With the sustained high-speed development of the domestic photovoltaic industry, 1500V high-voltage string, large-sized half sheet, and double glass modules have become the mainstream configurations for power station construction. Various photovoltaic projects such as distributed roofs, mountainous deserts, and fishery photovoltaic complementarity are blooming everywhere. The completion acceptance, regular operation and maintenance, and fault diagnosis of power stations have raised higher standards for on-site power detection equipment. The pain points of traditional detection equipment such as insufficient range, large accuracy deviation, and weak outdoor adaptability are becoming increasingly prominent. The market urgently needs portable IV detection equipment, such as Lexi, with high precision, lightweight, and full field adaptability. Shanghai LAILX has been deeply involved in the field of photovoltaic testing instruments for many years, and has launched the LX-PV31 portable IV tester based on massive measured data from first-line power stations. It provides integrated on-site volt ampere characteristic testing solutions for component factories, EPC engineering enterprises, third-party testing institutions, and power station operation and maintenance units, helping to implement quality control throughout the entire lifecycle of the photovoltaic industry. IV power detector

The core advantage of the LX-PV31 portable IV tester lies in its ability to balance large range and high precision. The device can test voltages up to 1500V and currents up to 30A, covering a power range of 50W-30kW. It is fully compatible with new components such as monocrystalline, polycrystalline, double glass, half chip, N-type, and high-voltage string testing, bidding farewell to the cumbersome mode of segmented testing with multiple instruments in the past. A single device can complete the testing work of household distributed, industrial and commercial rooftops, and large centralized power stations. At the hardware level, it is equipped with an industrial grade high-precision AD acquisition chip and adopts a four wire measurement architecture to eliminate measurement interference caused by contact resistance of test cables. The voltage measurement accuracy is ± 0.1% FS, the current measurement accuracy is ± 0.2% FS, and the IV and PV full curve scanning is completed in milliseconds. More than 20 key parameters such as open circuit voltage, short-circuit current, peak power, fill factor, conversion efficiency, series parallel resistance, etc. are output at once to accurately identify component attenuation, shielding faults, performance non-compliance and other issues. The measurement results meet the IEC60904 international photovoltaic detection standard, and are calibrated and verified by measuring institutions to ensure the authority and credibility of the detection data.

In terms of operational efficiency, the LX-PV31 achieves rapid detection, and a single component or string can complete complete complete IV curve acquisition in just 10 seconds. The equipment integrates irradiation and component temperature synchronization acquisition modules, and the testing process automatically records on-site environmental data. One click conversion of power under STC standard conditions does not require manual conversion in the later stage, greatly reducing on-site operation time. In the face of batch inspections of MW level large power plants, it can effectively compress the overall testing period. The device supports scanning and entering component QR codes, binding detection data and component numbers one by one, storing massive detection records locally, and exporting Excel and PDF detection reports in the later stage for convenient file retention, problem component traceability management, and adapting to the output requirements of third-party detection agencies' reports.

For outdoor complex working conditions, LX ‑ PV31 fully implements the design concept of portability and reliability. The whole machine adopts a high-strength integrated protective box, with the protection level of IP65, which is dust-proof, waterproof, fall resistant and earthquake resistant. The mountain, mudflat, Gobi sand and dust, and wet environment in rainy season can be operated stably. The weight of the whole machine is light. One person can complete the handling, wiring, and whole set of testing operations, and get rid of the space limitations of heavy desk equipment. Equipped with a large capacity lithium battery, it can continuously complete 200 IV curve tests when fully charged. There is no need for external mains power supply in the field, meeting the requirements for a whole day of outdoor inspection tasks. The human-computer interaction interface of the device is simple and clear, with simple operation logic. After a brief training, operation and maintenance personnel can get started and operate it, reducing the threshold for device use.

At present, the photovoltaic industry has shifted from high-speed construction to a new stage of improving quality and efficiency. The attenuation of module power and inconsistent string performance are important factors affecting the actual power generation of power plants. As a core tool for evaluating the power generation performance of modules, the IV tester is indispensable in the aspects of arrival sampling, completion acceptance, annual operation and maintenance, and fault location. The LAILX LX-PV31 portable IV tester integrates large range, high precision, strong portability, and intelligence, solving industry pain points such as limited range, accuracy drift, and poor outdoor adaptability of traditional equipment. It can be used for component performance calibration in factory laboratories and deeply adapted to various complex power plant sites, providing solid data support for quality control and power generation improvement of photovoltaic projects, and helping domestic photovoltaic power plant operation and maintenance to continuously evolve towards higher efficiency and standardization.

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