In this paper a hybrid solar system made with photovoltaic cells and thermoelectric modules has been analyzed. The theoretical energy conversion and the performance parameters have been investigated and compared with respect to design and geographic location using a simulated model. In particular, the effects of the global radiance, of the ambient temperature and of the hours of sunshine on the power and energy production are assessed. The obtained results show that the advantages of the thermoelectric modules use are less significant when the locations considered are very distant from the equator.