Fresnel Losses

Thanks, I can model different AR coatings fairly easily.

Flat Plate PV Model
For AOI of 90 or higher, I would think that there should be no Beam Irradiance, only Diffuse. That is not what the model shows. Am I missing something?

Paul Ahrens

Nevermind. I realize the Beam Irradiance values must be before 'cosine loss' calculations.