Panel comprising: - an upper transverse edge including an upper overlap area intended to be covered by an adjacent panel, - a lower transverse edge including a lower overlap area intended to cover an adjacent panel, - a first longitudinal edge including a first longitudinal rib, - a central part extending from the first longitudinal rib, comprising: ∘ successively: ▪ a first base plate of width L13, ▪ at least one projecting part comprising an upper plate of height H16 and width L16, covered with photovoltaic cells and two side web plates (17, 17') extending from the upper plate on both sides thereof and downward at an angle β with plane P and ▪ a second base plate of width L15, the first base plate and the second base plate being located in a plane P ∘ a recess located in the part of the upper plate located in the upper overlap area and comprising an opening in which an electrical junction box is mounted, ∘ a perforation in the lower overlap area for passing through an electrical connector, - a second longitudinal edge extending from central part and comprising a second longitudinal rib, the first longitudinal rib and the second longitudinal rib having shapes enabling them to overlap. - an upper transverse edge including an upper overlap area intended to be covered by an adjacent panel, - a lower transverse edge including a lower overlap area intended to cover an adjacent panel, - a first longitudinal edge including a first longitudinal rib, - a central part extending from the first longitudinal rib, comprising: ∘ successively: ▪ a first base plate of width L13, ▪ at least one projecting part comprising an upper plate of height H16 and width L16, covered with photovoltaic cells and two side web plates (17, 17') extending from the upper plate on both sides thereof and downward at an angle β with plane P and ▪ a second base plate of width L15, the first base plate and the second base plate being located in a plane P ∘ a recess located in the part of the upper plate located in the upper overlap area and comprising an opening in which an electrical junction box is mounted, ∘ a perforation in the lower overlap area for passing through an electrical connector, ∘ successively: ▪ a first base plate of width L13, ▪ at least one projecting part comprising an upper plate of height H16 and width L16, covered with photovoltaic cells and two side web plates (17, 17') extending from the upper plate on both sides thereof and downward at an angle β with plane P and ▪ a second base plate of width L15, the first base plate and the second base plate being located in a plane P ▪ a first base plate of width L13, ▪ at least one projecting part comprising an upper plate of height H16 and width L16, covered with photovoltaic cells and two side web plates (17, 17') extending from the upper plate on both sides thereof and downward at an angle β with plane P and ▪ a second base plate of width L15, the first base plate and the second base plate being located in a plane P ∘ a recess located in the part of the upper plate located in the upper overlap area and comprising an opening in which an electrical junction box is mounted, ∘ a perforation in the lower overlap area for passing through an electrical connector, - a second longitudinal edge extending from central part and comprising a second longitudinal rib, the first longitudinal rib and the second longitudinal rib having shapes enabling them to overlap.