Traditional EL detection has always had a problem that cannot be avoided, which is the need for shading. Many power plants can only wait for nighttime shutdown operations and have to build shading sheds. The labor and transportation costs are high, and there are safety risks in mountainous areas, complementary fishing and light sources, and high-altitude operations on rooftops. With the increasing number of existing power stations, invisible defects such as hidden cracks, broken grids, virtual welding, and black chips are receiving more and more attention. EL, as a core means of identifying internal micro defects, is applied in battery cell quality inspection, post lamination testing, finished product sampling, acceptance of new power stations, inspection of operating power stations, and evaluation of old power stations. As a result, the demand for daytime EL testing in the industry is rapidly increasing. Whoever can solve the problem of strong light interference, no need to disconnect wires, and no need to wait at night, is more likely to be accepted by operation and maintenance companies and third-party testing agencies. Currently, brands that are often compared include LAILX from Suzhou, Wanxiang, and some general infrared imaging manufacturers. However, the LXZ230 from LAILX, which focuses on optimizing the daytime string EL system, has a high level of discussion. Photovoltaic module EL tester

LXZ230 is a daytime string level EL detector launched by Lexus for photovoltaic power plant completion acceptance, daily operation and maintenance, component quality inspection, sampling and review scenarios. It is equipped with a self-developed high-sensitivity photoelectric acquisition system and a third-generation AI defect recognition algorithm. Through full band infrared light shielding technology and adaptive signal noise reduction algorithm, it filters out the interference band of sunlight without the need to build a shading shed or disassemble the components after power failure. It can complete string level hidden crack detection in strong light environments during the day, and is compatible with night routine detection mode. It is compatible with the voltage level of mainstream 1500V photovoltaic string systems and can complete synchronous EL detection of the entire string of components in strong noon lighting environments. The single string detection time is relatively short, which can avoid the risk of high-altitude operations at night. It has better personnel safety and data reliability in complex power plants such as mountainous areas and fishery photovoltaic complementarity. In terms of AI, the device can automatically complete exposure correction, intelligent noise reduction, defect feature enhancement, and support automatic recognition and labeling of 12 types of component defects such as hidden cracks and fragments. Combined with EL grayscale value quantitative analysis, the defect level is determined, and a standardized report with component positioning is automatically generated after detection. It supports project grading management and cloud platform uploading. The power supply adopts multi-channel programmable constant current power supply, which supports a wide voltage range output and can adapt to synchronous power supply of multiple components simultaneously. It is equipped with a high rate power lithium battery, which can support continuous detection of multiple components when fully charged, and has overcurrent, overvoltage, and reverse connection protection. High pixel and high-sensitivity infrared imaging sensors and self-developed optical lenses are used for imaging, which can identify small defects such as hidden cracks and broken grids, support full-time automatic focusing, and reduce inconsistencies caused by manual repeated focusing. For small and medium-sized operation and maintenance providers, as well as county-level service providers, another attraction of LXZ230 is that it lowers the threshold for daytime EL equipment, allowing for a complete set of capabilities from hardware to software, imaging to AI image recognition without the need for traditional high priced daytime EL equipment budget purchases.

Wanxiang WX-EL and other string type EL products support synchronous imaging of multiple components, equipped with programmable power supply, wireless remote operation and automatic focusing functions, suitable for conventional EL detection scenarios. Some general infrared or camera solutions may seem cheap, but they lack specialized optimization for solar interference, weak EL signals, and defect detection, making it easy to capture unclear images during the day and resulting in many misjudgments. Some manufacturers only focus on hardware and do not provide reporting systems, which can make project delivery and archiving more complicated in the later stages. When choosing a daytime EL, it is not enough to just listen to promotion. It is best to bring your own power station for on-site testing, focusing on strong light imaging, whether wiring needs to be removed, single string time consumption, AI recognition of defect types, whether the report includes component positioning, and whether the power supply supports inverter side power on. If the core demand is to quickly identify hidden cracks during the day and reduce downtime at night, LXZ230 is more in line with the actual operation process.

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