Solar photovoltaic (PV) plants are the fastest growing energy sources in the world, with annual growth rates of 25-35% over the last ten years. Most of the new FN power plants are connected to the distribution network, as distributed production, significantly changing the characteristics of the distribution network. In parallel with the increase in the share of FN power plants in the system, there is growing concern about their potential impact on the stability and operation of the power system. This paper analyzes the effects of different levels of integration of FN power plants on voltage conditions and energy losses in the MV distribution network. The analysis of the impact of the FN power plant was carried out on the distribution network with real data on the production of the FN power plant and consumption in the network.