When choosing which solar panel best suits your needs, you should consider what problems choosing a low-quality panel may entail.
The importance of hot spots
Hot spots are a major enemy of solar panels. These spots affect certain areas of the solar panel, leading to a high temperature that directly affects the efficiency, power output and a large increase in the deterioration of the solar panel. Hot spots arise due to bad methods when manufacturing the solar panel, that is where hot spots appear. Part of the energy produced by the cell is dissipated as heat in a localized area and forms the hot spot.
The worst part of hot spots is that they are unstable and usually intensify to the point of negating the entire performance of the solar panel. The appearance of hot spots is due to the low quality of the materials used in the manufacture of the solar cell, this has a greater wear in their daily use and therefore a shorter life. The consequence of this is to have to renew our installations before.
Some companies do not optimize the welding properly, they do not let the welding reach the optimum temperature point because of time saving, which causes the appearance of hot spots. These hot spots derive in a bad operation of the solar panel and end up spoiling it.
Low quality materials
On the other hand, the deterioration of the Tedlar is the rear cover that solar panels have (PVC or polyvinyl fluoride) which acts as a waterproofing for the solar cell. Many manufacturers use low quality materials to reduce the cost, which ends up in filtrations and in the oxidation of the solar panel. Another way to save money is to use a poor-quality EVA. This produces a yellowing of the EVA that over time degrades and causes a drop in production on the solar panel.
Delamination of the cells
Following with other problems, the delamination of the cells integrated in the solar panel. It is due to a bad manufacturing of the solar panel laminate and in the end, it will leave it unusable. It is a quite common failure in Asian photovoltaic panels of medium-low quality, trying to reduce the time of creation of this laminate by sacrificing the quality of it.
Bypass diodes
Another disadvantage of low-quality solar panels is having problems with Bypass diodes. It is important to know the type of bypass diodes used in the solar panel junction box. The best option is the military ones, since they support better the high temperatures. They have to be well encapsulated with the protective silicone. There are cases in which, due to the use of a bad quality diode, they deteriorate and leave the solar panel unusable.
Finally, entrepreneurs change the brand of the company to avoid guarantees. Many solar panel manufacturing companies, usually Asian, change the company name from time to time to avoid having to be responsible for a warranty on their products. If the company no longer exists, we cannot claim our product warranty.