This paper proposes a new system for the storage of energy that can be used in solar e-vehicles, e-vehicles, and hybrid e-automobile. Supercapacitors are charge storage devices that look similar to batteries, have a low energy density, high power density, and exceptional life cycle. Though they have less energy capacity than the state-of-the-art batteries, however, they are able to deliver 10-100 times more powerful than the li-ion batteries. Unlike other conventional systems, this system uses just a portion of the vehicle power via a DC-DC converter. This concept is new and reduces the converter losses, helps in the complete utilization of stored energy in storage units, and gives stable DC bus voltage irrespective of the operating situations and conditions. In the proposed system a controller is added between the solar panel setup and the battery to improve performance. The aim is for a simple yet feasible way to extract and store the energy from a PV source. Here we are using buck-boost converters, i.e. SEPIC (Single Ended Primary Inductor Converter) converters which allows potential at the output to be varied as per requirement. In battery and supercapacitor circuits both energy is stored, but in the battery, chemistry is changed when it is discharged, which is not so in the case of this system.