With the rapid development of the domestic new energy industry, the scale of photovoltaic installed capacity continues to climb. Large scale ground power stations, industrial and commercial distributed projects, and household photovoltaics continue to land, and the focus of industry development is gradually shifting from large-scale construction to refined operation and maintenance and full life cycle quality control. The large-scale popularization of 1500V high-voltage systems has led to the widespread use of TOPCon and HJT large-size components. However, traditional detection equipment has become increasingly prominent in terms of insufficient range, bulky and inconvenient, and low testing efficiency. As the core means of evaluating the actual power generation performance of photovoltaic modules and strings, on-site IV curve testing has put forward higher requirements for equipment range, accuracy, portability, and environmental adaptability. Based on the actual pain points in the industry, Shanghai LAILX Laikos has launched the LX-PV31 portable IV tester, providing reliable hardware support for photovoltaic power plant acceptance, fault diagnosis, and third-party testing. Photovoltaic power station IV power detector

The core hardware of the LX-PV31 portable IV tester is benchmarked against cutting-edge industry standards, with a maximum open circuit test voltage of 1500V and a short-circuit current of 30A. It is fully compatible with current mainstream high-voltage photovoltaic systems, compatible with 182 and 210 large-sized high-efficiency components, and can complete component and string performance testing in the range of 50W-30kW, freeing itself from the range constraints of traditional 1000V equipment. The equipment is equipped with a self-developed high-speed and high-precision sampling chip, paired with a wide linear electronic load, to complete signal acquisition in milliseconds. A single complete IV and PV curve scan only takes 10 seconds, synchronously outputting more than 20 key parameters such as open circuit voltage, short-circuit current, peak power, fill factor, series parallel internal resistance, conversion efficiency, etc. The overall testing error of the whole machine is controlled within ± 0.5% ± 0.2V, and the measurement data is stable and reliable. It can be directly used as an effective basis for power plant filing and quality judgment. The device is equipped with an STC standard operating condition conversion model, combined with external irradiation sensors and backplate temperature probes, to automatically complete data conversion without the need for manual secondary calculations, greatly reducing the data processing pressure of on-site personnel.

For complex outdoor work scenarios, the LX-PV31 has undergone extensive optimization in terms of portability and environmental adaptability. The whole machine is integrated and sealed, with a weight of less than 6kg without accessories. It is stored in an earthquake resistant protective box and can be easily transported by a single person. It can be easily carried out in traffic restricted areas such as mountainous power stations, rooftop distributed power stations, and floating fishery photovoltaic complementary power stations. The body is equipped with a high brightness touch color screen visible under sunlight, while retaining physical buttons. Maintenance personnel can also operate smoothly wearing insulated gloves. The operating system is bilingual in Chinese and English, and beginners can get started with it after a brief training. Wireless interconnection technology enables radiation and temperature probes to communicate with the host up to 100 meters away, eliminating the hassle of dragging cables on site and improving operational safety and convenience. The device supports barcode scanning to input component information, can store more than 2000 sets of test data locally, supports SD card expansion, can export data with one click on site, and is equipped with professional analysis software on the computer side. It can batch analyze curves and automatically output standardized testing reports, meeting the batch testing needs of third-party testing institutions and large operation and maintenance enterprises.

In terms of battery life, the LX-PV31 is equipped with a large capacity lithium battery, which can complete more than 300 complete IV tests when fully charged. It can ensure all day inspection work in outdoor environments without external power supply. The whole machine is dustproof and moisture-proof, and can adapt to harsh working conditions such as desert, coastal salt spray, high temperature and low temperature. The equipment has a low failure rate and reduces maintenance costs in the later stage. In actual project implementation, LX-PV31 is widely used for power station completion acceptance, annual preventive testing, and tracing of abnormal power generation faults. When the power station experiences phenomena such as low string power generation and inverter alarms, operation and maintenance personnel can quickly complete multiple string comparison tests, accurately locate degraded string performance, guide subsequent maintenance and replacement work, and reduce power generation losses.

The current photovoltaic industry operation and maintenance market continues to expand, and cost reduction and efficiency improvement have become industry consensus. The LX-PV31 portable IV tester combines multiple advantages such as high voltage range, measurement accuracy, and portability and ease of use. It is suitable for on-site inspections by operation and maintenance enterprises, as well as factory sampling by component factories and quality verification by third-party organizations. Shanghai LAILX continues to deeply cultivate the photovoltaic testing track, adhering to independent technology research and development, polishing products around the full life cycle testing needs of power plants. The practical application of LX-PV31 effectively shortens the on-site testing period, reduces manpower investment, and helps the photovoltaic industry achieve high-quality and high-efficiency operation and maintenance, empowering the steady development of the new energy industry.

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