Photovoltaic curtain wall, photovoltaic curtain wall should meet the requirements of BIPV: in addition to power generation function, it should also meet all functional requirements of curtain wall, including external maintenance, transparency, mechanics, aesthetics, safety and so on. High component cost and low photovoltaic performance; Design, construction and installation at the same time with the building, the progress of photovoltaic system is restricted by the overall progress of the building; The photovoltaic array deviates from the optimal installation angle and the output power is low; High power generation cost; Enhance the social value of architecture and bring the effect of green concept.