How the losses values are calculated?

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GabrielSimoes
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13 Jun 2022 21:40 #11110 by GabrielSimoes

How the losses values are calculated? was created by GabrielSimoes

Good night.

I'm trying to validate the loss diagram values, but I'm no luck. I'm using this formula, for example:

shading loss percent = 1 - sum(values without shading column)/sum(values after shading column)

And I'm getting very close results: -2.95% on loss diagram and -3.05% on my calculations.

I wonder what am I doing wrong?

Thks in advance.

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pgilman

14 Jun 2022 17:01 #11117 by pgilman

Replied by pgilman on topic How the losses values are calculated?

Hi Gabriel,

The source code for the loss calculations are around this line of code:

github.com/NREL/ssc/blob/05ed7c13afef9fd3529abd51e8d06bbfed841aef/ssc/cmod_pvsamv1.cpp#L2754

The shading loss calculations depend on the various options on the System Design and Shading and Layout input pages. The descriptions in Help should help you identify which outputs apply for the different options.

Best regards,
Paul.

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