About 60 percent of photovoltaic power plant components are used. It can be seen that the quality of the plant plays a key role in the quality of the power plant. The price of components on the market is basically 2-4 dollars a watt. Why does the price of components have such a difference? I will give you an analysis of the two-dollar and four-dollar products today.
The components are mainly composed of a battery cell (the cell is divided into polycrystalline and single crystal), glass, and a back plate. , divided into A, B, C components.
Crystal silicon cell production process
The production process of components is basically raw material procurement, storage, and production. The key is automatic welding and pressure. The key is the EL test, which can be packaged into the library.
Just made a classification of the components. Now what can be used for A, B and C? Class A uses ground-level large-scale power plants, grid-connected distributed, high-network base stations, and the product has a life expectancy of more than 25 years and sells for 3.6-4 yuan.
Class B is used to incorporate grid lights, residential grid systems, and the grid-connected systems of the developed countries of the Ministry of Solar Energy Industry. This product has a life expectancy of about 5 years and a price of about 3 yuan.
Class C is used for underutilized areas, such as remote areas, Afghanistan, the Middle East, South Africa, etc., life expectancy is unknown, priced at 2.5 yuan.
The main material of the solar module: the battery. Materials: 1, tempered glass, EVA film. 3, backplane. 4, junction boxes and so on.
Solar module classification
First, here is a high-end product. The basic is about 3.5, first-line manufacturers in 3.6-3.7 yuan per watt. There are A and B films here. Tempered glass is 28-32. EVA film is in 8.5-9.2, backplane is 18-25. The junction box is 25 or so. The ribbon is about 40-80 kg.
Second, the mid-range products. The cost price is around 2.7 yuan. Battery slice 1.85. Tempered glass 22. EVA5-6 square. Backplane 8-10 square feet. Junction box 18. The ribbon 80 is left and right. Aluminum profiles are around 55. Silicone is around 12.
Third, low-end products, the cost price is 2 yuan. Cell 1.2; toughened glass 22 square; EVA5-8 square; backplane 8-10 square. The junction box 13 is left and right; the ribbon is about 40-80. Aluminum profile 43 or so.
If you want to buy cheap components on the market, you can let third parties help us check on Baidu. They are all very professional. The cost of testing is based on the size of the project. If the project is small and you can't ask for a third party, you can see that the tray ID has the bar code of the component, take a picture, call the factory, and ask what the component is and understand.
If you want to go to the module factory to buy production, pay attention to several points: 1, the factory's BOM list. 2, appearance standards and EL standards. 3, detection of constant temperature and humidity warehouse. 4, power tester and target. 5, power tester and all data.
It is very important to check the constant temperature and humidity warehouse. The constant temperature is 25 degrees and the constant humidity is <75.
Power tester and target. It is an AV test. The component is how many watts it can test. Annual inspections are required. There is also a standard version that checks if it is valid for 6 months.
Power test and EL test. After the tester and target are qualified, the components tested at constant temperature 25 are the most accurate.
General 1KW single crystal power generation = 1KW
The conventional peak power identification of the component will not be less than 260W, which is the most common identifier.
The efficiency of component conversion, how many people say can be done? He is just a formula. Standard radiation 1KW per square. Component power ÷ component area = conversion rate.
The general use of the battery is higher than the power of the module, because the area per square conversion, the battery has a gap on each, the overall conversion rate is pulled down. Instead of making the battery pack as a whole, it is low. The number of watts per square metre is not the same as what the people ask us and what our professionals ask. But how much money per square? How much electricity can be generated per square? The 320W component is 164.9 watts and the peak is 1.649 kWh.
Component power attenuation, single crystal, polycrystalline conversion rate can not be lower than 15.5% and 16%, which is not allowed by the state and the network. Polycrystalline components cannot exceed 11.5% and single crystals are 16%. We often say that it cannot be higher than 0.7% each year. It is an expired type, high in the first year, and relatively stable each year. Without waiting until 20 years later, the second can be detected and it can be ruled by the component factory.
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Tianjin Jinji Optoelectronic Technology Co., Ltd. , https://www.tjjjgd.com