WHAT IS IAM LOSSES IN SOLAR PV SYSTEM | Fresnel's laws |

WHAT IS IAM LOSSES IN SOLAR PV SYSTEM | Fresnel's laws |
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The incidence angle modifier or IAM is a way to account for optical losses that occur when the solar angle of incidence on the array surface is greater than zero. In other words, when the array surface is not perfectly normal to the rays from the sun, some energy is lost to reflection from the module surface materials.The incidence effect (the designated term is IAM, for "Incidence Angle Modifier") corresponds to the decrease of the irradiance really reaching the PV cells's surface, with respect to irradiance under normal incidence. This decrease is mainly due to reflexions on the glass cover, which increases with the incidence angle.
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Nice presentation. But the narrator is just reading the text and there is no explanation. These notes are available in PVsyst's help guide