•Eproduced systemenergy[kWh]Produced system energy will be measured during thetest period of ten (10) consecutive days. The relevantmeter where produced energy will be measured shallbe the one whereremuneration for electricity production will be granted.(metering in the substation)•GTIGlobal TiltedIrradiance[kWh/m2]Average value, collected by the calibrated tiltedpyranometersoftheinstalledmeteorologicalmeasurement stations for the test period of 10consecutive days. Sensors must be cleaned daily.The deviation of the pyranometer sensors shall notexceed 5%•Atotal module area[m2]Total area of PV module•ηSTC module[%]According to PV module datasheet•αtempFactorThis factor will be used to improve the accuracy of PRmeasurementstocompensatethedifference between simulated monthly and realmeasured module temperature by the sensors of themeteorological station during the 10 days ofthe test period•j[min]Interval of measurements = 15 min