Table 4: The definition of the key factors of BIPV development.

Key factor Definition Insulation Block thermal radiation heat from the sun and reduce indoor heat loads Daylight penetration Increase PV module light penetration and reduce interior lighting power demands Artistic visual PV fusion of the exterior of a building improves architectural aesthetics Antistrong wind and rain Resistant to strong wind and rain, thereby increasing building security Antiearthquake Resistant to earthquakes, thereby increasing building security Fireproof Resistant to fire, avoiding fire spreading from inside a building to adjacent buildings and avoiding external fires spreading inside National technical building regulations Must comply with national standards Compliance with building rules Must comply with construction technique rules Compliance with construction material tests Must comply with specifications for inspection and testing