In the current era of continuous iteration and upgrading in the photovoltaic industry, double-glass double-sided modules have become the mainstream choice for ground-mounted power plants and industrial and commercial distributed projects, thanks to their higher power generation yields and longer service life. However, the unique power generation structure of double-sided modules poses significant challenges for on-site performance testing. Traditional IV testers cannot distinguish between the power generation contributions of the front and back sides of the modules, and the continuously increasing voltage and current specifications of high-power strings also make older equipment inadequate in range, resulting in large deviations in test results and constraining the acceptance, operation, maintenance, and defect elimination of power plants. Shanghai LAILX has been deeply involved in the field of photovoltaic testing equipment for many years. In response to industry pain points, it has launched the LX-PV33 portable IV tester, which redefines the standard for IV performance testing of photovoltaic modules and strings with a high voltage of 2000V, a large current range of 40A, and a self-developed multi-irradiation correction algorithm. It provides reliable hardware support for quality control throughout the entire life cycle of photovoltaic power plants. Current, voltage, and power curve tester

The core hardware of the LX-PV33 portable IV tester is equipped with an industrial-grade high-precision sampling chip and a dynamic capacitance simulation circuit. High-density sampling enables the complete plotting of component IV characteristic curves, accurately extracting five core parameters: open-circuit voltage, short-circuit current, maximum power, fill factor, and conversion efficiency. The measurement error is controlled within ±0.3%, and the test data complies with the GB/T national standard for photovoltaic module performance testing. The test report issued can be directly used for grid-connected filing of power stations, third-party quality assessment, and project completion acceptance. Addressing the pain points of testing double-glass double-sided components, the device incorporates LAILX's proprietary multi-irradiation intelligent algorithm, which automatically shields interference from backplane power generation values and independently measures the power of front-side cells under STC standard test conditions. There is no need for manual shielding of the component backplane, significantly reducing on-site operational workload and solving the long-standing industry problem of only being able to roughly estimate the performance of double-sided components.

In terms of on-site operational efficiency, the LX-PV33 achieves a leapfrog improvement in detection speed. It takes only 10 seconds to complete a complete IV curve test for a single module, and the detection time for an entire string of modules does not exceed one minute. It can complete batch testing of more than 120 modules in a single day, representing a detection efficiency increase of over 60% compared to traditional equipment. The device is equipped with a 7-inch high-definition touch screen in both Chinese and English, which provides excellent visibility in strong outdoor light. It adopts a dual operation mode of touch and physical buttons, suitable for outdoor operations with gloves. The built-in specification database covers hundreds of module manufacturers both domestically and internationally, supporting automatic matching of module parameters through barcode scanning, eliminating the need for operation and maintenance personnel to manually enter models. Even personnel with no basic knowledge can complete the entire testing process independently after a brief training. The entire device is equipped with a high-capacity rechargeable lithium battery, which can support all-day outdoor inspection operations when fully charged. The body is enclosed in a high-strength engineering protective case, providing dustproof, waterproof, and drop-resistant capabilities, suitable for various complex power station on-site environments such as mountains, water surfaces, and rooftops.

The device is equipped with a variety of peripheral expansion interfaces, supporting local storage via USB flash drives and wireless data transmission. All test data and IV curve images are automatically saved and can be imported into the accompanying PC-side data analysis software for batch export of reports, comparison with historical data, and tracking of component power attenuation trends. The product is widely used in scenarios such as incoming inspection during the construction phase of photovoltaic power stations, grid connection acceptance, annual operation and maintenance inspection, component fault diagnosis, and field testing by third-party testing institutions. It can not only perform spot checks on the performance of individual components but also complete batch performance screening of entire strings, quickly identifying issues such as power attenuation, mismatch, and performance degradation due to hidden cracks.

With the continuous upgrading of photovoltaic (PV) module technology, the market share of high-power, double-sided double-glass (DSG) products continues to rise. Power plant owners, EPC companies, and third-party testing institutions are placing higher demands on the accuracy, range, and level of intelligence of on-site IV testing equipment. The Shanghai LAILX LX-PV33 portable IV tester, with its precise and reliable detection capabilities, strong DSG adaptability, and portable and efficient on-site user experience, helps industry practitioners quickly complete module performance evaluation, promptly identify potential quality defects, reduce power loss in power plants, and ensure long-term stable returns on photovoltaic assets. In the future, LAILX will continue to iterate photovoltaic testing technology, continuously improve its product matrix, and provide a stable and reliable integrated testing solution for the global photovoltaic industry.

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