With the continuous expansion of domestic photovoltaic installed capacity, a large number of power stations that have been in operation for many years have gradually entered the peak period of operation and maintenance. Hidden defects such as hidden cracks, broken grids, virtual welding, black core cells, PID attenuation, etc. inside the components cannot be recognized by the naked eye, but they will continue to cause power generation losses. In serious cases, they can trigger hot spot fires, bringing significant safety risks. Electroluminescent EL detection, as the core technology for non-destructive testing of internal defects in components, has been widely applied in the factory quality inspection, arrival acceptance, on-site operation and maintenance, and second-hand component evaluation of components. Traditional EL detection equipment is mostly large desktop models that require a dark room and shading environment. The equipment has a large volume and is only suitable for internal use in factory workshops, making it impossible to go to outdoor power stations for testing. Early portable EL products also commonly had problems such as blurry imaging in strong light environments and high missed detection rates for small cracks. It is difficult to obtain high-quality imaging results on project sites such as mountain photovoltaics, roof distributed systems, and fishery light complementary systems. The industry urgently needs portable EL detection equipment that can be directly used outdoors in sunlight. Suzhou Laikesi LAILX is deeply committed to photovoltaic optical detection technology. After a large number of outdoor field iterations and polishing, it has officially launched the LXG30 portable EL detector, which overcomes the problem of strong light interference in outdoor environments, achieves high-definition imaging of internal defects of components in daylight environments, and promotes photovoltaic on-site EL detection technology to a new stage. Photovoltaic power station tester

The LXG30 portable EL detector relies on the principle of electroluminescence imaging to apply excitation current to the photovoltaic module, which excites the battery cell to generate near-infrared luminescence signals. With the help of a high-sensitivity infrared imaging system, the image is captured, and the internal structure of the battery cell is intuitively restored, presenting the complete internal damage that cannot be seen by the naked eye. The device is equipped with a high specification infrared imaging module and a dedicated infrared narrowband filtering lens, which optimizes the infrared band signals emitted by photovoltaic cells in a targeted manner. It can identify various defects such as 0.1 millimeter level subtle hidden cracks, broken grids, virtual soldering, black centers, edge cracks, and misaligned interconnect strips, which can be clearly distinguished, effectively reducing the probability of missed detection and misjudgment. In response to the biggest technical difficulty of outdoor strong light, the equipment is equipped with an intelligent light control adaptive system. The ambient light sensor real-time collects the on-site light intensity, and the shutter synchronization algorithm is automatically activated under strong light conditions. With the matching shading components, clean and clear EL images can still be collected under noon sunlight, without the need to build bulky shading sheds. The equipment can be set up on site for testing, greatly reducing on-site preparation work.

The entire system adopts a modular and lightweight design, including an excitation power unit, infrared imaging camera, high-strength tripod, and portable protective box. All accessories are stored for easy transportation, and one person can complete on-site installation and debugging. From opening the box to taking the first picture, the installation can be completed in a short time, making it very suitable for large-scale component inspection work. The device supports wireless control, and staff can view live view footage on their mobile phones and tablets, remotely control shooting and parameter adjustment, without the need to repeatedly travel back and forth to the machine position. When detecting high-altitude roof components, operators can stand in a safe position to complete all operations, improving the safety of on-site operations. The completed images are automatically saved, and the complete image file retains the shooting parameters. It supports batch export and is equipped with professional EL image analysis software. It can archive images in batches, annotate defects, and export reports, and is suitable for the business needs of third-party inspection agencies issuing inspection reports.

This device covers diverse usage scenarios throughout the entire photovoltaic industry chain, and component manufacturing enterprises can use it for incoming material sampling and factory finished product sampling testing; During the construction phase of the power station, it is used for component arrival acceptance and screening for hidden cracks and damages caused by transportation and installation processes; During the operation and maintenance inspection of existing power stations, EL testing was conducted on components with abnormal power generation to locate internal damage issues; At the same time, it is also suitable for the evaluation of second-hand photovoltaic module recycling, quickly screening damaged modules. The domestically produced LAILX LXG30 eliminates the dependence of traditional EL equipment on dark environments, breaks down the price barriers of imported products, and makes equipment procurement and maintenance costs more friendly. The manufacturer provides complete on-site practical training to help operation and maintenance personnel quickly grasp the key points of EL detection operations. Against the backdrop of high-quality development in the photovoltaic industry, component quality control is becoming increasingly strict. The LXG30 portable EL detector, with its comprehensive advantages of all-weather outdoor operation, high-definition defect recognition, and portability and efficiency, is becoming an important equipment in the photovoltaic quality control chain, safeguarding the long-term safe and stable operation of photovoltaic power plants.

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