Let me introduce you to EL tester

The Electroluminescence Tester is a testing device used for evaluating the quality of solar cells. It evaluates the quality and performance of solar cells by detecting their electronic luminescence phenomenon. In EL testing, the battery cells emit visible light when powered on, and the EL tester converts these luminescence phenomena into images or videos for analysis. By analyzing and comparing EL images or videos, it is possible to determine whether there are defects or damages in solar cells.

The EL tester can help detect hot spots, cracks, welding defects, and other issues in solar cells, as well as check the uniformity and power output of the cells. Through EL testing, problem solar cells can be detected and eliminated in a timely manner, improving the quality and performance of solar cell modules.

EL testers typically consist of optical microscopes, cameras, light sources, image processing software, and other components. During the testing process, the battery cells will be placed in a dark environment, excited to emit light by applying current, and the emission image or video will be recorded. Then use image processing software to analyze and obtain the quality evaluation results of the battery cells.

EL testers are widely used in the solar energy industry, which can help improve the quality and reliability of solar cell modules. It can be used for quality control on production lines, as well as for performance evaluation of battery cells in research and development and laboratories.