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The YH-EL4 PV module Automatic EL Tester is an advanced EL Tester designed for seamless integration into a Solar Panel Production Line. It applies an external constant current stabilized power supply to the battery module and uses electroluminescence technology to perform specialized imaging on semi-finished and finished photovoltaic cell modules before lamination, after lamination, and post-packaging. The device delivers high quality imaging results on a computer display, allowing for precise detection of various Solar Panel EL Defects that are not visible to the naked eye. Customized YOHA software further enhances the clarity of these images and makes your solar panel production line more efficient.

Detect Defect Types

1. Battery Material Defects:
   Includes fragments, hidden cracks, broken grids, and contamination.

2. Welding Process Defects:
   Covers issues such as virtual welding and desoldering.

3. Mixing of Different Levels:
   Identifies inconsistencies in material quality.

Application:

This Automatic EL Tester is used for automated testing and recording of solar modules—including mono-crystalline, poly-crystalline, and thin-film types—in a Solar Panel Production Line. It evaluates performance metrics to support quality control and optimization in solar cell production, ensuring that any Solar Panel EL Defect is detected with high quality imaging.

Technical Data:

Equipment workflow

1. The solar panel placed face down with the long side facing forward into the docking station. The blocking device raised to put the modules in entry waiting status. At the same time, barcode scanning is automatically performed, and after scanning the barcode, take photo automatically

3. The system takes photos and the software automatically splices the images to display the results

4. After the display is completed, give the next level an OK or NG signal, and automatically transmit it after obtaining the signal that allows the next level to discharge.

Equipment Structure

1. This EL tester mainly consists of the following units: automatic feeding and discharging mechanism; Photography system organization; Automatic power on mechanism; Specialized software; Printing system

2. Subsystem Description

2.1 Automatic feeding and discharging mechanism

Cabinet design, can seamlessly connect with the automatic transmission line of components (height 900-1080mm), with the glass side facing downwards and the long side facing forward for horizontal entry and exit.

This device is automatic for feeding and discharging, including front and rear connecting stations (transfer waiting).

The transmission system of the front and rear material transfer platforms adopts a roller transmission method, and the internal transmission system of the equipment adopts a belt or guide rail transmission method.

2.2. Photography System Organization

The fully automatic EL tester is equivalent to a simple darkroom, avoiding direct sunlight on the camera lens. The EL defect tester uses multiple industrial cameras for shooting and splicing, and 72 packaging components are photographed without rounded corners or deformation.

2.3 Automatic power on mechanism

Before feeding, when the feeding dock is waiting for the position, a specially made fixture is installed. The electrode wire connector is manually inserted into the fixture and installed on the junction box (or other relatively fixed positions). After entering the testing position, automatic measurement is completed by using a lifting probe contact method.

This EL tester is ideally designed for an automatic solar panel production line. The automatic feeding and discharging mechanism can connect with component automatic transmission lines. The photography system organization uses multiple industrial cameras for shooting and splicing. The automatic power on mechanism completes measurement via a lifting probe contact method.

Our Services:



About Us:

Yoha Solar is a high-tech enterprise dedicated to the research, development, manufacturing, sales, and after-sales service of serial photoelectric automation equipment.
15+ Years Engaged In Solar
300+ Customers Worldwide


Our company primarily serves the solar photovoltaic industry and holds its own import and export rights. We have developed a range of independent R&D equipment.

Main Machinery:Fiber Laser Cutting Machine
Solar cell sorting Machine
Solar Cell IV tester
EL defect tester
EL and AOI Appearance Tester
Solar Panel Production Line
Other Auxiliary Machines