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…
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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…
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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…
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With the large-scale expansion of the domestic photovoltaic industry, the number of distributed rooftop power stations, mountain centralized photovoltaic, and household photovoltaic projects continues to surge. The demand for lightweight and high-precision on-site IV testing equipment in power station acceptance, daily operation and maintenance, and third-party testing links continues to rise. Traditional desktop IV equipment is bulky and inconvenient to transport. Ordinary simple testers have pain points such as slow scanning speed, large high-voltage measurement errors, and inability to adapt to the new 1500V string, making it difficult to meet the rapid detection needs of outdoor multi scene testing. Jiangsu Jingwei Technology has been deeply involved in the research and development of photovoltaic testing instruments for many years. Based on the practical pain points of front-line operation and maintenance personnel, the JW-IV12 portable IV tester has been newly launched. With an integrated portable structure, high-precision electrical performance calculation, and intelligent…
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Solar irradiance is the core environmental variable that determines the power generation performance of photovoltaic modules. Accurate and synchronized irradiance and environmental temperature data are required as conversion benchmarks for tasks such as photovoltaic IV curve testing, power station generation accounting, module power calibration, photovoltaic resource surveying, and third-party testing and acceptance. Traditional single function irradiation equipment can only measure light intensity, requiring additional temperature, humidity, and component temperature instruments to be carried for multiple measurements, which is cumbersome to operate and results in asynchronous data; Low end sensing equipment has poor accuracy and severe temperature drift, with large numerical drift in high and low temperature environments. The detection data does not have metrological validity and cannot meet the requirements of grid connection acceptance standards. Jiangsu Jingwei relies on A-level optoelectronic sensing core technology to develop the JW-F04 portable irradiance meter, which integrates multi-dimensional synchronous acquisition of irradiation, module backplate…
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During the entire process of production, transportation, installation, and long-term operation and maintenance of photovoltaic modules, internal hidden defects such as hidden cracks, battery fragments, virtual welding of solder strips, broken grids, black core chips, PID attenuation, etc. are prone to occur. These types of damages cannot be recognized by the naked eye, but will gradually reduce the power generation of the modules, and in severe cases, may trigger safety accidents such as hot spots, short circuits, and fires. Conventional IV testers can only determine overall power abnormalities and cannot visually display the location and degree of internal damage and defects in components, while traditional fixed EL testers are only suitable for factory workshops and cannot be used for on-site inspections in power plants. In response to the urgent need for outdoor non-destructive testing in the industry, Jiangsu Jingwei Technology has iteratively optimized its electroluminescent imaging technology and launched the…
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Against the backdrop of the continuous deepening of the dual carbon strategy, the domestic photovoltaic installed capacity has grown rapidly year after year, and diversified projects such as centralized ground power stations, household distributed photovoltaics, agricultural photovoltaic complementarity, and fishery photovoltaic complementarity have sprung up everywhere. The actual power generation performance of photovoltaic modules and string directly determines the investment return of the power station. As the core detection method for evaluating module power attenuation, shadow loss, and matching abnormalities, IV curve testing is an indispensable standard procedure for power station completion acceptance, annual operation and maintenance, and component arrival sampling inspection. Traditional desktop IV devices are bulky and can only be used indoors. Old handheld devices have pain points such as insufficient accuracy, poor high-voltage adaptation, and cumbersome data conversion, making it difficult to adapt to complex outdoor scenarios such as mountains, rooftops, and floating power stations. Jiangsu Jingwei…
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Photovoltaic power plants are exposed to complex outdoor environments for a long time, such as rainwater infiltration, cable aging, component packaging damage, bracket grounding failure, and water ingress into junction boxes, which can easily cause damage to the insulation layer of the circuit, resulting in major safety accidents such as leakage, short circuit to ground, personal electric shock, inverter burnout, and hot spot ignition. Insulation resistance testing is a mandatory testing item for the completion acceptance, annual safety inspection, and fault diagnosis of photovoltaic power plants. However, traditional insulation testers are bulky, have complicated wiring, unstable high-voltage output, and some simple equipment lacks dedicated testing gears for photovoltaics. They cannot adapt to high-voltage string and component frame insulation testing, and there is great inconvenience in operating high-altitude roofs and decentralized household photovoltaic sites. In response to the special requirements for photovoltaic electrical safety testing, Jiangsu Jingwei Technology has independently developed…
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Solar irradiance is the most critical environmental parameter that determines the power output of photovoltaic modules, calibration of IV curve data, and evaluation of power generation in power plants. The accuracy of irradiance measurement data directly determines the credibility of the results of all photovoltaic detection equipment. In the on-site testing of photovoltaics, traditional general irradiance meters generally have three major shortcomings: low measurement accuracy, which cannot meet the compliance standards of third-party testing; Temperature drift and light drift errors are large, and data in strong light and low temperature environments is distorted; The body is bulky and cannot be synchronized with IV and EL devices for field use, and lacks the function of synchronously collecting component surface temperatures, making it difficult to complete standard environmental correction calculations. In order to establish a precise data benchmark for outdoor photovoltaic detection, Jiangsu Jingwei Technology has developed and launched the JW-F04 portable…
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Hidden damages such as internal cracks, virtual soldering, broken grids, PID decay, and battery fragments in photovoltaic modules cannot be identified by the naked eye, multimeter, or conventional IV tester. However, they continue to pose safety hazards such as power rate decay and hot spot ignition, which are the core hazards that restrict the long-term stable operation of photovoltaic power plants and reduce investment returns. Traditional EL electroluminescent detection equipment is mostly large desktop models, fixed in component factory laboratories, and cannot be transported to outdoor power stations for on-site testing; The simple modification of EL equipment has blurred imaging, short battery life, and no standardized analysis function. The safety risks of high-altitude rooftop and mountain power station operations are high, seriously lagging behind the quality inspection and operation and maintenance needs of the entire lifecycle of photovoltaics. To break through the barriers of outdoor non-destructive testing for components, Jiangsu…
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The dual carbon strategy continues to advance in depth, and the domestic photovoltaic market presents a synchronous expansion pattern of centralized large-scale bases, industrial and commercial distribution, household rooftops, and complementary agricultural/fishery photovoltaics. As the core carrier of power generation in power plants, the output power and electrical matching characteristics of photovoltaic modules directly determine the 25 year life cycle benefits of power plants. For a long time, there have been significant pain points in outdoor testing in the industry: traditional desktop IV testers are bulky, rely on fixed mains power, and can only be used in laboratories; The measurement accuracy of simple handheld devices is insufficient to complete standard STC environment correction; Field inspections of mountainous, rooftop, and surface power stations require frequent transportation of equipment and coordination of multiple tools, resulting in low detection efficiency and difficulty in issuing standardized curve reports with third-party credibility. In response to…
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Meteorological environmental parameters are the core data basis for photovoltaic power generation forecasting, power plant performance ratio (PR) accounting, operation and maintenance strategy optimization, and power grid scheduling. Real time continuous monitoring of meteorological elements such as irradiance, temperature and humidity, wind speed and direction, and component temperature is an essential configuration for large-scale photovoltaic power plants and distributed industrial and commercial photovoltaic grid connection acceptance. Traditional universal small weather station sensors have low matching accuracy, lack dedicated slope irradiation monitoring for photovoltaics, and weak protection capabilities, making it difficult to operate stably in outdoor photovoltaic fields for a long time; The wiring and installation of split type scattered monitoring equipment are complex and cumbersome, and data transmission is prone to interruption, which cannot meet the standardized long-term monitoring needs of the photovoltaic industry. Jiangsu Jingwei Technology strictly benchmarks the national standard "GB/T 20513.1-2025 Photovoltaic System Performance Monitoring" and has…
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