The sun panels commonly used in China are polycarbonate hollow panels, also known as PC panels. According to Fang Zhenbang, the original dishes for the production of sun panels should be new materials. However, some domestic sun plate manufacturers have added some old materials to the new materials in order to save production costs. Some enterprises even use old materials completely. Due to the high content of impurities and dust in the old materials and low transparency, the sun-filled panels of the old materials are much more transparent and durable than the sun panels that completely use the new materials.
How to identify whether the sun board is doped with old materials? Mainly to see if there are impurities in the sun plate, such as black spots on the sun plate, crystal points indicate that it contains impurities, the more impurities, indicating the more the old material content. Good sun panels must be clean and translucent.
By examining the fluidity of the sunlight plate melt, it can also be judged whether the material is good or bad.
Since the molecular chain of the carbonate resin is long, the molecular structure is destroyed by repeated high-temperature melting, and the macromolecule is degraded into small molecules. The old material is melted at a high temperature, and its molecular chain is broken, so that the fluidity is increased. Therefore, in theory, the better the fluidity in the molten state, the worse the quality. But at the same time, Fang Zhenbang also admitted that although this method is easy to understand in theory, it still has some difficulty in operation. Users who do not have the test conditions can send the sun slab material to a professional agency for inspection.
In addition, the standing ribs of the sun slab can be observed, and the ribs are thick and straight for a good quality sun slab. If the ribs are thin and the pressure is bent at one pressure, the quality of the board is not good.
UV layer, anti-fog layer can be self-identified
Ultraviolet light is a key factor in the aging of panels, and more and more producers are now choosing co-extruded UV-resistant solar panels. “Now many manufacturers are flaunting their products to squeeze the UV layer, but whether the UV layer can really play a role can not be considered by consumers. Good sunshine board
The UV layer can not be measured by the thickness alone, but also depends on the uniformity of co-extrusion. It is necessary to select a solar panel with a thick UV layer and good uniformity. â€
For the market, some did not add any UV material at all, but pretending to coextrus
The phenomenon of UV layer sun panels, Fang Zhenbang tells everyone to identify a small trick: take a small piece of sunlight board, place it horizontally, from the cross-section to see if there will be a surface in blue, if it indicates its co-extrusion There is a UV layer, and if blue is not present, the sheet may not have a coextruded UV layer.
Nowadays, with the development of solar panel technology, anti-fog drip panels have appeared in recent years. The method of identifying their quality is very simple. Just take a cup of hot water under the board, if the condensation water is under the board. The formation of droplets or water droplets on the surface indicates that the anti-fog effect is not good.
Don't be fooled by the illusion of warranty
With the increasingly fierce competition in the solar panel industry, many manufacturers have shown the "warranty" sign, and many users will be wary of buying products when they see the "warranty." In this regard, this is also a misunderstanding of the user on the sun board. “It’s not good to look at the warranty period. What’s more important is to look at the content of the warranty.†Remind the user, “Some manufacturers say that their products are guaranteed for 10 years, but they do not specify the details of the warranty. It is to guarantee the sunshine board within 10 years. Is it not damaged, or is the effect of the warranty within 10 years?†Further explanation, two important indicators for measuring the degree of aging of the solar panel are the change of the yellowing index and the degree of decrease of the transmittance. When purchasing, the user should ask the manufacturer clearly: During the warranty period, the yellowing index and the transmittance of the solar panel are reduced. For example, in China, a high-quality solar panel enterprise stipulates that its yellowing index will not change by more than 10 during the 10-year warranty period, and the light transmittance will not fall by more than 6%.
Installation and construction must not be negligent
Choosing a good quality sun board is only a critical first step, and the installation of the sun board is also critical. Even if you have a high-quality sun board, if you install it incorrectly, you will only get half the effort. Fang Zhenbang believes that edge sealing and punching are the key factors that determine the quality of solar panel installation technology. First of all, we must do a good job of sealing. If the sealing is bad, it will not only lead to the dust and moisture in the pores of the sun board, but also the long moss, which will reduce the light transmittance, and it will also increase the air mobility and affect the greenhouse. Insulation effect. In the hole punching the sun board, pay attention to the strength and verticality of the hole punching. If the force is too large or the nail is too strong, it is easy to make the gap of the sun plate into the water.
Finally, the rubber pad also plays a huge role in the installation. It is recommended to use the EPDM pad, which has the characteristics of aging resistance and corrosion resistance. The rubber pad with bad material will corrode the sun plate, resulting in local yellowing of the sun plate. , cracking phenomenon, affecting the use effect.
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