Observing the appearance

The appearance of solar panels can be an important criterion for judging quality. If the appearance of the solar panel is not a problem, it is likely that its internal structure and materials are also good. When observing the appearance of solar panels, the following points need to be noted:;

1. Appearance of battery cells: Observe whether the surface of the battery cells is intact, and whether there are any phenomena such as chipping, missing corners, cracks, or oxidation. The integrity of the solar panel surface can reduce energy loss and improve the power generation efficiency of the solar panel.

2. Color: Observe whether the color of the solar panel is uniform and whether there is any color difference. The uniform color on the surface of the solar panel indicates that its production quality is relatively stable.

Check identification

When purchasing solar panels, it is important to check the markings on the panels. These markings can help you quickly determine the brand, model, and certification status of the solar panels for selection and comparison.

Brand identification (manufacturer or brand name of the solar panel)

Model identification (model or specification parameters of solar panels)

Certification mark (certification standards passed by solar panels, such as TUV certification, IEC certification, CE certification, etc.)

If the above markings are not present on the solar panel, special attention needs to be paid to its quality and performance. Some solar panel brands may attach labels on the surface or back to display important parameters of their products, such as voltage, current, power, etc. If these parameters are present, they can be verified by measurement to determine if they meet the performance requirements of the solar panel.

Measurement parameters

The performance of solar panels can be measured by some simple electrical parameters. When selecting a solar panel, you can judge its performance by measuring parameters such as open circuit voltage (Voc), short circuit current (Isc), maximum power point voltage (Vmp), and maximum power point current (Imp).trina solar panels