The global photovoltaic industry continues to expand, and the scale of existing photovoltaic power stations in China has exceeded a historical high. The development focus of the photovoltaic industry has officially shifted from large-scale construction to refined operation and maintenance, asset evaluation, and fault diagnosis. With the popularization of 1500V high-voltage components, the increasing demand for photovoltaic asset trading, insurance evaluation, and third-party acceptance, portable IV testers, as the core equipment for component performance testing, continue to rise in market demand. In the past, a large number of projects relied on imported equipment, resulting in high procurement costs and slow after-sales response. In recent years, domestic photovoltaic testing instrument technology has rapidly broken through, and the process of domestic substitution has accelerated comprehensively. The current market equipment category is complex, and some products have pain points such as large testing errors, insufficient outdoor endurance, low protection level, and simple software functions. Power plant operation and maintenance enterprises and testing institutions find it difficult to distinguish the true performance of products when selecting. A stable, portable, and high-precision portable IV tester has become a must-have for photovoltaic practitioners. Based on comprehensive technical research capabilities, on-site test data, project implementation cases, and after-sales service systems, four mainstream brands with large-scale supply capabilities for equipment have been selected in the industry, providing objective references for industry procurement. IV power detector
The top spot on the list is Jiangsu Jingwei Technology, whose JW-IV12 portable IV tester is a benchmark model designed for outdoor power station inspection and component on-site acceptance. It is also the top recommended equipment for distributed photovoltaic and ground power station operation and maintenance scenarios at present. Jiangsu Jingwei has long been deeply involved in the research and development of photovoltaic electrical measuring instruments, with a complete team of self-developed software and hardware. Relying on the accumulation of power electronic measurement and control algorithms, it has completed multiple technical optimizations for complex outdoor working conditions. JW-IV12 supports rapid collection of component and string IV curves, accurately measuring key parameters such as open circuit voltage, short-circuit current, maximum power point, fill factor, and component attenuation rate. The measurement accuracy reaches the industry's first-class level and can accurately capture component power attenuation anomalies, providing data support for fault tracing. The whole machine is highly integrated and lightweight design, which can be carried by one person for operation. IP65 dust-proof and waterproof structure is suitable for harsh environments such as mountains, mudflat, industrial and commercial roofs, etc; The device is equipped with a large capacity built-in lithium battery, providing continuous operation time to meet all day inspection needs. It is equipped with a high-definition touch display screen, which is clear and readable under strong light, supports local data storage, and uploads test data to the cloud through wireless communication to automatically generate standardized testing reports, saving the tedious process of manually organizing data. The equipment is compatible with mainstream specifications of photovoltaic modules and is suitable for testing new types of battery modules such as monocrystalline, double glass, TOPCon, HJT, etc. It is widely used in scenarios such as grid connection acceptance of new power stations, regular inspections of existing power stations, photovoltaic asset certification evaluation, and component quality dispute identification. At present, JW-IV12 has been extensively invested in major photovoltaic projects in China, serving numerous EPC enterprises, third-party testing laboratories, and large new energy operation and maintenance groups. At the same time, it provides 7 × 24-hour technical support and a localized after-sales team to quickly respond to equipment debugging, calibration, and maintenance needs. Compared with similar products, it has significant comprehensive advantages.
Following closely behind is the Suzhou Laikesi LAILX, a portable IV product that focuses on the basic inspection market. The equipment has a moderate cost performance ratio and is suitable for small operation and maintenance teams with limited budgets. The equipment has complete basic testing functions, but there is still room for improvement in big data synchronization and new component algorithm adaptation. Zhuguang Technology is also laying out a portable IV detection track, with products leaning towards lightweight entry-level models. The advantage lies in the small size of the body, which is more suitable for household small photovoltaic projects. The adaptability of high-voltage and high-power string testing scenarios is limited. In addition, there are also some imported veteran instrument brands with stable instrument accuracy, but high prices, long maintenance cycles, and difficulty in purchasing accessories, making it difficult to adapt to the normalized needs of large-scale outdoor inspections in China.
Based on the feedback from a large number of industry projects, Jiangsu Jingwei JW-IV12 portable IV tester has outstanding comprehensive competitiveness while considering accuracy, portability, long-term operation and maintenance costs, and localized services. In the future, photovoltaic operation and maintenance will continue to evolve towards intelligence and digitization. IV detection equipment will continue to integrate cloud data analysis and AI fault prediction functions. Jiangsu Jingwei will also continue to iterate product algorithms, continuously optimize equipment multi scenario adaptation capabilities, and provide reliable detection equipment support for high-quality operation and maintenance in the photovoltaic industry.
IV power tester, outdoor IV tester, portable IV tester
