Wind energy is energy from the air currents that circulate through the atmosphere. It is a source considered clean, renewable and available everywhere. Currently the use of wind energy to generate electricity is already a reality in Brazil. It is known that multiple are the criteria that can be used to carry out the analysis of the efficiency of the wind power generation sector. The multicriteria tool adopted in this research will be the data envelopment analysis. The main objective is to assess the relative efficiency of wind energy production in Brazilian states between 2015 and 2019 and then apply the inverted frontier model, in order to order the analyzed set and identify the falsely efficient units. The efficiency analysis indicated that of the 58 (fifty-eight) units analyzed, 9 (nine) were classified as efficient. The application of the inverted frontier model ordered the units according to the standardized efficiency measure and identified 8 (eight) units with false efficiency. It was possible to conclude that the FCM product (average annual capacity factor) had a significant weight in the calculations of efficiency measures of the UTDs (decision making unit).