Nowadays, there are many manufacturers producing discount mono solar panels, and some inferior products are also mixed in. It is really not easy to choose good quality mono solar panels, so how to distinguish the quality of discount mono solar panels?
1. Look at the battery sheet
In order to save costs, many informal manufacturers assemble damaged cells to form a seemingly complete cell. In fact, there is a great risk. The problem may not be seen at the beginning, but it is easy to cause breakage after a long time, which affects use of discount mono solar panels.
2. Look at the back
The back of the discount mono solar panels should be marked with technical parameters, such as: open circuit voltage, short circuit current, working voltage, etc. Secondly, it depends on the pressure effect on the back of the solar panel. If there are traces of bubbles and wrinkles after pressure , then this solar panel is not qualified.
3. Look at the junction box
The junction box is a kind of connector of the solar cell module. The main function of the solar photovoltaic junction box is to export the electric energy produced by the solar cell module through the cable. Whether the junction box is firm is also related to the working efficiency of the discount mono solar panels. The junction box cover should be firmly and tightly attached to the junction box, and the outgoing wire lock should be rotated freely and tightened.