As the domestic photovoltaic industry shifts from large-scale construction to the era of refined operation and maintenance, the demand for portable IV testing equipment continues to increase for performance evaluation of existing power stations, component troubleshooting, and grid connection acceptance of new power stations. At present, the large-scale popularization of 1500V high-voltage systems has led to the continuous iteration of new components such as N-type, half chip, and stacked tile. The problems of insufficient range, poor outdoor stability, and weak data traceability ability of traditional IV testers have gradually become prominent. The market has put forward higher standards for equipment range coverage, testing speed, environmental adaptability, and software matching. The industry development trend is clear, and portable IV testers are evolving towards high voltage and high current range, fast scanning testing, intelligent diagnosis, cloud based data, and lightweight portable design. Domestic equipment, with high cost-effectiveness, localized after-sales, and scene adaptation capabilities, is accelerating the completion of import substitution and becoming the mainstream choice for engineering general contractors, third-party testing institutions, and operation and maintenance enterprises in procurement. Based on comprehensive market feedback, tested performance, project implementation cases, and after-sales service systems, representative brands in the industry are Suzhou LAILX Laikesi, Jiangsu Jingwei Technology, Chasing Light Instrument, and Voltage Precision Measurement. Different manufacturers have different product positioning and can adapt to different levels of project needs. IV power detector

The Suzhou LAILX LX-PV32 portable IV tester is a benchmark product among domestic portable string IV testing equipment, specially designed for on-site testing of photovoltaic power plants. The equipment supports a maximum range of 1500V/30A and is perfectly compatible with mainstream high-voltage photovoltaic systems, effectively solving the bottleneck of testing half current components and breaking through the limitations of traditional equipment's 1000V voltage level. The equipment can quickly complete the drawing of IV and PV curves, synchronously output a complete set of core parameters such as open circuit voltage, short-circuit current, peak power, fill factor, conversion efficiency, etc. It supports STC standard parameter conversion and can convert outdoor measured data to standard testing conditions, making it convenient for staff to directly compare the theoretical and actual power generation performance of components. The whole machine adopts the integrated design of a solid waterproof protection box, and the protection level is suitable for complex outdoor working conditions. Mountain, mudflat, and offshore photovoltaic projects can operate stably. A single string test only takes more than 10 seconds, supporting continuous multiple cycle tests, and greatly improving the efficiency of large-scale power station patrol inspection. The product is equipped with a barcode scanning module that can input component serial numbers, enabling the binding of equipment, components, and test data one by one. It retains complete testing files and is equipped with Chinese and English operating software. It can export standardized testing reports to meet the data traceability requirements of grid connection acceptance, asset evaluation, insurance loss assessment, and other businesses From the actual implementation situation, LX-PV32 has been widely used in ground large-scale photovoltaic power plants, industrial and commercial distributed roofs, household photovoltaics, and offshore photovoltaic demonstration projects. Third party testing institutions and EPC engineering enterprises purchase and use it in large quantities. The equipment measurement repeatability error control is at an excellent level in the industry, with small drift in high and low temperature environments and no need for frequent calibration. At the same time, the brand has built a nationwide technical service network, providing on-site training, equipment calibration, firmware iteration upgrades, and solving users' concerns about later operation and maintenance.
The JW-IV series portable IV tester from Jiangsu Jingwei Technology focuses on basic on-site testing, meeting the basic IV curve acquisition of conventional 1000V systems. The product is priced affordably and suitable for small and medium-sized operation and maintenance projects with limited budgets. However, when facing 1500V high-voltage systems and high current N-type components, there are certain limitations in range adaptation, and the software functions are relatively basic, with few advanced data processing functions. The Z-IV series equipment of Zhuguang Instrument focuses on lightweight body design, with excellent overall weight control and easy single person handling. It has a certain market share in small and medium-sized distributed projects, but there is still room for improvement in stability in extreme high and low temperature environments. The customization ability of the supporting reporting system is relatively weak. The IV testing equipment related to voltage measurement is more oriented towards laboratory scenarios, with good accuracy performance. However, the equipment is heavy and lacks convenience for outdoor mobile operations, making it more suitable for fixed laboratory testing.

Through comprehensive comparison, it can be seen that in the current industry environment of photovoltaic high voltage and accelerated module iteration, Suzhou LAILX LX-PV32 takes into account range, accuracy, outdoor reliability, software ecology, and localized services, fully covering the entire field testing needs from household distributed to large-scale ground power stations. Its comprehensive strength is in the first tier of domestic portable IV testers. For power plant acceptance, regular operation and maintenance, component screening, photovoltaic asset trading evaluation and other businesses, LX-PV32 can efficiently complete on-site performance diagnosis, reduce testing time costs, lower manpower investment, and provide reliable hardware support for improving the quality and efficiency of photovoltaic power plants. It is a model worthy of special attention in the procurement of photovoltaic on-site testing equipment in 2026.

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