Illustration of solar panels being installed on a roof with dimension labels.

A technical and semi-realistic illustration of a pitched roof with three horizontal rows and five vertical columns of photovoltaic solar panels. The first vertical column of panels appears fully opaque and realistic. The second vertical column is slightly transparent. The third vertical column is more transparent, with mounting rails and hooks beginning to show through. The fourth vertical column is fully transparent, revealing the mounting rails and hooks in detail: In the top horizontal row, hooks are spaced every 60 cm. In the middle row, hooks are spaced every 120 cm. In the bottom row, three horizontal rails are present, with hooks spaced every 60 cm on each rail. The fifth vertical column is also fully transparent, showing roof rafters, rails, and hooks. In the middle horizontal row, the first two hooks are spaced at 60 cm intervals, and all subsequent hooks at 120 cm intervals. Add dimension arrows and labels: A horizontal arrow near the ridge of the roof showing a 30 cm distance from the top edge of the panels to the roof apex. Vertical arrows at the left and right edges of the panel array, each labelled "40 cm" from the edge of the panels to the edge of the roof. At the bottom row of panels, add an arrow and label showing "20 cm" from the lower edge of the panels to the eaves or bottom edge of the roof. The style should be clean and educational, with a mix of realism and schematic drawing. Background includes blue sky and green trees See more