First, the type of photovoltaic modules:
Photovoltaic modules are mainly composed of solar cells (the cells are divided into polycrystalline and monocrystalline), glass, and backsheet. According to the factory level, it is divided into A, B and C components. The
Second, how to easily distinguish A, B, C components?
Application of A, B and C components:
Class A components: mainly used for ground power stations, distributed power plants, household systems, etc., with a life of more than 25 years. The price is mainly around 3 yuan/W.
Class B components: mainly used for street lamps, off-grid systems, battery cars, etc., 5-year life. This type of assembly is a Class A downgrade assembly or is produced with Class B material at prices around 2-3 yuan/W.
Class C components: mainly used in underdeveloped areas, such as remote areas, Afghanistan, the Middle East, South Africa, etc., life is unknown, the price is below 2.5 yuan / W.
Third, how to distinguish such components? The simplest distinction is through the appearance of the component.A-level battery does not appear these phenomena:
Bad appearance: stains, color differences, aluminum thorns, bulges, broken gates, nodes, pattern offsets, missing corners, chipping, notches, etc.; component appearance Poor packaging: backplane failure, cell welding, over welding, sealing Bad, scratched backplane, scratched frame, scratched glass; poorly sealed junction box.
B, C-class components how to produce?
First, in the production process, the components whose appearance and electrical performance do not reach Level A are reduced to Class B or Class C.
Second, it is a class B component that is produced directly. The appearance is basically the same. There is no way to distinguish the quality of components simply and intuitively.
Fourth, how to choose the PV module?
Look at the manufacturer. Look at the manufacturer of the component. Look at whether it is a mainstream brand in the industry or whether it is an admittance enterprise publicized by the Ministry of Industry and Information Technology of the People's Republic of China. Up to now, a total of 235 companies have been qualified for publicizing six batches. There is a saying that “Broad cool under the big tree” should be a good enterprise that the Ministry of Industry and Information Technology has reviewed and approved to the public. The quality assurance and after-sales service of the big brand components are guaranteed. Is it right to choose such a brand?
The second is to look at the base of production companies. In other words, in recent years, companies have focused their efforts on expansion or on R&D and quality. If you think about it, if there are many production bases and production companies in the same company, there are a lot of associated factories. Is it more difficult to manage? If the production base is less, it is not easy to manage and control.
The third is to look at the brand reputation. Judging from the examination of PV modules, the power generation capacity of large-brand A-class modules is basically at one level in a region. The difference in power generation is not too great. The difference between brands is mainly due to technological differences and quality differences, process differences and manufacturers’ The difference is very small. Therefore, the choice of brand depends on how after-sales service to see if there is an agency service provider, whether after-sale protection, choose a good after-sale brand that is absolutely wrong!
Four to see the price. Now from the point of view of propaganda, some agents are pursuing exorbitant prices and high prices for high-quality propaganda, but such words can still be heard. Not only do the owners need to look at quality, but they must also consider the high cost performance. Consider the power cost of the power station and consider the annual rate of investment.
Five things are useful. If you want to install photovoltaic power plants on your own roof, it is an investment nature. It is recommended to choose brand A grade components with big brands, good quality, and good service. If you temporarily use electricity for a month or two, install it in the reservoir area, factory buildings, and workshops. , Garage and other places, or used in street lights, mainly to solve temporary power problems, then you can choose to use the B-class board on the line, haha, the cheaper the better!
