How the losses values are calculated?

  • Gabriel Simões
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13 Jun 2022 21:40 #11110 by Gabriel Simões
How the losses values are calculated? was created by Gabriel Simões
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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  • Paul Gilman
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14 Jun 2022 17:01 #11117 by Paul Gilman
Replied by Paul Gilman 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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