In the last years, increasing attention is being spent towards the applications of solar energy to electric and also to hybrid cars. But, while cars only fed by sun do not represent a practical alternative to cars for normal use, the concept of a hybrid electric car assisted by solar panels appears more realistic (Letendre et al., 2003; Fisher, 2009). The reasons for studying and developing a Hybrid Solar Vehicle can be summarized as follows: • fossil fuels, largely used for car propulsion, are doomed to depletion; their price tends to increase, and is subject to large and unpredictable fluctuations; • the CO2 generated by the combustion processes occurring in conventional thermal engines contributes to the greenhouse effects, with dangerous and maybe dramatic effects on global warming and climatic changes; • the worldwide demand for personal mobility is rapidly growing, especially in China and India; as a consequence, energy consumption and CO2 emissions related to cars and transportation are increasing; • solar energy is renewable, free and largely diffused, and Photovoltaic Panels are subject to continuous technological advances in terms of cell efficiency; their diffusion is rapidly growing, while their cost, after a continuous decrease and an inversion of the trend occurred in 2004, is continuing to decrease (Fig. 1);