In the full lifecycle management system of photovoltaic modules, internal defects that are invisible to the naked eye are the core hidden risks that constrain the power generation revenue of the power station and shorten the service life of the modules. Minor damages such as hidden cracks, fragments, broken grids, electrode virtual welding, PID attenuation, black heart and black edge, interlayer delamination, etc. in battery cells cannot be identified through visual inspection and IV power testing. Long term operation will gradually expand the fault area, causing significant power attenuation of components and, in severe cases, posing a safety hazard of hot spot fire. Traditional EL electroluminescent detection equipment is divided into laboratory desktop models and early bulky outdoor models. Desktop computers can only be used in darkrooms in factories and cannot be used for on-site testing at power plants; Old style outdoor EL equipment has a heavy body, relies on external power supply, and produces blurry images under strong light. It takes a long time to detect, and it is extremely difficult to land in complex scenarios such as roofs, mountains, and water power plants. The industry has long lacked lightweight, all-weather, and independently powered portable EL detection solutions. Jiangsu Jingwei Technology is based on the core requirements of photovoltaic non-destructive testing, and has independently developed the JW-EL2 portable EL detector. Relying on the three core advantages of high-definition infrared imaging, lightweight integrated design, and independent long-term power supply, it has created a portable flaw detection equipment for photovoltaic modules, achieving all-weather outdoor on-site non-destructive defect detection, covering the entire process of module factory sampling, arrival acceptance, installation quality inspection, and operation and maintenance fault troubleshooting application scenarios. Photovoltaic power station tester
The Jiangsu Jingwei R&D team has broken through several core technical difficulties in outdoor EL detection one by one, and first completed the whole machine lightweighting innovation. The JW-EL2 machine integrates an imaging host, a programmable excitation power supply, and an energy storage battery in an integrated package. The weight of the machine is controlled within a portable operating range, and it is equipped with an ergonomic handheld handle and a protective storage box. A single person can independently complete the entire set of operations for transportation, installation, and testing. It is equipped with a retractable carbon fiber tripod, which can be freely adjusted in height and angle. It is suitable for ground laying components, roof tilting arrays, and multi angle imaging of floating photovoltaics on the water surface, with no blind spots for detection. The equipment casing is made of high-strength impact resistant industrial plastic, with IP64 dust and waterproof protection. It can operate stably in rain, snow, sand, high temperature and low temperature environments, completely eliminating the limitations of traditional equipment that can only detect at night and in a closed darkroom. It is equipped with an adaptive strong light suppression optical module, which can still capture high contrast infrared imaging in natural light environments during the day without the need to build a shading shed, greatly reducing on-site inspection preparation time. Single component imaging can be completed in as fast as 3 seconds, and batch acceptance efficiency is improved several times.
The imaging and defect recognition capabilities have reached the forefront of the industry. The JW-EL2 is equipped with a high-sensitivity and high-definition infrared imaging sensor, with pixel specifications adapted to capture subtle defects. It can clearly present internal damages such as 0.1 millimeter level micro cracks, micro broken grids, and point like virtual welding that are completely unrecognizable to the naked eye. The imaging image has clear layers, and the defect boundaries are clear and noise free. The device is equipped with multiple adjustable programmable constant current excitation power supplies, suitable for various mainstream silicon-based components such as monocrystalline, polycrystalline, TOPCon, HJT, etc., and can complete full category component testing without replacing accessories; Equipped with a wireless tablet image transmission control system, inspectors do not need to get close to the components. They can preview imaging images, store original images, and mark defect locations in real-time on the tablet, greatly reducing the risk of falling safety during high-altitude rooftop operations. The wireless transmission cable is wrapped around it, making mobile detection more flexible. The device is equipped with a large capacity and high-density lithium battery, which can continuously perform uninterrupted testing of over 100 components throughout the day when fully charged. Remote and non commercial power stations do not require a generator or external power cord, and batch testing operations can be carried out by opening the box and installing it, solving the problem of outdoor power supply.
The intelligent supporting functions greatly reduce the threshold for on-site use. JW-EL2 is equipped with a local large capacity storage module, and each EL imaging image is automatically bound with component number, detection time, and station location information. It supports on-site annotation of defect types and damage areas. All image data can be exported to the computer through USB and wireless methods, and standardized defect detection reports can be automatically generated. The report format meets the compliance requirements of domestic photovoltaic engineering acceptance and third-party testing institutions, and can be directly used as an authoritative basis for component quality judgment, claims, and rectification. The whole machine operation interface is fully visualized in Chinese, with clear functional zoning and no complex professional settings. Zero basic operation and maintenance personnel can independently complete the entire process of detection, imaging, and report export through simple training, greatly reducing the cost of enterprise manpower training. The device supports multi angle review of historical imaging, which facilitates annual inspection and comparison of component defect expansion, accurately evaluates the remaining service life of components, and provides intuitive image support for adjusting power plant operation and maintenance strategies.
For a long time, the high-end portable EL non-destructive testing equipment market has been monopolized by overseas brands, with high equipment procurement prices, long spare parts and after-sales maintenance cycles, high costs, and enormous procurement pressure for small and medium-sized photovoltaic operation and maintenance and engineering enterprises. Jiangsu Jingwei JW-EL2 relies on the advantages of a complete local industrial chain to achieve fully independent research and development and production of hardware and algorithms. With imaging accuracy, portability, and battery life comparable to imported equipment, it significantly reduces procurement costs and is equipped with nearby after-sales outlets nationwide, one-year machine warranty, and lifetime free algorithm upgrade services. It completely breaks down barriers in the overseas brand market and enables small and medium-sized new energy enterprises to equip themselves with professional level on-site non-destructive testing equipment. Since its launch, the product has been widely used by domestic distributed photovoltaic operation and maintenance companies, quality inspection departments of component production enterprises, new energy EPC engineering units, and third-party photovoltaic testing laboratories. It has received a lot of first-line praise in projects such as batch acceptance of household rooftop photovoltaics, troubleshooting of mountain photovoltaics, and assessment of the lifespan of old power station components, helping customers quickly locate batch hidden defects and avoid large-scale power generation losses and safety accidents in advance.
The high-quality development of the photovoltaic industry cannot be separated from full chain quality control, and on-site non-destructive testing of components is an indispensable part of the refined operation and maintenance of power plants. Jiangsu Jingwei JW-EL2 portable EL detector, with its core advantages of lightweight, all-weather, and high imaging accuracy, reconstructs the on-site inspection operation mode of photovoltaic modules and fills the market gap of domestic small independent power supply portable EL equipment. In the future, Jiangsu Jingwei will continue to optimize AI automatic defect recognition algorithms, achieve automatic labeling of hidden cracks, virtual welding, fragments and other faults in the imaging system, further simplify manual interpretation work, continuously iterate hardware protection and endurance performance, and independently develop non-destructive testing equipment to safeguard the healthy operation of various photovoltaic station components across the country, and help the clean energy industry improve quality and efficiency for long-term development.
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