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How to calculate BVoc value?

Kaan Yildirim

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The Voc value as a function of the temperature is calculated from the one-diode model.
See the help “Physical models used > Standard one-diode-model

This temperature coefficient muVoc (usually called Beta in the datasheets) is usually not equal to the value mentioned on the datasheets. If you really want to use the value of the datasheets for your sizing, you can define it explicitly in the PV module’s definition, page “Additional data / Secondary parameters”:

And specify this option in the project’s settings, page  “Design conditions”:


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