A solar vehicle includes a vehicle body, a solar panel mounted on the vehicle body, and a vehicle battery and a conversion device arranged inside the vehicle body. The vehicle body contains therein a vehicle load connected to the vehicle battery. The conversion device includes a conversion circuit, a power flow sensor, multiple input and output ports. The conversion circuit includes a DC bus and various converters (such as DC/DC, bi-directional DC/DC, bi-directional AC/DC converter, and inverter). The power flow sensor detects power flow received in the input ports and feeds the power to the conversion circuit for conversion. The solar panel provides electrical power from solar power generation to the conversion device, which after carrying out conversion, supplies the power through the output ports to the vehicle load and the vehicle battery. As such, the electrical power received by the input ports is subjected to conversion by the conversion device and thus output through the output ports and the power flow sensor detects the power flow of the input power to select one or more of the input ports to supply electrical power to the conversion device for conversion and supply of the power to the vehicle battery.