Balaji .B, Venkatesan .D, Arulvizhi .A, International Journal of Advance Research, Ideas and Innovations in Technology. © 2017, www.IJARIIT.com All Rights Reserved Page | 38 ISSN: 2454-132X Impact factor: 4.295 (Volume3, Issue6) Available online at www.ijariit.com A Case Study in Designing and Analysis of Cost for a Solar Photo Voltaic System B. Balaji Assistant Professor CK College Of Engineering & Technology, Cuddalore, Tamil Nadu balaji.bc91@gmail.com D. Venkatesan Assistant Professor CK College Of Engineering & Technology, Cuddalore, Tamil Nadu saransan1977@gmail.com A. Arulvizhi Assistant Professor CK College Of Engineering & Technology, Cuddalore, Tamil Nadu balaji.bc91@gmail.com Abstract: The world faces an increasing an environmental pollution basically as a result of combustion of conventional energy sources. India currently depends on conventional energy to supply power to her teaming population. Due to this, the energy generated does not meet demand. Consequently, the power supply is erratic and areas isolated from the main cities lack power supply. Therefore, the need to develop a non-conventional source of energy generation such as solar cannot be overemphasized. A photovoltaic system that can increase energy output and/or supply power to isolated areas of the country is a good choice, considering the abundance of solar radiated energy in India. In this work as PV system model is designed to work either as a standalone PV system or as grid integrated and the payback period is calculated for the same. The developed model may be useful in the prediction of PV cell behavior under different physical and environmental parameters. The result obtained showed the maximum power output and the corresponding maximum voltage of solar module. Study results demonstrate that, under complex irradiance conditions, the power generated by the new configuration is enhanced than that of the traditional configuration. The solar PV system can be widely used in many consumer applications, such as PV vests for cell phones and music players. Keywords: Solar Photovoltaic System, Solar Radiation, System Arrangements, Maximum Power Output, Cost Analysis and Payback Period. I. INTRODUCTION Presently in our country India, the use of renewable energy is carefully used to support the conventional source of energy, this has led to over-reliance on energy generated diesel power plants, dam’s powered plants and coal-powered plants in India. Because of this most isolated areas do not have sufficient power or no power at all in cases where the transmission lines are not assessable. A high penetration of solar energy known as photovoltaic (PV) energy in India will result in Power being evenly distributed to all parts of the country, Reliable power supply, Reduce the rate pollution of the environment, Increase in the amount of power generated in the country, Power supply to isolated areas of the country where it will cost more to build transmission line to such areas. The intensity of solar radiation reaching earth surface which is 1369 watts per square meter is known as Solar Constant. It is important to realize that it is not the intensity per square meter of the earth’s surface but per square meter on a sphere wi th the radius of 149,596,000 km and with the sun at its center. The efficiency of a PV device is dependent on the spectral distribution of solar radiation. The evaluation of PV devices is generally done with reference to a standard spectral distribution. There is two standard terrestrial distribution defined by the American Society for Testing and Materials (ASTM), direct normal and global AM1.5. The direct normal standard corresponds to the solar radiation that is perpendicular to a plane directly facing the sun. The global