Building component for externally-hung photovoltaic curtain wall

The utility model discloses a building component for an externally-hung photovoltaic curtain wall, which comprises an externally-hung building component matched with the photovoltaic curtain wall, the right side of the photovoltaic curtain wall is fixedly connected with a rectangular clamping sleeve with an opening at the bottom, and the top of the left side of the photovoltaic curtain wall is fixedly adhered with an illumination sensor through a double faced adhesive tape. Through the arrangement mode that the elastic rubber blocks are not integrally attached and clamped to the interior of the rectangular clamping sleeve, the low-photovoltaic curtain wall can be elastically damped and buffered in strong wind, the damage risk of the low-photovoltaic curtain wall is reduced, and through the arrangement of an illumination sensor, an electric telescopic rod, a controller, an inclined roll-out driving assembly, a rotary supporting assembly and a supporting plate, the illumination intensity of the low-photovoltaic