The study focuses on the design and energy efficiency of the savonius type vertical axis wind turbine, it is relevant in the production of electrical energy with low carbon emissions, using mainly renewable energy sources. First, the performance of the wind turbine system was evaluated in the city of Huancayo (Peru) at an altitude of 3303 m above sea level, recording a wind speed of 6.20 m/s. The projected area of ​​the wind turbine was determined, which represents the space occupied by the turbine, obtaining a value of 0.23 m2. From this result, the volumetric flow of air was calculated, obtaining 1.43 m3/s, and the density of the air at this altitude was determined, obtaining 0.84 kg/m3 as a result. Likewise, the result was 13.65 Watts of maximum extractable power from the wind, which represents the maximum amount of energy that the wind turbine can capture and convert into usable energy. In addition, the electrical energy generated was calculated, obtaining 13.65 w/s, equivalent to 13.65 Joules, and the kinetic energy of the wind, which was 23.02 Joules. With these results, 59% energy efficiency was obtained in the vertical axis wind turbine, this means that the capture of energy from the wind increases, reducing greenhouse gas emissions. Finally, the energy efficiency of the vertical axis wind turbine improves the ability of the wind generation system to efficiently convert wind energy into usable electricity that promotes energy stability by diversifying the energy matrix and reducing dependence on fossil fuels.