smaller MSPs from a profitable operation. The second variant is provided financing by the citizens, which is in general a deposit business that requires a bank concession. In the case that this cannot be avoided and the initiating company is not already possessing one, a profitable operation of the project is impossible. Since the optimal organisational parameters of MSPs usually cannot be implemented in reality, the results of the simulations are reflecting a theoretical ideal value. However, using the graphical user interface of MUSS, it is possible to scrutinize the profitability of specific MSPs.