In recent years, Building Integrated Photovoltaic (BIPV) system has been becoming one of most important application of solar energy. Heat is the key of the BIPV design. If the temperature of photovoltaic modules is too high, it will affect the efficiency of solar cells, the structure performance of the components and service life. This paper present a photoelectric-thermoelectric (PV-TV) model which can collect heat from the solar panels so that to reduce its surface temperature, and then to generate electricity by using of temperature difference technology and devices. The model presented in this paper provides designers a new concept in BIPV design.