Aytürk Tulukcu, DilaraSayın, Selçuk2024-06-102024-06-102020978-605-65842-3-7https://hdl.handle.net/20.500.13091/5686Population growth in developing countries, industrialization and rapid advancement of technology cause the increase of energy demand day by day. Fossil energy sources, which are frequently used to produce energy, are also rapidly depleting with this demand. In addition, the trend towards renewable energy sources is increasing in the context of the damage caused by the usage of fossil resources and the strategies developed by countries to supply their own energy demands. Buildings have a big role in total energy consumption and are among the important elements of environmental pollution caused by energy consumption. Solar energy is one of the important energy sources with its clean, local and renewable features. It can be used with today’s photovoltaic system technologies, for building energy needs. The aim of the study is to determine the efficiency and cost analysis of a photovoltaic system which was integrated into an existing building. For this purpose, a glass factory building in Afyonkarahisar / Turkey was used. By integrating the photovoltaic system on the roof of this building, the system’s energy analysis, initial investment cost and payback period were calculated. The performance analysis of the system was performed with PVsyst V6.7.8 simulation. On the roof, 5184 piece 265 V si-mono PV modules with a total area of 7014 m2 and inverter with a total power of 1025 kWac were used. According to the results, it is concluded that the grid-connected photovoltaic system can generate 1723 MWh of energy annually, thus 64% of the annual energy need can be supply from the system and the efficiency of the system is 84.49%. It can repay the initial investment cost in about 7 years. It is appropriate to perform the study according to the net present value calculation.eninfo:eu-repo/semantics/openAccessSolar energyPhotovoltaic systemPVsystBuilding integrated photovoltaicsConference Object