PV grid and grid-connected PV system is directly connected to the public grid after the DC generated through solar modules and inverter converts the AC mains line with requirements. With battery and can be divided into grid systems without batteries. And power generation system with battery has schedulability can be incorporated into or out of the grid needed household solar power, but also has the function of standby power when the grid power failure emergency power for some reason. Grid-connected PV systems with battery often installed in residential buildings; without the battery and power generation systems do not have to scheduling and standby power function, usually installed in larger systems. And there is a centralized network of large-scale photovoltaic grid-connected photovoltaic power plants are generally national power plants, the main feature is the power can be transported directly to the grid solar power to join the unified deployment of grid power to the user. However, this power plant investment, long construction period, large area solar power costs, but also not much development. The decentralized small-scale grid-connected PV, especially BIPV photovoltaic power generation, due to the small investment to build fast, small footprint, policy support large, etc., is the mainstream of photovoltaic grid. Grid-connected PV systems combined with the building and the building combined photovoltaic grid is an important application of the current form of distributed photovoltaic solar power, technology progressed very quickly, mainly in building integrated photovoltaic installation and construction electrical design, according to different building integrated photovoltaic installation can be built into an integrated building additional solar power and photovoltaic equipment manufacturers, day-giant energy technology (certified), Huangpi solar power by day-giant Wuhan Science and Technology Co., Ltd. available. Wuhan Tian Hui Ju Technology Co., Ltd. (www.thjnkj.com) is a leader in Wuhan, energy-saving equipment, over the years, the company is implementing the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customer needs. In the day-giant energy technology leadership with the staff warmly welcome all inquiries negotiations to create day-technology giant to a better future.