Why the same capacity of photovoltaic power station in the system next to my house

From the roof installed solar power station of their own friends, must be concerned about is the problem of photovoltaic power generation. But due to various reasons, every household electricity is not the same. Probably a lot of friends have such doubt, why we

photovoltaic power station was installed on the roof of my friends must be very worried about photovoltaic power station power generation. However, due to various reasons, the capacity of each family is different. Maybe a lot of friends have such problem, why I installed the same capacity power station in the next room, less electricity? Why our power stations in five years will reduce capacity? Pre-installed: 1. Solar energy resources in the photovoltaic power station actual installed capacity of a certain case, the output of pv system is decided by the intensity of solar radiation ( Positive correlation between electricity and solar radiation) 。 Photovoltaic system utilization rate is only about 10% of solar radiation, this directly lead to the increase of photovoltaic power generation. Solar radiation is closely related to the weather, so it decided to solar radiation, photovoltaic solar radiation decision. The three complement each other. 2. Light plant if photovoltaic power station is located at solar resource-poor areas, after completion of the photovoltaic power station generating capacity will reach the expected value. 3. Component installation method in the same area, cant Angle leads to different components of radiation is different. Therefore, by adjusting the Angle panels ( Stents with fixed adjustable) Or increase the tracking device ( Stents using tracking) To increase the radiation on the inclined plane. Photovoltaic phalanx installation Angle has a great influence on the photovoltaic power generation, because receives the installation Angle of solar radiation is very large. Installation Angle will change according to the region of latitude and longitude. 4. Inverter capacity than inverter capacity than it is to point to the rated power of the inverter and the ratio of the capacity of the pv module. As a result of the pv module power passed to the inverter, there will be many links between cause loss reduction, and equipment such as inverters, box-type transformer cannot be run at full capacity, most of the time, therefore, the capacity of the pv modules should be slightly greater than the rated capacity of inverter. According to experience, the solar energy resources better region, photovoltaic modules: inverter = 1. 2:1 ratio is a good design. 5. Design, procurement and construction control of photovoltaic power station design, procurement and construction must be strictly controlled in each link, otherwise any link short board effect caused by the late to plant operation maintenance bring great difficulty, and even cause the failure of operation maintenance. This will seriously affect the performance of the whole plant power generation system. The late operation and maintenance: 1. Components cover components including dust shield, shielding, grass, trees, snow panels and other buildings. Receive radiation shielding will reduce the components, and affect components of cooling, thus resulting in a decline in the power output of the components, and could lead to a hot spot. Plant dust losses could reach 6%, so regular cleaning photovoltaic components is very important. The northwest region in our country, because of dust weather, photovoltaic array of washing is especially important and frequent. In China's southern region, however, because of increased rainfall and rain water from the washing, the cleanness of pv arrays could be slightly less.