Determination of nominal power according to standard test conditions (STC). The nominal power is determined based on the current and voltage measured from the solar panel during the flash with a maximum light intensity of 1,000 Watt/m². From this measurement, a current-voltage graph (IV-curve) is drawn. This graph determines the point at which the solar panel delivers its maximum power. This power is the nominal (STC) power.
The Flash tester from SolarTester is a class A test and has a measuring accuracy of + 3 till 5%. Therefore, it should always be taken into account that there can be a +/- deviation from the specified Wp volume of a panel.