Abstract
Indonesia is very suitable country to use solar energy because Indonesia has a tropical climate and produces daily average energy radiation per unit area and time equivalent to about 4.8 kilo watt/m2, however there are several factors that influence the performance of solar energy, namely PV panel temperature and shadow. Both of these factors are parameters with big influences on PV system behavior due to it greatly affects the system efficiency and output energy. The main effect of increased cell temperature is that on open circuit voltage decreases linearly while cell temperature is increasing. Cell voltage decreases about 2.2 mV per 1°C increase in operating temperature and thus efficiency decreases by about 0.5% for crystalline PV cells. One of the solutions to reduce the effects of excessive heat which results in high temperature in solar PV panels is by installing window film with a distance of 2.5 cm which can produce solar panel output power product with the increase of 23.53% to 24.39% compared to output power product without coating. From the results above, researcher tried to install the window film directly onto the PV solar panel with observation and research methods as well as to analyze the results of the study. The outcome of the study was the temperature was stable at the same conditions while the energy produced was reduced due to direct installation of window film making it as a shadow for PV solar panel
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