This bachelor work deals with the usage of solar energy in a selected family farmhouse. The work consists of five chapters which concur narrowly. The first part is focused on the specification of the chosen family farmhouse, its specialization and geographical position and so on. The next part deals with the possibilities how to use the energy of solar ray in the selected farmhouse. There is basic information about acceptable solar installations and their simple description. Because the most of solar systems have high initial investment, in next chapter I deal with the financial resources of the Czech Republic and its particular ministries such as grants, which can be used nowadays. In last two chapters there is an acceptable solar system selected for the usage of sun energy, costs of realization calculation and return rate of investments. The whole suggestion is concluded with the evaluation of the chosen project.