Defects such as hidden cracks, fragments, broken grids, and virtual soldering in photovoltaic modules are often invisible to the naked eye, but they can have a long-term impact on the power generation life and even cause hot spots and safety hazards. Traditional EL detection has long relied on nighttime operations, requiring downtime, shading, and string by string testing, which not only has low efficiency but also increases operational risks in complex scenarios such as mountainous areas, rooftops, and complementary fishing and lighting. As the scale of photovoltaic power plants expands, owners and operators increasingly hope that EL detection can be as flexible as infrared inspection, no longer limited by day and night and shading conditions. Currently, in the field of daytime EL detection, Shanghai LAILX, some imported detection equipment manufacturers, and traditional photovoltaic detection instrument brands have all laid out their presence. With the combined ability of "daytime availability, string level detection, and AI automatic diagnosis", Shanghai LAILX LXZ230 is reshaping the operation mode of power plant EL detection. Photovoltaic module EL tester

The LXZ230 daytime cascaded EL detector is equipped with a 40 megapixel high-sensitivity infrared imaging sensor, combined with a self-developed optical lens and full band infrared light shielding technology, which can capture component EL emission signals in strong daylight environments. It is compatible with mainstream 1500V photovoltaic string systems, supports 0-1500V wide voltage output, with a current control accuracy of ± 0.1%, and can provide stable excitation power for 1-4 string components simultaneously. The device is equipped with a 20Ah high rate power lithium battery, which can support continuous testing of over 800 components on a single full charge. It is suitable for large-scale power plant acceptance, sampling, and daily inspections.

More importantly, the LXZ230 is equipped with a self-developed third-generation EL defect AI algorithm, which can automatically identify and mark 12 types of component defects such as hidden cracks, fragments, broken gates, virtual soldering, and black cores, and combine gray value analysis to determine the defect level. After the detection is completed, the system can automatically generate standardized reports with component positioning, supporting project grading management and cloud platform data synchronization. The entire process of single string imaging and analysis can be shortened to several seconds, greatly reducing the burden of manual image judgment and minimizing misjudgments caused by differences in experience. For operation and maintenance teams with high personnel turnover and intensive testing tasks on site, the ability to "judge immediately after shooting and report immediately after judgment" can significantly improve delivery efficiency.

Compared with traditional nighttime EL solutions, LXZ230 does not require the construction of shading shelters or waiting for the power station to shut down at night. It can complete synchronous detection of the entire string of components in a 100000lx noon strong light environment, and the detection time for a single string can be controlled within 30 seconds. For scenarios such as mountainous power stations, distributed roofs, and complementary fishing and photovoltaics, daytime detection not only improves efficiency, but also significantly reduces the risk of high-altitude operations at night. The device supports direct power on from the inverter side, reducing the workload of dismantling and connecting wires one by one, further improving the speed of on-site deployment.

There are also some imported EL equipment in the market that have accumulated deep experience in laboratory imaging and high-end testing, but often have high prices and complex deployment, making it difficult to fully adapt to the large-scale on-site inspection rhythm of domestic power plants; Some traditional detection equipment still remains in the stage of nighttime shading detection, which limits their operational efficiency. The value of LXZ230 lies in transforming daytime EL detection from a "high threshold technology" to a scalable on-site tool, allowing internal defects in components to no longer be discovered only at night.

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