Abstract
With the popularity of Electric Vehicles (EVs) and the development of smart grids, it is increasingly strong in the world, including Vietnam. Research into integrating renewable energy and electric vehicles is bringing many advantages. However, the large number of electric vehicles will affect the grid, leading to the instability of the power system. This paper refers to a small grid system (Microgrid) on the island using renewable energy sources designed on HOMER and MATLAB software. In addition, consider the impact scenarios of electric vehicles when connecting to the grid during the time frames of the day. Calculate costs when designing Microgrids in the most efficient mode of operation.