API field
Incidence-angle modifier
How much light the module glass accepts at oblique angles
What it is
The incidence-angle modifier section describes the module's angular response: how much less light the glass accepts as the sun moves away from perpendicular. It holds the method choice, the parameters of the parametric methods, and an optional measured table.
Typical values and how to get it
Leave the method on automatic, which uses the module's own table when it has one. The parameters of the parametric methods only matter for the method that uses them.
References
- ASHRAE Standard 93-2010, Methods of testing to determine the thermal performance of solar collectors (incidence-angle modifier)
- IEC 61853-2:2016, Photovoltaic module performance testing and energy rating, Part 2: spectral responsivity, incidence angle and module operating temperature measurements
API
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