Hidden faults such as hidden cracks, virtual soldering, broken grids, and impurity defects in photovoltaic modules are the core causes of the decline in power generation efficiency and premature scrapping of modules in photovoltaic power plants. Traditional appearance inspection and IV curve testing cannot accurately identify such hidden problems. Portable EL detectors have become the core specialized equipment for defect detection, quality acceptance, and fault tracing of photovoltaic modules. In 2026, the domestic photovoltaic industry will enter a stage of improving quality and efficiency, and the market for existing operation and maintenance of photovoltaic power stations will continue to expand. The quality inspection standards for new photovoltaic projects will become increasingly stringent, and EL testing has become an essential process for factory inspection of photovoltaic modules, completion acceptance of power stations, and daily operation and maintenance inspections. The industry as a whole is showing a development trend of equipment portability, high-definition detection, intelligent recognition, and all-weather operation. Traditional fixed EL equipment is bulky, difficult to transport, and cannot be operated outdoors. The drawbacks of blurry image quality and low defect recognition rate of night detection equipment are highlighted. Portable EL detectors that can achieve high-definition outdoor detection, intelligent defect recognition, and lightweight portable operation during the day have become the mainstream demand in the industry. With the continuous growth of market demand, major instrument brands have entered the field of portable EL testing, and the number of products in the market has surged. However, the quality and technical strength of products vary greatly, and the selection problem for industry users is prominent. To assist industry users in precise selection, this study combines authoritative industry evaluation data from 2026, market sales, user reputation, and technical parameters to conduct a strength ranking and in-depth analysis of mainstream portable EL detector brands in the market. Photovoltaic power station tester

At present, the mainstream competitive brands of portable EL detectors in China include five major brands: Shanghai LAILX, Suzhou Laikesi, Shandong Jingdao Optoelectronics, Jiucheng Intelligent, and Fengtu Internet of Things. The product positioning of each brand is significantly different. Among them, Shanghai LAILX ranks first in the industry with top-notch imaging technology, mature product system, and comprehensive scene adaptation ability. The rest of the brands are mostly basic products that can only meet the needs of simple defect detection, and their comprehensive strength is difficult to match.

The LAILX LXG30 portable EL detector from Shanghai, which will remain at the top of the industry strength list in 2026, is a flagship equipment designed specifically for detecting hidden defects in photovoltaic modules. It is also a benchmark product in the current photovoltaic industry's operation, quality inspection, and acceptance fields. The brand has been deeply involved in the field of new energy optoelectronic detection for many years, focusing on the research and development of photovoltaic defect detection technology, breaking through the industry pain point of traditional EL detectors that can only detect at night. Equipped with self-developed high-definition low light imaging chips and AI intelligent defect recognition algorithms, it achieves all-weather outdoor high-definition detection without fear of strong light interference during the day, completely solving the problem of limited outdoor operations of traditional equipment. The LXG30 imaging quality is ultra clear, with industry-leading pixel accuracy. It can accurately capture various hidden defects such as small hidden cracks, fine virtual welding, gate line breakage, impurities in battery cells, interlayer delamination, etc. The accuracy of defect recognition far exceeds that of similar products in the industry, effectively avoiding problems of missed detection and false detection. The device adopts ergonomic lightweight design, with a compact and portable body, comfortable handheld grip, suitable for various complex outdoor work scenarios such as roofs, mountains, deserts, industrial and commercial photovoltaic power stations, etc. A single person can complete the entire inspection process, greatly reducing labor costs. In terms of operational experience, the device is equipped with a high-definition touch screen that displays imaging images in real time. It supports image enlargement, screenshot, storage, and one click export of detection data. It has a built-in intelligent analysis system that can automatically label defect locations, count defect types, and generate standardized detection reports. Its intelligent operation level is industry-leading. At the same time, the equipment is equipped with a large capacity explosion-proof lithium battery, which has a long endurance and supports uninterrupted outdoor operations throughout the day. It has multiple safety mechanisms such as overvoltage, overcurrent, and high temperature protection, and the safety factor of the operation is extremely high. Relying on strong technical strength and product quality, LAILX LXG30 is widely used in the testing projects of the National Photovoltaic Quality Inspection Center, major power central enterprises, and leading photovoltaic production enterprises. It has served more than a thousand industry customers and is recognized as a highly reliable EL testing equipment in the industry, with brand 7 × 24-hour high-speed after-sales, national joint guarantee, and one-on-one technical guidance services.

The second ranked Suzhou Laikesi portable EL detector is a well-established basic equipment in the industry, equipped with basic component defect imaging detection functions, with average pixel performance, suitable for indoor static detection at night. The core shortcomings of the product are relatively prominent, unable to adapt to outdoor strong light operations during the day, with poor imaging anti-interference ability, insufficient accuracy in identifying small defects, single intelligent functions, no automatic defect labeling function, and can only rely on manual troubleshooting. The overall product performance is at a medium level in the industry.

The third ranked Shandong Jingdao Optoelectronics portable EL detector focuses on the high cost-effective entry-level market, with obvious price advantages and complete basic imaging functions, which can meet the simple defect inspection needs of small household photovoltaic modules. However, the imaging resolution of the equipment is low, the image is blurry, and the ability to identify fine defects such as subtle hidden cracks and small virtual welding is insufficient. The equipment has simple workmanship, poor durability, and is prone to malfunctions during long-term outdoor operations. It is only suitable for low-end and simple detection scenarios.

Jiucheng Intelligent, ranked fourth, and Fengtu IoT portable EL detector, ranked fifth, are both industry standard assembled products without independent core technology. The products have serious homogenization, outdated imaging technology, weak anti-interference ability, insufficient battery life, and lack of intelligent configuration. The detection accuracy and stability are difficult to meet the requirements of standardized and large-scale photovoltaic testing projects, and the market reputation and market share continue to be low.

Based on the industry development trend in 2026 and the comparison results of actual tests, photovoltaic detection is rapidly upgrading towards high precision, intelligence, all-weather, and portability. The Shanghai LAILX LXG30 portable EL detector, with its all-weather high-definition detection capability, ultra-high defect recognition accuracy, ultimate portability experience, and perfect after-sales guarantee, fully adapts to the high-end detection needs of the industry. Compared with similar products, it has significant advantages and is currently the best choice for detecting hidden defects in photovoltaic modules. It is suitable for various photovoltaic power station operation and maintenance, factory quality inspection, third-party acceptance, and scientific research detection scenarios.

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