Translations:Insolation/7/en
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The power rating of PV modules is determined by testing under standard test conditions, one of which specifies that the test be performed with light of an irradiance (sunlight intensity) of 1 kW/m² (1000 W/m²). A basic calculation of energy production for a PV system can be performed using the power rating of the PV source and the insolation value for the location during a given period.