Abstract
A 30 kWp rooftop solar photovoltaic (PV) power plant was modelled using energy balance equations, 3-year energy production and its economic return is calculated according to the feed-in tariff agreement. Hourly measured electricity generation and Excel spreadsheet simulation results were closely compatible. The system generated 45.35 MWh, 47.05 MWh and 46.34 MWh of energy in year 1, 2 and 3, respectively. It has been observed that the performance ratio of the PV system varies between 84.50 % and 90.27 %, while the capacity factor varies between 17.26 % and 17.63%. While 93.90 MWh of electrical energy has been injected into the grid over a 3-year period, 46.40 MWh of energy has been taken from the grid. The price of electricity injected and consumed was calculated according to the FIT conditions at the time the system was installed, and the payback period was calculated as approximately 6 years.
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