In case you are using a fixed structure, the software recommends a pitch value that will ensure at least 4 hours of unshaded operation of the PV arrays during the most unfavorable day of the year (winter solstice).
If you’re using a tracker, the recommended pitch distance is the one that makes the GCR 40%.
For E-W structures, the pitch distance is calculated as follows:
- pvDesign calculates the minimum pitch distance: the one that makes clearance distance 0.
- It then adds an industry-standard clearance distance value:
- For 1H or 1V: 0.3 meters
- For 2V or 2H: 1 m
- For other configurations: 2 m