The solar panel EL tester is a professional device for detecting hidden cracks and quality of solar panels. It can be placed in front of the laminator to detect whether there are hidden cracks after string welding, and it can also be placed behind the laminator to detect whether there are hidden cracks and quality problems after lamination. It is an essential equipment for the production of solar panels. Our equipment is simple and easy to operate, and can be used both online and offline. It is of moderate size and convenient to place.