As the core unit of photovoltaic power generation systems, photovoltaic modules are prone to internal defects that cannot be recognized by the naked eye during production, transportation, installation, and long-term outdoor operation. Problems such as hidden cracks, broken grids, virtual welding, PID decay, and fragments will not immediately appear as appearance abnormalities, but will continue to reduce the power generation capacity of the modules. In serious cases, it may trigger hot spot fires, bringing safety hazards and economic losses to the power station. EL electroluminescence detection is currently recognized as a non-destructive testing method for internal defects of components in the industry. Traditional desktop EL equipment is limited to factory darkroom environments, and old portable devices have shortcomings such as difficult focusing, blurry imaging, and cumbersome operation, making it difficult to meet the large-scale inspection needs of outdoor power plants. Based on the research and development of photovoltaic non-destructive testing technology, Shanghai LAILX has launched the LXG50 portable EL detector. With core capabilities such as high-definition imaging, full-time dark light autofocus, and AI intelligent defect recognition, it connects the entire chain from factory quality inspection to outdoor power plant on-site testing, becoming an important equipment for photovoltaic quality control. Photovoltaic power station tester

The LXG50 portable EL detector is equipped with a high specification industrial grade infrared CMOS imaging chip, which has ultra-high sensitivity and can capture micro level fine cracks. It can identify more than 20 types of internal faults in solar cells, such as hidden cracks, broken grids, virtual soldering, sintering defects, PID attenuation, hot spots, and fragments. Whether it is traditional P-type components, or new generation N-type high-efficiency components such as TOPCon, HJT, IBC, double glass, and half sheet large-sized components, it can output clear and reliable EL imaging images, and the imaging accuracy fully meets the requirements of the acceptance and testing specifications for photovoltaic power plants. The biggest highlight of the equipment is its self-developed full-time dark light autofocus system, which abandons the old mode of traditional portable EL devices that require manual distance measurement and supplementary light assistance for autofocus. Under complex on-site conditions such as low light at night, component slopes, and high and low temperature differences, the camera can achieve automatic autofocus without human intervention, greatly improving on-site detection efficiency. Compared with manual autofocus equipment, the operating efficiency is improved several times, effectively reducing the difficulty of on-site personnel operation and reducing problems such as image scrap and repeated detection caused by human focusing errors.

The entire equipment adopts a programmable integrated power module, supporting wireless WIFI and camera linkage control. The mobile phone and tablet APP can complete power on/off, parameter adjustment, and camera shooting control, freeing oneself from the constraints of complex wired control. The entire equipment consists of an infrared camera, a programmable power supply, and a lightweight carbon fiber bracket. After the bracket is stored, it is easy to transport, and a single person can complete the installation and testing of the entire equipment. It is suitable for multiple scenarios such as factory incoming material inspection, component arrival acceptance, power station completion inspection, annual operation and maintenance survey of existing power stations, and identification of faulty components. The equipment is equipped with comprehensive safety protection, and the power module integrates reverse connection, overcurrent, and overheat power-off protection. The working temperature range covers -15 ℃ to 55 ℃, and the testing can be stably carried out in cold northern and high temperature and high humidity southern environments in China, adapting to outdoor variable working conditions such as rain, snow, sand, and dust.

The intelligent software system is another core competitiveness of LXG50, which is matched with mobile operating software and supports component barcode scanning and input, defect AI automatic marking and classification, image correction, GPS point recording, and automatic generation of standardized inspection reports after inspection is completed. The AI defect recognition algorithm supports remote firmware iteration upgrades, continuously adapts to new types of battery cell defect samples, continuously optimizes recognition accuracy, reduces the huge workload of manually interpreting images one by one, helps inspectors quickly locate faulty components, and provides clear basis for maintenance and replacement. It is suitable for large-scale on-site inspections by third-party testing agencies, as well as meeting the daily troubleshooting needs of operation and maintenance enterprises, while also meeting the laboratory sampling requirements of component production enterprises.
In the context of high-quality development in the photovoltaic industry, the control of internal defects in components is increasingly valued by EPC and owners. EL testing has become a mandatory testing link for the delivery of new power plants and the operation and maintenance of existing power plants. The LAILX LXG50 portable EL detector breaks through the limitations of traditional equipment use, bringing laboratory level imaging capabilities to outdoor sites, balancing imaging quality, operational efficiency, and portability. It fills the gap in non-destructive testing for outdoor sites, helps the industry identify internal hazards of components in advance, avoid later power generation losses and safety risks, and continuously improves the quality system of the photovoltaic industry.

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