For each PV unit, there are three values that impact the amount of power that a solar panel of this type will output within a solar installation. This article describes these values.
This represents the PV unit's nominal power at standard test conditions. This is what the panels are capable of producing under 1000 W/m² irradiance at 25 C. It will almost always considerably exceed real-world performance.
NOCT stands for Nominal Operating Cell Temperature. This is the temperature that the manufacturer expects the panels to heat up to during operation in nominal operating conditions, which are 800 W/m² irradiance, 20 C, a 45 degree tilt angle, and 1 m/s wind. NOCT is typically between 45-48 C.
This is the temperature coefficient of power. This value corresponds to the percentage of power lost for each degree above 25 C the panel temperature rises.