The paper deals with the modeling and analysis of the effects of integrating photovoltaic systems into the body elements of electric vehicles. The aim of this paper was to examine the capacities, opportunities and effects of local electricity generation in real electric cars. Given the complex geometry of the vehicle and its mobility, this task posed a relatively complex engineering challenge. A mathematical model in MATLAB software has been developed that enables the estimation of the time diagram of photovoltaic panels production integrated into moving objects of complex geometry. Based on real irradiation measurement data for several locations in Serbia, analyses and calculations of the energy balances of electric vehicles with and without integrated photovoltaic panels in the car body were carried out. The results of the paper show the cost effectiveness for the application of this solution in the automotive industry. In addition to the local production of clean energy, the effects of increasing vehicle autonomy and longer range, less frequent visit to the charging station, less dependency and less impact of vehicles on power system are also achieved.