Solar Panel Row Spacing Calculator
Estimate minimum solar-row pitch, clear gap between rows, total array depth, modules per row and module cost from panel dimensions, tilt and design sun elevation.
Default project preview
13.33 ft
Panel vertical rise
2.87 ft
Horizontal panel projection
6.16 ft
Shadow-clearance component
6.16 ft
Total array depth
46.14 ft
Calculator
Build the material order
Your order will appear here
Enter the project details and calculate a rounded material estimate.
Input and output guide
What each value means
The labels and units below are part of this calculator’s visible methodology. Replace every default with measurements or product data from the actual project.
Usable width of each row
Enter this project assumption in ft. The current imperial default is 60 ft.
Panel width across the row
Enter this project assumption in ft. The current imperial default is 3.7 ft.
Panel length in tilt direction
Enter this project assumption in ft. The current imperial default is 6.8 ft.
Gap between panels in a row
Enter this project assumption in in. The current imperial default is 1 in. Minimum: 0.
Panel tilt angle
Enter this project assumption in degrees. The current imperial default is 25 degrees. Minimum: 0. Maximum: 80.
Design sun elevation
Enter this project assumption in degrees. The current imperial default is 25 degrees. Minimum: 1. Maximum: 89.
Additional service clearance
Enter this project assumption in ft. The current imperial default is 1 ft. Minimum: 0.
Number of panel rows
Enter this project assumption in a unitless value. The current imperial default is 4. Minimum: 1.
Price per panel
Enter this project assumption in a unitless value. The current imperial default is 240. Minimum: 0.
How to read the outputs
Panel vertical rise
25° tilt. Default preview: 2.87 ft.
Horizontal panel projection
plan depth of one row. Default preview: 6.16 ft.
Shadow-clearance component
25° design sun elevation. Default preview: 6.16 ft.
Total array depth
4 rows with entered service clearance. Default preview: 46.14 ft.
Panel layout
60 ft usable row width. Default preview: 15 per row / 60 total.
Panel cost
modules only. Default preview: $14,400.00.
Methodology
Transparent calculation
BuildMeter converts every input to a consistent internal unit, applies the selected allowance, and rounds products up to whole purchasable units.
Panel rise = panel length × sin(tilt). Shadow-clear gap = rise ÷ tan(design sun elevation). Row pitch adds panel projection and service clearance; total array depth repeats that geometry across rows.
FAQ
Solar Panel Row Spacing Calculator questions
What design sun elevation should be used?+
Choose a project-specific seasonal design condition based on site latitude, orientation and acceptable shading rather than relying on a universal value.
Does this account for terrain slope?+
No. Sloped or uneven sites change relative row elevation and shadow geometry.
Why add service clearance?+
A geometric no-shadow gap may still be too narrow for access, drainage, vegetation control or equipment maintenance.