This paper presents the complete preplanning for installation of a Solar petrol pump in India. So a self-operated power generating system is applied for supplying the power to all essential systems, such as Fuel Filling Machine, Fire Fighting Equipment, computers, fan & many more internal wiring system range of any Petrol Station in order to avoid power cut, generater noice, mess, envirmental pollution and many more issues. Hence in order to achieve maximum power in effective manner a rooftop photovoltaic power station is used. This system uses one or more photovoltaic panels, installed on rooftop of petrol pump, to convert sunlight into electric power. The various components in a rooftop photovoltaic power station include photovoltaic modules, mounting systems, cables, solar inverters and other electrical accessories. So the complete design & Implementation idea of this combinational power system is discussed in this paper.