Achieving sustainable energy development implies investing in renewable sources of electricity such as photovoltaic power plants, wind power plants, hydroelectric power plants, etc., which greatly contribute to reducing the negative impact on the environment. As part of this work, a photovoltaic power plant project was developed for the production facility of the Aluflexpack Novi d.o.o. factory, which consists of several separate buildings defined by different slopes, roof dimensions and certain objects on the roof itself. The design included the creation of a power plant model using PVSOL Premium software, the calculation of voltage conditions, the determination of lightning protection, the calculation of the energy balance, the definition of the bill of quantities and the creation of drawings using AutoCAD software. All electrical installation equipment and accessories are of a quality, characteristics and properties in accordance with the applicable technical regulations and rules. The first and second chapters elaborate on the general characteristics of photovoltaic systems as well as the selection of photovoltaic modules and inverters. The third chapter presents a technical description of the considered production facility of the investor Aluflexpack Novi d.o.o. and the creation of a 3D model on which the design was based. The fourth chapter presents the necessary calculations that satisfy the various technical conditions according to which the equipment was selected.