This document discusses building integrated photovoltaics (BIPV). It begins by noting that buildings account for 36% of global energy consumption and renewables only supply 24% of building energy in cities. It then discusses how BIPV works by integrating photovoltaic modules into the building envelope, either as an additional component or replacing conventional materials. The types of BIPV include facades, roofing, and glazing. Benefits include shading, insulation, and aesthetics to help create greener cities. However, higher costs and difficulty retrofitting are disadvantages. Trends include prefabricated and colored/patterned facade BIPV as well as solar glazing.