Isi Bilimi Ve Teknigi Dergisi/ Journal of Thermal Science and Technology, cilt.46, sa.1, ss.28-38, 2026 (SCI-Expanded, Scopus)
The negative environmental and economic impacts of fossil fuels have made it essential to meet energy supply from renewable energy sources, especially in recent years. Among renewable energy sources, the popularity of solar energy is increasing day by day due to its ease of application and short payback periods. One of the common solar energy applications is rooftop solar energy systems. In this study, a grid-connected rooftop solar energy application was simulated using PVsyst software, utilizing the electricity consumption data of a textile manufacturing factory with a closed area of 5,000 m2 in the Gaziosmanpaşa neighborhood of Ankara province and considering its geographical location. Taking into account array losses, DC cabling, and system losses, the performance ratio was found to be 77.73%. It has been calculated that 1,002,928 kWh/year of electricity can be generated with the system installed at the facility, which consumes a total of 674,099 kWh/year of electricity. Considering the inflation data of the last two years, with an annual inflation rate of 30% and taking electricity generation into account, it has been determined that the profit to be obtained from the system after 20 years will be 36,406,905 USD. As a result of the environmental impact analysis of the system, it has been calculated that a total of 12,362.1 tons of CO2 emissions can be prevented during the 30-year operational period.