Self-Shading options - Grayed Out

How do I adjust the parameters in "Array Dimensions for Self Shading and Snow Losses" area for a single-axis tracker. The values are not correct, but are un-editable.

Hello,

The array dimensions inputs are greyed out when the Self Shading option is "None" because SAM only uses those inputs when one of the self shading models is enabled.

To make those inputs available, choose "Standard (non-linear)" for cyrstalline Silicon modules, or "Thin film (linear)" for thin film modules.

Best regards,
Paul.

Did you enable backtracking on the System Design page? The self shading option is not available with backtracking because backtracking avoids self shading.

Thanks,
Paul.