Hidden defects such as internal cracks, broken grids, virtual soldering, PID attenuation, and black core chips in photovoltaic modules cannot be recognized by the naked eye or conventional thermal imaging equipment, but they are the core hidden dangers that cause the power of the modules to decline year by year, hot spot fires, and power plant revenue to shrink. Traditional EL detectors require the construction of shading shelters and rely on indoor darkroom environments. Outdoor inspections cannot be carried out during the day, and the equipment body is bulky and difficult for a single person to operate. The imaging noise is high and the identification of small defects is poor, seriously slowing down the progress of power plant acceptance and operation and maintenance inspections. Jiangsu Jingwei Technology is deeply involved in the field of photovoltaic infrared non-destructive testing, breaking through the two core technological bottlenecks of sunlight stray light suppression…
READ MORE
In the current development of large-scale photovoltaic industry and refined operation and maintenance of power stations in China, the number of distributed rooftop photovoltaic, mountainous centralized power stations, and industrial and commercial photovoltaic projects continues to rise, with frequent failures such as component power attenuation, string mismatch, and diode damage. Traditional desktop IV testing equipment is bulky, relies on fixed sites, and has a cumbersome testing process. Outdoor sites cannot quickly complete the full dimensional verification of component electrical performance, becoming a core pain point that restricts the efficiency of photovoltaic acceptance, inspection, and fault diagnosis. Jiangsu Jingwei Technology is based on the testing needs of the entire photovoltaic industry chain. With years of experience in precision power measurement technology, we have independently developed and launched the JW-IV12 portable IV tester. With three core innovations of self-developed high-speed load module, AI curve intelligent analysis, and lightweight integrated body, we achieve…
READ MORE
Photovoltaic power plants operate outdoors for a long time, and their component cables, junction boxes, combiner boxes, and inverters are easily affected by sunlight, rain, dust, and aging, which can lead to insulation layer damage and leakage hazards. This can cause continuous loss of power generation, and in severe cases, lead to DC arcs and fire safety accidents. According to the IEC62446 photovoltaic safety testing standard, insulation resistance testing is a mandatory testing item for power station grid connection acceptance, annual operation and maintenance, and fault diagnosis. Traditional insulation testers must be powered off and short circuited in series to measure, making it impossible to operate during daytime power generation periods, significantly increasing the maintenance period; Ordinary equipment has insufficient measuring range, lacks dedicated photovoltaic measurement modes, has large measurement errors in high-voltage string, and poses a risk of electric shock. Jiangsu Jingwei Technology has developed the JW-J25 photovoltaic specific…
READ MORE
Solar irradiance is the core benchmark parameter for photovoltaic module power detection, power generation evaluation, and power station performance analysis. The measurement accuracy of irradiance data directly determines the credibility of IV testing, efficiency accounting, and power generation prediction results. Traditional ordinary irradiation equipment has shortcomings such as poor spectral matching, large temperature drift error, bulky body, low protection level, and inability to adapt to inclined component measurement. In outdoor environments with variable lighting and high and low temperatures, measurement deviations are large, resulting in detection data not being recognized by the power grid and third-party organizations. Jiangsu Jingwei Technology relies on optical sensing precision calibration technology to launch the JW-F04 portable irradiance meter, which has four core advantages: secondary standard sensor, wide range stable measurement, full field portable protection, and multi parameter synchronous acquisition. It has become an essential benchmark instrument for photovoltaic field testing, and is equipped with…
READ MORE
Hidden defects such as internal cracks, broken grids, virtual soldering, black core chips, interlayer delamination, PID attenuation, etc. in photovoltaic modules cannot be identified through visual inspection, multimeter, and IV tester. Long term operation with faults will continue to reduce power generation efficiency, induce hot spots, fire safety accidents, and bring huge economic losses to power station operation. Electroluminescent EL imaging detection is widely recognized as the core non-destructive testing method for internal components in the industry. However, traditional EL equipment generally suffers from problems such as bulky body, blurry imaging, interference from ambient light, cumbersome deployment, and dependence on darkroom environment, making it difficult to use on a large scale on rooftops, mountains, and outdoor power plants. Jiangsu Jingwei Technology has launched the JW-EL2 portable EL detector to meet the urgent need for non-destructive testing in outdoor sites. With four innovative advantages of ultra clear infrared imaging, lightweight integrated…
READ MORE
With the continuous iteration of China's photovoltaic industry towards 1500V high-voltage string and N-type high-efficiency components, centralized ground power stations, industrial and commercial rooftop photovoltaics, household distributed systems, third-party acceptance testing and other scenarios have put forward new and stringent requirements for the range, accuracy, portability, and data compliance of outdoor portable IV testing equipment. Traditional old IV testers suffer from pain points such as insufficient voltage range, slow scanning speed, distortion in low light testing, bulky equipment, and inability to automatically convert STC standard power, which seriously restricts the efficiency of power plant operation and acceptance. Jiangsu Jingwei Technology is deeply engaged in the research and development of photovoltaic precision testing equipment, and has newly launched the JW-IV12 portable IV tester. With four core advantages of lightweight body, full high voltage adaptation, high-speed scanning algorithm, and integrated environment acquisition module, it creates a mobile energy testing solution that covers…
READ MORE
The performance testing of photovoltaic modules IV, evaluation of solar energy resources, verification of power plant power, and conversion of STC standard operating conditions all rely on accurate and stable irradiation and temperature benchmark data. The ordinary civilian radiation meters on the market generally have problems such as poor spectral matching, large measurement errors, severe temperature drift, inability to link with professional detection equipment, bulky and inconvenient body, etc. Separating the recording of light and temperature data for manual conversion can easily produce double errors, directly leading to misjudgment of component power and causing disputes in operation and maintenance rectification and engineering acceptance. Jiangsu Jingwei Technology has matched its own IV and EL detection equipment ecosystem and launched the JW-F04 portable irradiance meter, equipped with a second level standard professional sensing unit, to achieve high-precision acquisition of dual parameters of irradiation and temperature synchronization. The lightweight portable body is suitable…
READ MORE
Microscopic defects such as hidden cracks, virtual soldering, broken grids, and PID attenuation inside photovoltaic modules are the core causes of long-term power generation decline and rising operation and maintenance costs in power plants. Traditional laboratory EL testing equipment has a large volume and can only operate in indoor darkrooms. Old portable EL equipment has shortcomings such as blurred imaging, inability to operate under strong light, dependence on manual visual screening for defects, and bulky and difficult to transport equipment, which cannot meet the batch testing needs of dispersed photovoltaic sites such as mountainous areas, floating areas, and household roofs. Jiangsu Jingwei Technology focuses on the outdoor photovoltaic non-destructive testing track and has launched the JW-EL2 portable EL detector. With four core advantages of 24.16 million pixel high-definition infrared imaging, all-weather anti stray light optical system, AI automatic defect recognition, and lightweight complete portable design, it achieves uninterrupted and accurate…
READ MORE
Against the backdrop of the large-scale development of the domestic photovoltaic industry and the surge in demand for the operation and maintenance of existing power stations, rapid verification of on-site component performance, precise troubleshooting of faults, and compliance certification of completion data have become common necessities in the industry. Traditional IV detection equipment has pain points such as slow sampling speed, large parameter calculation errors, dependence on manual curve interpretation, and bulky outdoor carrying, making it difficult to adapt to complex field scenarios such as distributed roofs, mountain photovoltaics, and floating power stations. Jiangsu Jingwei Technology has been deeply involved in the research and development of photovoltaic testing instruments for many years. With the accumulation of independent sensing and algorithm technology, it has launched the JW-IV12 portable IV tester, which has four core advantages: high-precision measurement, AI intelligent diagnosis, lightweight three proof design, and full system compatibility. It has opened…
READ MORE
The DC side of the photovoltaic system carries high-voltage DC voltage for a long time. The insulation layer inside the component cables, combiner boxes, and inverters is susceptible to insulation degradation due to moisture, aging, and external damage, which can cause leakage, grounding short circuits, inverter burnout, and even fire safety accidents. According to GB/T 35694 Photovoltaic Power Station Safety Regulations and IEC 62446 International Photovoltaic Safety Standards, special testing of system insulation resistance must be completed for grid connection acceptance and quarterly operation and maintenance inspections of photovoltaic power stations. Traditional universal megohmmeters are not optimized for photovoltaic active DC systems, and are susceptible to interference from component spontaneous currents during measurement, resulting in numerical distortion and inability to accurately determine insulation faults; Large scale photovoltaic insulation equipment is bulky and not suitable for on-site testing of distributed small-scale power stations on rooftops and households. Jiangsu Jingwei is deeply…
READ MORE
Solar irradiance is a core benchmark parameter for evaluating the power generation performance of photovoltaic modules, calculating the theoretical power generation of power plants, correcting IV test data, and conducting photovoltaic resource assessments. The accuracy of irradiance measurement directly determines the authenticity and effectiveness of photovoltaic detection data. At present, there are generally two types of measurement pain points in the industry: poor accuracy of simple handheld irradiation sensors and large temperature drift errors, which cannot meet the grid connected acceptance measurement standards; Large fixed radiation monitoring equipment is cumbersome to install and cannot be moved, making it impossible to achieve flexible multi-point sampling of photovoltaic systems on roofs, slopes, and mountains. In response to the demand for full field photovoltaic energy measurement, Jiangsu Jingwei Technology has independently developed the JW-F04 portable irradiance meter, which adopts a second level standard photovoltaic irradiance sensing chip and is equipped with intelligent environmental…
READ MORE
During the long-term operation of photovoltaic power plants, internal defects such as hidden cracks, broken grids, virtual soldering, black core chips, and fragments are easily caused by module transportation bumps, construction trampling, extreme weather thermal expansion and contraction, and long-term PID attenuation. These hidden dangers cannot be identified through visual inspection or IV performance testing. Long term existence will continue to reduce the power generation of modules, and in severe cases, may trigger hot spot fires, causing huge economic and safety losses to photovoltaic power plants. Traditional EL detection equipment is mostly fixed large-scale instruments that can only be used indoors in factories, and there is a lack of lightweight imaging equipment for outdoor power station inspections; Early split type portable EL devices had shortcomings such as blurred imaging, inability to detect strong light during the day, need for external power supply, and multi person collaborative operation, which greatly restricted…
READ MORE
