2025.08.16
Solar panels are the core material of photovoltaic systems. The quality of panels on the market varies greatly. If you don't have professional equipment and expertise, how can you distinguish the quality of solar panels?
1. Look at the color. Generally speaking, both monocrystalline and polycrystalline silicon panels have a uniform blue color, a light blue or sky blue. If the panel is dark or uneven, it indicates poor workmanship.
2. Look at the surface. The tempered glass surface of the panel should be smooth and free of foreign matter. Some small manufacturers, in order to increase production speed, do not clean the silicone that drips onto the tempered glass. Failure to clean the silicone will affect power generation efficiency.
3. Look at the cell. Each cell on the panel is complete and cut from a single piece. However, many unregulated manufacturers use broken cells to splice together seemingly complete cells and then weld them together. Observe for any signs of cutting. This method carries significant risks. While it may not be obvious initially, the spliced cells can easily break again later, affecting the function of the entire panel. Of course, this is difficult to detect with the naked eye.
4. Inspect the back to see if it withstands pressure and whether there are any unevenness, such as bubbles or wrinkles, after the pressure is applied.
5. Inspect the frame. Due to the low barrier to entry in the solar panel industry, many small manufacturers use manual framing. Manual framing can result in uneven contact and uneven shape, which significantly reduces the strength of the frame. Aluminum alloy frames are now commonly used.
6. Inspect the silicone to see if it is evenly distributed around the back and has penetrated tightly into the gap between the backsheet and the frame.
7. Carefully inspect the cell soldering for any leaks. Also, check for regular cell arrangement.
8. Inspect the junction box. Finally, check if the junction box is secure and the cover fits securely and tightly. Check if the wiring cable lock rotates freely and can be tightened.
9. Inspect the price. If all of the above are difficult to determine, the safest bet is to compare prices. Domestic solar panel prices fluctuate. While not absolute, there's a rough range. If a manufacturer's price is significantly lower than the market price, it's worth carefully evaluating. Finally, the manufacturer must provide relevant panel certifications and qualification documents.
In summary, there are many key points to consider when controlling solar panel quality, and we must carefully examine the subtleties. The above points address how ordinary users can visually assess the quality of solar panels without specialized equipment or expertise. However, some quality issues cannot be observed visually or may only become apparent after a period of operation. Only professional inspection can identify them promptly.
Keywords：
Sun Earth Solar, Ningbo Sun Earth, Sun-Earth, Sun Earth, solar panels
