Against the backdrop of the continuous implementation of China's dual carbon strategy and the parallel development of photovoltaic power station stock expansion and new construction projects, photovoltaic module performance testing, power station completion acceptance, and performance survey of old power stations have become essential needs in the industry. Traditional large-scale desktop IV testing equipment is bulky and difficult to transport, making it difficult to adapt to scattered inspection scenarios such as rooftop distributed, mountain photovoltaic, and household photovoltaic. Jiangsu Jingwei Technology has been deeply involved in the research and development of photovoltaic testing instruments for many years. Relying on self-developed circuit algorithms and lightweight structural design, it has launched the JW-IV12 portable IV tester, which has laboratory level testing accuracy, integrated portable body, and full specification component compatibility, filling the gaps in photovoltaic field performance testing and becoming the core inspection equipment for EPC general contractors, third-party testing institutions, and power station operation and maintenance enterprises. Outdoor IV tester
JW-IV12 achieves multiple technological breakthroughs at the core hardware level, with a total weight control of less than 3kg and a portable protective suitcase. It can be carried and transported by a single person with bare hands, making it easy to climb onto rooftop photovoltaic brackets and shuttle mountain photovoltaic arrays, completely eliminating the operational difficulties of traditional instruments that require forklifts and multiple people to transport. The equipment is equipped with high-frequency high-speed sampling chips and adaptive intelligent electronic loads, with a voltage measurement range covering 0-1500V and a current range of 0-30A. It is compatible with mainstream N-type, P-type components, single/double glass components, and different specifications of photovoltaic strings. The complete IV curve and PV power curve acquisition of a single component only takes 8-12 seconds, and the efficiency of large-scale power plant inspections is improved by more than 60% compared to traditional equipment. The instrument is equipped with high-precision temperature and radiation sensing modules, which can collect real-time environmental temperature and solar radiation data on site. Based on the built-in STC standard algorithm, the measured parameters are automatically converted to standard testing conditions, accurately outputting more than 20 key parameters such as component peak power, open circuit voltage, short-circuit current, fill factor, series internal resistance, conversion efficiency, etc., effectively avoiding testing errors caused by variable lighting and uneven temperature fields. The detection data can be directly used for power plant acceptance filing and fault tracing.
Intelligent configuration is a prominent feature of JW-IV12. The device adopts a high-definition touch screen with dual operation modes of physical buttons, and can read clearly in strong light outdoor, rainy and dim environments; Built in Beidou+GPS dual-mode positioning module, each test data is automatically bound to geographic location and testing time, with dual channels of 4G wireless transmission and USB data export. The detection report is generated in PDF format with one click, seamlessly integrated with the power station operation and maintenance management system, realizing cloud archiving of detection data and real-time retrieval of historical data. JW-IV12 can quickly locate abnormal strings and accurately distinguish between natural aging and construction damage problems through curve distortion features, in response to common faults such as hidden cracks, hot spots, virtual connections, and power attenuation in the industry. It provides quantitative data support for operation and maintenance personnel to develop cleaning, replacement, and maintenance plans.
At present, this instrument has been widely used in large-scale ground photovoltaic power stations in Northwest China, distributed rooftop projects for industrial and commercial buildings in Jiangsu, Zhejiang, and Shanghai, and rural household photovoltaic acceptance projects. JW-IV12 covers the entire lifecycle testing of photovoltaics, from component factory inspections and on-site verification upon arrival, to annual performance audits after the power station is put into operation and evaluations of the upgrading and renovation of old photovoltaics. Jiangsu Jingwei has a well-equipped after-sales technical service system, with technical service outlets established in multiple parts of the country, providing full cycle services including equipment calibration, operation training, and firmware upgrades. In the future, enterprises will continue to iterate algorithms, expand the testing functions of energy storage photovoltaic modules and BIPV building materials photovoltaics, rely on the advantages of domestic technology, promote the standardization and portability of on-site photovoltaic testing in China, and empower the high-quality development of the clean energy industry with precision instruments
Outdoor IV tester, photovoltaic power station IV power detector, IV power detector
