An even rhythm on a photovoltaic roof does not require every element to generate energy. In a steel system, active panels can be combined with passive covering of a matching character. This makes the roof slope look like a planned whole. The effect is determined by real widths, connections and terminations, not by filling the roof with black in the visualisation alone. The layout should be developed in parallel with an assessment of solar exposure and the home's energy needs. It is the repeatability of the divisions and their relationship to the whole building form. In standing seam covering, the longitudinal lines that lead the eye along the slope are important. A regular layout can give the building a calm character. However, it does not have to mean perfect symmetry in every place, especially around chimneys, windows and irregular edges.

Window positions and photovoltaic roof layouts should be considered together. This allows the roof slope to look calm while the interior retains the necessary light and comfort. Steel BIPV makes it possible to combine active fields with passive zones at the openings. This does not mean every window must be subordinated to the modules. A good design seeks harmony between the function of the house, the actual system formats and a clear roof pattern. First, the needs of the rooms and the possible roof geometry must be known. Windows serve the occupants, so their position should not result solely from the wish to add another panel. At the same time, it is worth checking BIPV formats early. This avoids a situation where a fixed opening layout leaves difficult, random fragments of the roof slope.