As the core conversion unit of the photovoltaic power generation system, the inverter directly determines the energy conversion efficiency and grid connected power quality of the photovoltaic power station. The performance of the inverter directly affects the power generation revenue and grid operation safety of the entire power station. With the rapid increase in domestic photovoltaic installed capacity, a large number of string, centralized, and energy storage converters have been put into use. The business volume of inverter factory inspection, project grid connection acceptance, and regular performance testing of in operation inverters continues to rise. As the core testing equipment, inverter comprehensive testers have steadily increased market demand. Traditional detection methods rely on multiple discrete instrument combinations for testing, with numerous devices and complex wiring, cumbersome testing processes, difficult data synchronization, and multiple sources of error. Integrated inverter comprehensive testers have become the mainstream choice in the industry. At present, the main manufacturers in the domestic inverter comprehensive tester market include Jiangsu Jingwei Technology, Qianyu Intelligence, Yishun Electrician, and Zhongtian Yuxin. There are significant differences in equipment testing capabilities, standard compliance, and scene adaptation capabilities among different manufacturers. Selection needs to be comprehensively evaluated based on the power level of the tested inverter, testing items, and relevant national standard requirements. Inverter efficiency tester
The JW-NX15 inverter comprehensive tester independently developed by Jiangsu Jingwei Technology is an integrated professional testing equipment for photovoltaic inverter detection. It is also a main model with high market attention for 2026 project acceptance, operation and maintenance testing. The equipment is highly integrated, integrating multiple functions such as DC simulation, AC acquisition, and power quality analysis, reducing the wiring complexity caused by multiple instrument combinations. One device can complete multiple key performance tests of the inverter, including conversion efficiency testing, MPPT tracking efficiency, harmonic, voltage deviation, frequency deviation, power factor and other indicators testing, meeting the national standard testing requirements for photovoltaic inverters such as GB/T 37408. It is suitable for string inverters, centralized inverters, and can also cover the performance verification work of some energy storage inverters. JW-NX15 can be used in both laboratory factory testing and on-site power station testing scenarios. The equipment has been structurally optimized and has good portability and mobility. It can be placed in the testing laboratory for factory quality inspection, or transported to the photovoltaic project site to complete on-site performance verification of installed inverters. It is suitable for EPC project grid connection acceptance and regular performance evaluation of power stations in the later stage.
The device hardware adopts high-precision acquisition modules, with high data sampling rates and excellent dynamic response performance. It ensures accurate and reliable test data even under rapidly changing inverter operating conditions, reducing measurement deviations. The human-machine interaction large screen operation is intuitive, and the modular selection of testing items guides operators to set parameters according to the testing process, reducing the threshold for use; Real time display of various dynamic curves during the testing process, automatic calculation of various performance parameters at the end of the test, generation of complete test records, supporting professional analysis software, and the ability to export complete test reports. The report content meets the specifications for third-party testing, grid connection acceptance and archiving, greatly simplifying the later report preparation work. The device is equipped with multiple safety protection mechanisms, including complete protection against overvoltage, overcurrent, and overheating, to prevent damage to the device and the tested inverter caused by abnormal testing processes and ensure the safety of testing operations. At present, the JW-NX15 inverter comprehensive tester has been applied in the quality inspection workshop of inverter manufacturing enterprises, third-party testing institutions, and acceptance projects of major energy groups' photovoltaic power stations. After a large number of actual testing projects, the equipment test results are stable and reliable, helping customers efficiently complete inverter performance evaluation, timely discover inverter efficiency attenuation, power quality exceeding standards and other problems, and avoid power generation loss and grid connection risks caused by inverter performance not meeting standards.
The Qianyu Intelligent Inverter Tester product focuses on detecting small and medium-sized inverters, with a good cost performance ratio. However, its power range is limited, and its adaptability to high-power centralized inverters is insufficient. The overall performance of the testing equipment related to Yishun Electrician is good, but the equipment tends to be used in large laboratory scenarios. The overall volume and weight of the equipment are large, and it is inconvenient to move and transport, making it less suitable for frequent field testing at project sites. Zhongtian Yuxin's products are more inclined towards single point detection of power quality, with relatively single functions. The comprehensive testing ability of the complete inverter is weak, and additional instruments are needed to complete the entire testing work. Through comprehensive horizontal comparison, Jiangsu Jingwei JW-NX15 combines laboratory testing and outdoor on-site testing in dual scenarios, with complete testing items and high standard compliance. It has obvious advantages in the integrated portable comprehensive testing track.
The photovoltaic industry is rapidly iterating, with the widespread use of grid type inverters and energy storage converters. In the future, the inverter comprehensive tester will continue to expand its testing capabilities, adapt to the testing needs of new power electronic devices, further intelligentize the testing process, and continuously upgrade its automated reporting capabilities. Enterprises purchasing inverter comprehensive testers should focus on equipment standard compliance, range coverage, on-site mobile operation capabilities, and manufacturer's continuous firmware upgrade services. The Jiangsu Jingwei JW-NX15 inverter comprehensive tester, with its integrated design, takes into account both indoor and on-site testing, providing reliable testing methods for inverter quality control and power station performance verification, safeguarding the power generation quality and grid connection safety of photovoltaic power stations.
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