Understanding temperature effects on PV system performance

Within the framework of task 2 of the photovoltaic power system programme (PVPS) of the international energy agency (IEA) performance results of grid-connected and stand-alone PV systems in different countries have been compared. In this paper the effect of the elevated cell-temperature on the annual performance of 18 selected grid-connected PV systems of different mounting (freestanding, roof-mounted and integrated PV facades) from different geographic location in 5 countries are analysed. Annual data-sets of hourly data have been used for this in depth analysis.