Wind energy is a clean resource that is being efficiently harnessed from anchored onshore and offshore wind turbine farms or for home and office purposes. Meanwhile, transport vehicles are facing energy problems when fossil fuels pollute the environment and electric batteries do not have large storage capacity, so electric vehicles are required to be charged continuously. Therefore, the article proposes a potential solution of using a Cross-Flow Wind Turbine (CFWT) system with a special structure installed on moving automobiles to provide local energy for batteries or on-board electrical devices. Taking advantage of the compressed air near the boundary layer on a moving vehicle, especially at the rooftop position, and the combination of structures such as the deflector and the wing airfoil help wind turbines generate more power. In the framework of this paper, the investigation of two parametric studies of the impeller blade, including blade angle α and blade thickness T, displays that the obtained CFWT power is over three times higher than the open-flow wind turbine, which is calculated theoretically according to the Betz’s law.