To achieve the ambitious renewable energy (RE) targets in Germany, future decentralized RE investments and installations, such as rooftop photovoltaics (PV) are necessary, despite the decreasing feed-in tariffs. To stimulate additional building owners to install new PV panels, we have developed a prototypical GIS-based 4-dimensional solar potential analysis based on high resolution digital surface models, generated using structure from motion analysis based on aerial photography. Using the city of Nürtingen as a case study, we calculated rooftop insolation with a very high spatial and temporal resolution. By overlaying PV generation profiles with standardized electricity demand profiles for different user types, we can give accurate and valid estimations of the economic profitability of photovoltaic installations. This information shall support the local realization of the energy turnaround, but also can be used in planning support systems following the principles of Geodesign.