Solar Panel Layout Planner
Visualize how solar panels fit on your roof with a scaled grid layout.
Solar Panel Layout Planning
Why Spacing Matters
Row spacing (typically 4–8 inches) accounts for inter-row shading at low sun angles and allows for wire management. Column spacing (2–4 inches) provides clearance for racking hardware and thermal expansion of panel frames.
Portrait vs Landscape Orientation
Most residential panels are installed in portrait orientation (tall, narrow) because it fits more rows on a typical roof slope. Enter your panel dimensions accordingly — a standard 66"×40" panel is 66" tall in portrait mode.
Code-Required Setbacks
Most local fire codes require a 3-foot clear border around panel arrays on all sides to allow firefighter roof access. Some jurisdictions allow 18" setbacks on non-ridge sides. Always verify your local requirements before installation.
Array Dimensions
The array dimensions shown are the total footprint of all panels plus spacing — this helps you verify the design fits within your usable roof area before getting a contractor quote.