Abstract. The paper deals with the influence of different types of cloud on the production of electricity by photovoltaic panels. In the introductory part of the paper, processes in the atmosphere are described, giving rise to various types of clouds and, consequently, to the formation of cloud. In the next section of the paper, the system is described on which the research and the methodology of acquisition and data evaluation were carried out. The last part of the paper summarizes the overall results of the research.

In presented paper authors summarize potential of various options for the application of photovoltaic systems. On this continues other part which is focused on the influence of slope and orientation to the production of electricity by photovoltaic panels. It includes the example of electricity production at an existing system in year 2014. The last part of the paper examine the influence of surface contamination on photovoltaic panels and their effectiveness. At the end of the presented paper is summarized findings of the authors.