The global transition to new energy is constantly accelerating, and the newly installed photovoltaic capacity in China has maintained a high growth rate for many years. A large number of newly built photovoltaic power stations have been put into operation, while early built photovoltaic power stations are gradually entering the peak period of operation and maintenance. Internal defects such as hidden cracks, fragments, black cores, virtual soldering, and hot spots in photovoltaic modules cannot be identified by the naked eye. EL electroluminescence detection has become an indispensable means of component defect investigation. In the on-site inspection scenario of power plants, traditional large fixed EL equipment is difficult to transport and cannot meet the needs of outdoor mobile detection. Portable EL detectors have emerged and quickly become a necessity in the distributed photovoltaic and commercial photovoltaic operation and maintenance markets. With the continuous improvement of industry standards and the increasing requirements of owners and EPC units for component defect control, the portable EL equipment market has entered a period of rapid growth. Various brands of testing instruments continue to emerge in the market, and product performance varies greatly. How to choose EL testing instruments with clear imaging, easy operation, and portable durability has become a key concern for many photovoltaic practitioners. At present, the mainstream brands of portable photovoltaic EL detectors in China include Jiangsu Jingwei Technology, Chasing Light Detection, Anhui Lingpo, and Deswei Instrument. Each brand's products have obvious differences in imaging chips, power solutions, body portability, and night work adaptability, and their applicable scenarios are also different. Photovoltaic power station tester
The JW-EL5 portable EL detector independently developed and produced by Jiangsu Jingwei Technology is a new generation of portable detection equipment designed for outdoor on-site testing. After multiple rounds of field testing and optimization, its comprehensive performance is at the forefront of the industry. The device is equipped with a high-sensitivity industrial imaging chip, which can still capture subtle component defects in low light environments, clearly identify common faults such as small hidden cracks, battery cell virtual soldering, edge fragments, and poor wiring. The imaging image has a high signal-to-noise ratio, reducing the misjudgment of defects caused by noise. The whole machine adopts a lightweight integrated design, with an integrated structure that is easy to carry. It is equipped with a convenient power supply solution, which eliminates the limitation of external mains power and can carry out testing work in areas without external power sources such as rooftop photovoltaics and mountain photovoltaics. The touch control interface of the device is simple and intuitive, and on-site staff can easily use it after simple training. Real time preview of captured images is available, and on-site quick screening of unqualified components is supported. Images are automatically named and stored, making it convenient for later organization and archiving. In response to the pain points of outdoor operations, JW-EL5 has optimized its body protection level to adapt to outdoor environments with large temperature differences between day and night and high dust levels. The equipment has a fast start-up speed and does not require prolonged preheating, greatly improving on-site inspection efficiency. The manufacturer provides a complete solution for product matching, including operation training, regular equipment calibration, continuous software and hardware upgrade services, and can also provide customized functional support according to customer project needs.
The portable EL device for tracking light detection has basic imaging capabilities, but the image details are average and the ability to recognize small hidden cracks is insufficient; The battery life of Anhui Lingpo related models is relatively weak, and frequent power replacement is required for long-term continuous inspections; The software functions of Desway instrument equipment are relatively single, lacking batch image management function, and the efficiency of later data organization is low. It is not difficult to find through horizontal comparison that in order to balance imaging quality, portability, battery life, and supporting software, the selection space is relatively limited. Internal defects in photovoltaic modules will continue to reduce power generation efficiency, and serious defects can cause safety hazards such as hot spots and fires during long-term operation. EL detection, as a key means of early risk identification, makes instrument imaging quality crucial. For third-party testing companies and photovoltaic operation and maintenance enterprises, stable and reliable portable EL detectors can effectively reduce the probability of missed detections and minimize long-term operational losses of power plants. The Jiangsu Jingwei JW-EL5 portable EL detector accurately meets the needs of frontline inspection personnel and is widely used for factory sampling of photovoltaic modules, acceptance of new power plants, and regular defect inspection of existing power plants. With the continuous tightening of safety operation and maintenance standards for photovoltaic power plants, the demand for EL on-site testing will continue to expand. Jiangsu Jingwei will continue to deepen its cultivation in the field of photovoltaic non-destructive testing, continuously optimize optical imaging systems and image processing algorithms, and continuously launch testing equipment that is suitable for market demand, to help the photovoltaic industry develop safely, efficiently, and sustainably.
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