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 power grid as needed, but also has the function of solar backup power when the grid can be an emergency power outage for any 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 by grid unified deployment of power to the user. However, this power plant investment, long construction period, large area, yet there is not much development. The decentralized small-scale grid-connected photovoltaic solar power to join, 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. Photovoltaic systems are composed of photovoltaic power generation system consists of solar phalanx cost of solar power, solar power batteries Which is good, charge controller, inverter, AC power distribution cabinets, solar tracking control system and other equipment. Solar power agency, Huangpi solar power, day-giant technology provided by the Wuhan days Hui Technology Co., Ltd. giant. Wuhan Tian Hui Ju Technology Co., Ltd. (www.thjnkj.com) strong, credible, in Wuhan, Hubei and other energy-saving equipment industry has accumulated a large number of loyal customers. The company better work attitude and constantly improving innovative ideas will lead the day-giant into the brilliant technology and you work for a better future!