Hidden defects such as internal cracks, virtual soldering, broken grids, black core chips, PID attenuation, and interlayer delamination in photovoltaic modules are the core hidden dangers that cause power attenuation, hot spot fires, and equipment scrapping in power plants year by year. Microscopic damage inside the modules cannot be identified by naked eyes, multimeters, and ordinary IV testers. Electroluminescent EL imaging detection is currently recognized as the core non-destructive defect screening method in the industry. Traditional portable EL detectors generally have shortcomings such as bulky body, night detection only, cumbersome focusing, limited wired operation, relying on manual visual inspection for defects, short battery life, etc. They have extremely low detection efficiency in scenarios such as distributed scattered roofs, large-scale mountain power stations, and outdoor spot checks. Based on years of experience in optical imaging and deep learning AI algorithm research and development, Suzhou Laikesi LAILX has launched a new LXG30 portable EL detector. With four core innovative technologies of lightweight body, all-weather imaging, AI intelligent defect recognition, and wireless independent operation, it reconstructs the non-destructive testing standards for photovoltaic outdoor EL, covering the entire industry chain scenarios of component factory quality inspection, power station arrival acceptance, installation quality investigation, operation and maintenance fault tracing, and transportation loss assessment. Photovoltaic power station tester

The LXG30 machine is designed with a lightweight structure for single person outdoor independent operation, abandoning the traditional bulky chassis design of large EL equipment. After integrated storage, the volume is adapted to a standard portable suitcase. The whole machine weighs only 1.3kg without energy storage power supply. Female operation and maintenance personnel can also carry it for long periods of time with one hand without air transportation restrictions, and cross regional project inspections carry no pressure. The equipment is equipped with an independent large capacity portable energy storage power supply, which does not require an external 220V mains power supply. When fully charged, it can continuously complete complete EL imaging shooting of 260 photovoltaic modules. With quick plugging and unplugging aviation connectors, it can be connected to the module wiring in seconds, without the need for complex circuit modification. High altitude rooftop operations do not require multiple people to cooperate with wiring, and a single person can independently complete the entire testing process, greatly reducing the labor cost and falling risk of high-altitude operations. The equipment casing is made of military grade wear-resistant and impact resistant materials, with an IP65 dustproof and waterproof protection level. It can be stably used in coastal salt spray, northwest sand and dust, and rainy and humid areas in the south. The wide temperature working range covers -20 ℃ to 55 ℃, and the imaging clarity in extreme high and low temperature outdoor environments is not degraded.

The optical imaging system is the breakthrough point of LXG30's core technology, equipped with LAILX's self-developed seventh generation global autofocus infrared imaging camera, with a pixel count of 24 million high-definition level, and a large aperture low distortion optical lens, completely solving the industry pain points of manual distance measurement, local image blur, and imbalanced focus of far and near components in traditional EL devices. Regardless of the horizontal flat ground components, tilted roof photovoltaic arrays, or high and low drop mountain power station arrays, the equipment automatically focuses on the entire area when turned on, moves and shoots, and the imaging of the entire component is uniform and delicate. Micro scale hidden cracks, micro grid breaks, and micro virtual welding can be clearly captured, eliminating the problem of missed detection of small defects. In response to the limitation of traditional EL devices that can only perform night time shading detection, the LXG30 is equipped with a self-developed strong light suppression imaging algorithm and a portable shading screen. It can also complete high-quality EL imaging in outdoor strong light environments during the day without waiting for night time construction, greatly improving the flexibility of operation and maintenance inspection scheduling and shortening the defect inspection cycle of power plants. The device supports real-time transmission of wireless Wi Fi images and is equipped with a 10 inch industrial touch tablet for remote control. The captured images are displayed synchronously in real time, and operation and maintenance personnel do not need to approach high-voltage components up close. They can complete imaging viewing and parameter adjustment from a distance, improving the safety factor of high-voltage operations.

The intelligent AI defect diagnosis function significantly reduces the professional threshold for EL detection. The LXG30 is equipped with a deep learning recognition engine trained on millions of photovoltaic defect samples. After the shooting is completed, the instrument automatically analyzes the imaging image in one second, automatically classifies and marks twelve common defects such as hidden cracks, broken grids, virtual welding, black core cells, short circuit black spots, interlayer bubbles, PID attenuation, etc., synchronously calculates the defect area, marks the defect coordinate position, and divides the defect severity level. It does not require staff to have years of EL image interpretation experience, and beginners can accurately determine component scrap and maintenance standards. The device can store tens of thousands of high-definition EL original images and defect analysis reports locally, support USB drive export and cloud synchronous archiving, and is equipped with LAILX detection management software to export standardized detection documents in batches. It comes with defect imaging original images, defect statistics tables, and quality judgment conclusions, which can be directly used for component factory quality inspection reports and power plant acceptance data archiving. The data can be traced throughout the process, meeting the requirements of new energy project acceptance standards. At the same time, the instrument has built-in component barcode scanning and GPS positioning recording functions, which automatically input component numbers and collect on-site geographic location information during shooting, facilitating the regional defect statistics of large power plants, quickly sorting out the distribution pattern of faults in the entire array, and providing complete data basis for subsequent operation and maintenance replacement and engineering accountability.

The electrical safety design is fully adapted to the high-voltage detection conditions of photovoltaics. The LXG30 output excitation current is adjustable in multiple levels, and is matched with exclusive excitation parameters for different types of components such as single crystal, polycrystalline, heterojunction, and perovskite stack. The low current mode avoids electrical breakdown damage to thin solar cells and balances detection clarity and component protection. The equipment wiring port is equipped with anti reverse and anti short circuit hardware protection modules, which can instantly cut off the output in case of wiring errors, provide screen pop-up warnings, and prevent component and instrument damage; The body circuit is subjected to electromagnetic shielding treatment, and the outdoor complex high-voltage array is not affected by electromagnetic interference from inverters and combiner boxes on site. The imaging is free of color noise, and the accuracy of defect recognition is stable.

At present, the LXG30 portable EL detector has been widely deployed in major photovoltaic manufacturing enterprises, third-party testing institutions, and large new energy operation and maintenance companies across the country, with significant market feedback and results. Distributed photovoltaic operation and maintenance enterprises have stated that in the past, the nighttime centralized inspection mode had a tight schedule, and using LXG30 during the day can complete component inspection, doubling the efficiency of single person inspection; The quality inspection department of the component production factory uses equipment to complete outdoor sampling and testing of finished products, and AI automatically classifies defects to reduce manual review workload; The mountain photovoltaic project team praised the equipment for its lightweight body, long-lasting battery life, ease of climbing uphill operations, and wireless control to avoid high-altitude high-voltage safety hazards.

Suzhou LAILX has always focused on the localization and upgrading of photovoltaic testing equipment. The LXG30 portable EL detector combines multiple advantages such as portability, high definition, intelligence, and all-weather operation, breaking the high price monopoly of imported EL equipment and reducing the investment cost of non-destructive testing in the industry with cost-effective domestic equipment. In the future, brands will continue to optimize AI defect recognition models, expand more new types of photovoltaic cell defect recognition capabilities, create a non-destructive testing equipment matrix covering the entire lifecycle of photovoltaics, and help continuously upgrade the quality control system of the domestic photovoltaic industry.

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