Do you know there are A B C grade for solar cell?

The grades of solar cell modules are generally divided into A grade, B grade, and C grade, and A grade modules can be divided into A+ and A- grades. Different grades of solar cell modules have a certain cost gap. We?will briefly introduce the three grades of A, B and C:

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A-grade modules: A-grade is the highest quality grade of cells, and the modules can be used perfectly.

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B-level modules: B-level cells are slightly lower than A-level cells, and the modules can be downgraded.

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C-level modules: C-level cells are those with serious bad appearance and missing corners. These cells can be cut into small modules and supplied to customers with special needs.

For manufacturers, the following three points can be used to detect whether the solar cells meet the usage standards:

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Before the case is encapsulated

Visual inspection of battery samples:

The color of the upper surface of the battery should be uniform, no mechanical damage, and no oxidation spots on the solder joints. The upper electrode of the battery and the bottom electrode of the battery should not fall off. The anti-reflection coating should not peel or discolor. Use vernier calipers and micrometers to measure the dimensions and thickness of battery samples, which should conform to product production standards.

After the shell is encapsulated

Physical size check:

Check the physical characteristics and size requirements of the standard battery, such as the distance between the upper surface of the standard battery and the encapsulation glass of the casing, and the size of the encapsulation casing, which conform to the actual product standards.

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Appearance defect inspection:

After the standard battery is packaged, the appearance defect inspection is carried out, focusing on checking whether the material has internal reflection, and the defects that may be caused during the packaging process, such as air bubbles, delamination, unclear marking, etc. In general, bubbles and delamination defects are the most critical.

For consumers, the quality of solar cells can be judged from the following four points:

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Look at the surface of the module: Check whether the surface of the module is smooth and meticulous. Low-grade products are relatively rough, and the residual silica gel on the surface will reduce the power generation efficiency of the battery board.

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Look at the battery slices: Check the battery slices for broken edges and cracks. Low-level components are mostly spliced with broken cells, which have great potential safety hazards and extremely low power generation efficiency.

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Look at the component frame: high-grade components are processed by machine framing, and the frame is neat and sturdy, while low-level components are generally processed by manual framing, which has problems such as frame deformation and instability.

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Look at the silica gel: Check whether the silica gel is evenly distributed around the back of the module and whether it penetrates tightly into the gap between the backplane and the frame. Low-level components are generally shoddy and easy to identify.

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Of course, for consumers, it is also necessary to confirm whether the module products are from regular brand manufacturers, and carefully check and check the warranty contract, invoice, etc. These details not only determine the quality of solar cells, but also determine the after-sales service and 25-year warranty service .