Study of Constructions for the Photovoltaic System to Increase the Economic Efficiency of Energy Generation

In this paper, we focus on studying the efficiency promoting of power generation in the application of a domestic large-scale Photovoltaic System (PV). There are three categories of construction for photovoltaic system. One is set up the PV module at the housetop, another one is set up the PV module as building-integrated Photovoltaics (BIPV), last one is set up the PV module within up to two applications which is call building-applied Photovoltaics (BAPV). We made the analysis for the three constructions, and found out that increasing the economic efficiency of Photovoltaic System must lie with stature of the PV construction. Especially, the PV system is set up on the housetop. There are only two to three hours in high efficiency generation during the whole shining day. It is a great energy loss to solar system. Authors try to make the highest economic efficiency solution for PV system.