Solar Panel is the core material of photovoltaic system. The quality of solar panels on the market is also uneven. If there is no professional equipment and technical expertise for the time being, how should we distinguish the quality of solar panels?
1 look at the color
Generally speaking, monocrystalline silicon and polycrystalline silicon solar panels have blue appearance, and they are uniformly light blue or sky blue. If the color of the panel is dark and the color is different, then the workmanship is definitely not meticulous.
2 Look at the surface
The tempered glass surface of the battery board should be flat and free of foreign matter. In order to increase the production speed, some small manufacturers do not clean the silicone gel that has dripped on the surface of tempered glass. If the silicone is not cleaned, it will affect the power generation efficiency.
3 Look at the battery
Each of the battery slices on the battery board is complete, and is formed by cutting the whole body. However, many irregular manufacturers on the market spliced with broken cells to form seemingly complete cells for welding. When we observe, we will see if there are any traces of cutting. There are great risks in this way. The initial stage may not be obvious, but the spliced battery is easy to be disconnected again later, which affects the use of the entire battery board. Of course, this situation is hard to find with the naked eye.
4 Look at the back
Look at the quality of the back pressure, whether there are unevenness after the pressure, such as bubbles, wrinkles and the like.
5 Look at the border
Due to the low barrier to entry in the solar panel industry, many small manufacturers use manual framing. Due to the uneven framing strength of each frame, the close contact of the frame is not the same, and the shape is not strictly rectangular. The degree is also greatly reduced. Now the aluminum alloy frame is generally used.
6 look at silicone
See if the silica gel is evenly distributed around the back, and see if it tightly penetrates into the gap between the back plate and the frame.
Carefully observe whether there is a leakage phenomenon in the string welding of the cells. At the same time, it also depends on whether the arrangement of battery cells is regular.
8 look at the junction box
Finally, see if the junction box is firm and whether the junction box cover can be firmly and tightly attached to the junction box; see if the wire and cable lock can rotate freely and can be tightened.
9 see prices
If the above is difficult to distinguish. The most safe way is to compare prices. Domestic panel prices are fluctuating, although not absolute, but there will be a rough range. If the price given by the manufacturer is much lower than the market price, then we must carefully distinguish. Finally, it is necessary for the manufacturer to provide the corresponding battery board qualification certificate and qualification documents.
In summary, there are many key points in the quality control of solar panels, and we have to judge the quality from the subtleties. The above points are only for how ordinary users can judge the quality of solar panels by appearance without professional equipment and professionals. However, some quality problems cannot be observed by the naked eye, or they will only show up after a period of operation. Only by relying on professional means can we discover in time. In order to protect your rights and interests from being damaged, please be sure to choose a professional testing agency for inspection.
The actual use locations of photovoltaic power plants are wide, and the environmental conditions are diverse. The accelerated environmental aging test has become an indispensable part in the evaluation and testing of photovoltaic modules and their raw and auxiliary materials. To simulate the outdoor environment, a variety of accelerated aging tests have been developed on the market, such as damp heat test, wet freeze test, thermal cycle test, ultraviolet test, etc., but one of the more typical types is the desert area, which has large sand and temperature changes At present, domestic laboratories cannot basically simulate it.
