The transition to renewable energy sources is critical for reducing greenhouse gas emissions. This process changes the landscape structure. Through the example of Hungary, we presented the methods of estimating the annual electricity production based on solar energy at the national level using a GIS tool. In connection with the calculations, we summarized the landscape and environmental effects of different land uses, and we covered the physical characteristics of electric current which affect the spatial structure of production. In addition to determining the potential of solar energy, the environmental and physical characteristics determined the tasks, possibilities and limitations of landscape architecture in using solar energy.