The topic of the bachelor´s thesis is alternative sources of electric energy in buildings. First of all, the thesis presents the up-to-date types of alternative sources. The main alternative sources are the static resources such as UPS and the rotary convertors such as motor-generator. The first part bachelor´s thesis I divided and described the alternative sources according to the point of view for example structure, functions and main parameters. The second part deals, design alternative sources for the specified object. The aim of this thesis is to summarize all the knowledge of the alternative sources to analyse their pros and cons and to alternative information about their usage, and in practice, to propose an alternative source of a p...