This paper describes microgrids with a large proportion of renewable sources, and electric vehicles as consumers and sources of electricity. The aim of the work was to analyze the influence of electric vehicles on the operating conditions of the microgrid. In order to carry out such an analysis, basic knowledge about the principle of operation of microgrids, renewable energy sources and electric vehicles is required, which is covered in the first part of the paper. After this knowledge was adopted, a microgrid model was designed in the MATLAB software package, in which all the previously mentioned elements essential for a properly conducted analysis were used. By simulating the operation of the microgrid without, and then with the influence of the V2G regime, different results of electricity production and consumption in the microgrid were obtained. By observing the frequency deviations in both cases, the conclusion was reached that the use of the V2G regime must be carried out within certain limits of the integration of electric vehicles in order to achieve the best possible regulation of the operating conditions of the network.