What is the cause of the photovoltaic power station components don't match

Generally, photovoltaic modules attenuation is 5%, the first year back to no more than a year 0. Down does not allow more than 20% 8%, 25 years. In a recent set of string type and centralized solution speculative one argument: due to component mismatch, including and attenuation of the products are not

in general, the attenuation of 5% in the first year of photovoltaic modules, in the second year of less than 0. No more than 20% 8%, 25 years. In recent cluster and centralized scheme that there is an argument: because components don't match, including plant products and attenuation of the inconsistencies, the potential loss is 3 - to generate electricity More than 5%, can be achieved by MPPT cluster solution to recover. There are many influence factors in power generation, components is one of them. However, many MPPT scheme can reduce the loss and can reduce how much is controversial, and in many cases are required to confirm. Photovoltaic module production is the most competitive in the global pv industry one of the photovoltaic sector. Most of the world's photovoltaic components are produced in China. Photovoltaic modules is a typical large-scale assembly line production mode, in this kind of standardization production mode, especially the consistency has been effectively guarantee product quality and control. It is hard to imagine the whole assembly line, the standardization of highly mechanized production has 3 - products Be 5%, this is the most critical power generation efficiency product parameters. According to the current practical application, the component of the actual discrete about tens of thousands of mismatch and attenuation, instead of 3 - The degree of 5%. Many well-known suppliers in China are considered and improves the degree of standardization of the components in its life cycle and attenuation, which is associated with the raw materials of enterprises to choose. Industry experts believe that the main reason for the power plant parts don't match is not the unit itself, but a shadow. The shade in the urban environment, particularly prominent in the distributed power station, mainly by the influence of fixed shadow around the buildings, trees, etc. For the roof of the position is not ideal power station, because every day the periodic shade, component does not match, May 3 - loss 5% of the electricity. In this more sheltered environment in the design of power station, shadow, periodic and components placed location is important to consider the design of the factors. Group of MPPT series solution features can give full play to the advantages of its flexibility. The ground station in the desert, mainly from the shadows of the clouds. The shadow has influence to the power, but the influence degree is low, this is not a major consideration in plant design. If investment costs are basically the same, and shall not affect the power grid friendly and late plant operation maintenance, to a certain extent, to increase the MPPT number of solution will help to generate electricity. If there is a periodic mass shade desert ground station, is bound to be on the plant site selection and layout of the parts design errors. On this basis, the primary and secondary upside down to discuss the advantages and disadvantages of access scheme. We have learned, since 2009, the domestic photovoltaic power station since large-scale development, photovoltaic power station has been following the lighting good, the location of the shade less environmental standards. The size of the new photovoltaic power station in the future, will continue to increase year by year. The ideal location is limited, and even more complex have sheltered environment may also become the target of power plant development. Expert proposal, lighting and shading is not the ideal project should be designed according to the principle of scientific design, and alternative combinations according to actual situation, to ensure the return on investment of the project.