Due to the whole society attention to the problems of automobile emissions and energy use, all kinds of new energy automotive technology obtain rapid development in recent years. The characteristics of solar energy make photovoltaic cells applications from the field of solar car to development on the civil electric cars. This paper designed a kind of small electric vehicle application of photovoltaic power generation systems. The main problem is to improve the utilization of solar energy photovoltaic battery and find an effective way to reduce running loss due to the application of photovoltaic power generation system caused by the increase in weight.