The scope of this paper is to compare a one year performance of three grid-connected PV module technologies systems, installed at the Faculty of Sciences Semlalia Marrakech (latitude 31.6497°N and longitude 8.0169°W). The studied silicon-based PV modules technologies are monocrystalline (mono-c-Si), amorphous silicon (a-Si) and polycrystalline (poly-c-Si). Monthly and annual evaluated performance elements include: energy output, reference yield, final yield and performance ratio. The results show that poly-Si system presents the best performance followed by mono-c-Si and by a-Si. To our knowledge, these are the first published performance of grid-connected PV systems in Marrakech.