The topic of the bachelor thesis is a design of a photovoltaic power plant, which aims to achieve the maximum possible utilization of insolation, energy efficiency and electrical energy independence of the subject consumer i.e. analysis of the above on a business hall. The discontinuity of the electricity consumer in question was analyzed and based on the form of 15-minute curves. The mentioned 15-minute curves are actually average (mean) values of consumer load i.e. the dependence of electricity consumption in a 24-hour time period can be shown by this curve. Given that the 15 minutes intervals are very short and give high accuracy of consumption, in this thesis is taken interval of 60 minutes. For the purposes of designing a photovoltaic power plant, 8 regions throughout the Republic of Croatia were analyzed. The analysis led to the conclusion that the parts of southern Croatia have the highest exposure to solar radiation, thus the focus of the work was directed to the city of Hvar, which has the most hours of sun exposure within a year. By analyzing the exposure of Hvar to solar radiation, the profitability of the subject solar power plant can be seen in more detail through this thesis. The thesis is based on the study of renewable sources, the necessary focus on photovoltaic systems and was completed in consultation with experts.