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 insufficient range, large accuracy deviation, and weak outdoor adaptability of traditional detection equipment are becoming increasingly prominent. The market urgently needs portable IV detection equipment 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 an integrated on-site volt ampere characteristic testing solution 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. Current voltage power curve detector

The core of evaluating the power generation performance of photovoltaic power plants lies in IV curve testing. By collecting voltage and current data of components and strings, a complete volt ampere characteristic curve is drawn to accurately locate hidden dangers such as power attenuation, string mismatch, occlusion, and hot spots that affect power generation. In the past, many on-site testing equipment had problems such as bulky size, complex operation, unclear screen under strong light, and cumbersome data conversion. When conducting outdoor on-site testing, multiple sets of equipment such as radiation meters and temperature sensors need to be carried, and data needs to be manually converted later, which is inefficient and prone to introducing human errors, and cannot meet the needs of large-scale on-site sampling and grid connection acceptance. Especially after the popularization of new high-power components such as TOPCon and HJT, the upper limit of the range of traditional equipment is insufficient, making it difficult to adapt to the testing needs of high current string, which restricts the progress of on-site testing work.

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 types of components such as monocrystalline, polycrystalline, double glass, half chip, and N-type, and can cover both single component incoming inspection and whole string performance diagnosis. The device is equipped with a high-precision irradiance sensor and component temperature acquisition module, which collects on-site irradiance and backplate temperature data. It also has an automatic conversion algorithm for standard testing conditions, which can convert the measured data to STC standard operating conditions with just one click. It directly outputs a complete set of key parameters such as maximum power, open circuit voltage, short-circuit current, and fill factor, and automatically draws a complete IV curve without the need for manual secondary calculations, greatly reducing the workload of on-site testing. The whole machine inspection speed is fast, and single string inspection only takes 10 seconds. When facing the batch inspection task of megawatt level power plants, it can significantly shorten the construction period.

In terms of hardware structure, LX-PV31 adopts an integrated waterproof protective box design, which is lightweight and can be carried and transported by a single person. It is very suitable for on-site operations in power stations with inconvenient transportation such as distributed roofs, mountains, and water surfaces. Equipped with an outdoor high brightness touch display screen, the image is clear and readable under strong light. It is equipped with a dual operation interface in Chinese and English, reducing the threshold for operators to get started. New employees can independently complete on-site testing after a brief training. The device has a built-in large capacity local storage that can store tens of thousands of test records, supports wireless WiFi transmission, and data can be directly synchronized to a computer or tablet. It is equipped with LAILX's self-developed IV analysis software, which automatically generates inspection reports that meet industry acceptance standards. The reports can be exported as PDF archives to meet the data retention requirements of power plant acceptance, asset evaluation, insurance loss assessment, and other scenarios. In terms of electrical safety, LX-PV31 is equipped with multiple overvoltage, overcurrent, and anti reverse protection circuits, which effectively resist outdoor high-voltage impacts and operate stably in harsh outdoor conditions such as dust, humidity, high and low temperatures, ensuring the personal safety of testing personnel and the stability of the equipment itself.

The current photovoltaic industry has shifted from large-scale new construction to a stage that emphasizes both new construction and existing operation and maintenance. A large number of existing power stations that have been in operation for many years have problems such as component degradation year by year and inconsistent string performance. Power station owners need to regularly conduct IV performance surveys, evaluate asset values, and develop operation and maintenance plans. LX-PV31 is widely used in photovoltaic module factory sampling, power station grid connection acceptance, annual operation and maintenance testing, fault string troubleshooting, power station asset evaluation and other scenarios. It has been implemented in a large number of industrial and commercial distributed, ground centralized, and fishery photovoltaic complementary projects in China, and has been recognized by third-party testing institutions, EPC enterprises, and operation and maintenance service providers.

Shanghai LAILX has a complete software and hardware research and development and production system, with a professional technical service team that can provide customers with integrated services such as on-site equipment debugging, operation training, annual calibration, and after-sales maintenance. After the delivery of the equipment, technicians can provide on-site guidance for practical operations, answer functional questions for customer project scenarios, and quickly respond to after-sales needs nationwide. The LX-PV31 portable IV tester, with its comprehensive advantages of lightweight, high precision, and full field adaptability, provides a reliable domestic equipment solution for on-site performance testing of photovoltaics. It continues to assist in the fine operation and maintenance of photovoltaic power stations, tap into the potential of existing power stations, and promote the high-quality and sustainable development of the photovoltaic industry.

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