The present invention provides a building exterior cladding panel. The panel includes an upper overlap area, a lower overlap area, and a central part covered by at least one photovoltaic module. A perforation is located in the lower overlap area and traversed by an electrical cable connecting one of two electrical poles of the photovoltaic module to an electrical plug located on the reverse side of the panel in the lower overlap area. An opening is located in the upper overlap area, into which is inserted an electrical junction box connected to another electrical pole of the photovoltaic module by an electrical cable. The junction box includes: a base, a lateral wall surrounding the base and extending perpendicular to it, the lateral wall includes, on its external surface, a peripheral shoulder to hold the box in place in the opening, a cable lead, situated in the part of the junction box located above the peripheral shoulder to connect to the electrical junction box to the other electrical pole of the photovoltaic module, an internal cavity delimited by the base and the wall, including an electrical terminal with an axis perpendicular to the base and a movable electrical switch. The invention further provides an associated electrical junction box.