Recently, Suzhou Laikesi New Energy Technology Co., Ltd. (LAILX) officially released the LX-PV31 portable IV tester, a lightweight testing equipment for the entire photovoltaic industry chain. It has completed a comprehensive technical upgrade for the current pain points of 1500V high-voltage photovoltaic string detection. With four core advantages of wide range, fast detection, outdoor high adaptation, and intelligent data management, it has become a standard equipment for component production quality inspection, power station completion acceptance, daily operation and maintenance inspection, and third-party authoritative testing institutions. It provides an integrated solution for the refined performance evaluation of domestic photovoltaic power stations and continues to help improve the quality and efficiency of the new energy industry. IV Curve Tester

With the large-scale expansion of the domestic photovoltaic industry and the widespread adoption of 1500V high-voltage systems, large current half cells, double glass, TOPCon, and HJT new components have been installed on a large scale. Traditional IV testers generally have problems such as insufficient voltage and current range, blurry display under strong outdoor light, slow detection speed, cumbersome data conversion, and wired operation limitations on the scope of operation. In complex scenarios such as mountain photovoltaics, household distributed systems, and commercial rooftop power stations, old-fashioned equipment requires frequent external power supply and multiple sets of auxiliary probes. Single string detection takes tens of seconds and cannot meet the large-scale screening needs of power stations; At the same time, ordinary equipment lacks irradiation and temperature synchronization acquisition functions, making it difficult to quickly convert on-site measured data to STC standard testing conditions. There are significant errors in evaluating the true power generation efficiency of components, which poses difficulties for power plant revenue accounting and fault attenuation determination. Suzhou LAILX has been deeply engaged in the research and development of photovoltaic detection instruments for more than ten years. Relying on independent load circuit algorithms and wireless sensing technology, it has targeted the existing shortcomings in the industry and launched the LX-PV31 portable IV tester, redefining the performance standards of outdoor portable power detection equipment.

The LX-PV31 core hardware performance has achieved a leapfrog improvement, with the device supporting full voltage range testing from 10V to 1500V, and a current range covering 0.01A to 30A. It perfectly adapts to all single component and high and low voltage string detection needs in the current market, completely solving the industry problem that the old 20A range cannot adapt to high current new components. The voltage measurement accuracy can reach 0.1V, the current accuracy is 0.001A, and the overall measurement accuracy is controlled within ± 0.5%. It is equipped with a self-developed high-precision capacitive resistive electronic load, and there is no waveform distortion in the IV and PV curve scanning. It can fully capture more than 20 core performance parameters such as short-circuit current, open circuit voltage, peak power, filling factor, series parallel resistance, conversion efficiency, etc. It can accurately distinguish A-level high-efficiency components, attenuation faulty components, and mismatched strings, providing accurate quantitative data support for component grading and fault tracing. The equipment comes standard with an integrated irradiance probe, component temperature sensor, and environmental temperature acquisition module. During the testing process, the lighting and temperature environmental parameters are synchronously recorded. The built-in standard conversion model automatically converts the on-site measured power to standard testing conditions with just one click, eliminating the need for manual calculation in the later stage and significantly reducing the workload of data processing for testing personnel.

Portability and outdoor compatibility design are the outstanding features of LX-PV31. The whole machine adopts an integrated industrial grade sealed chassis, a lightweight body with a wear-resistant protective shell, and a built-in large capacity long-lasting lithium battery. When fully charged, it can continuously detect for 10 hours without interruption. It can operate all day long in mountain, wilderness, roof and other scenarios without external power supply, without carrying bulky power supply equipment. The device is equipped with a high-definition touch screen that can be viewed under sunlight, with clear and readable curves and values in strong light and rainy environments. It supports dual operation modes of touch screen and physical buttons, and is equipped with a bilingual operation interface in Chinese and English. New employees can operate independently with simple training. Innovatively equipped with wireless sensing transmission technology, the maximum wireless communication distance between the probe and the host can reach 100 meters. Operation and maintenance personnel do not need to drag test cables, and can complete the detection of high altitude, steep slopes, and floating power plant components from a distance, avoiding safety hazards caused by long cable entanglement and wear. Equipped with a patented bracket type probe fixing device, a single person can quickly fix the irradiation and temperature probes on the surface of the component without the need for specialized assistance, greatly reducing the preparation time for single group testing. The complete IV curve scan of a single component only takes 10 seconds, and the efficiency of batch testing of hundreds of components is more than three times higher than traditional equipment.

The intelligent data management function empowers the digital operation and maintenance of power stations. The LX-PV31 local body storage can store more than 2000 complete test waveforms and data. It has a built-in barcode scanning and recognition module, which can input component barcodes before detection, automatically bind the performance curve of each component, and achieve full lifecycle data traceability of components. The device is equipped with multiple types of data export interfaces such as USB and wireless Bluetooth. The detection data and IV curve images can be transmitted to a computer or tablet with just one click. The LAILX exclusive analysis software is used to automatically generate standardized detection reports, which include component basic information, environmental parameters, performance values, curve graphs, and attenuation judgment conclusions. The reports can be directly used for power plant acceptance and archiving, operation and maintenance fault records, and third-party testing to issue qualification documents. The software supports batch data comparison and analysis, visually displaying the performance difference between new and old components, accurately locating strings with severe attenuation, hot spot damage, and power loss caused by poor soldering after long-term operation, providing scientific data basis for the renovation of old power plants and component replacement, and avoiding unnecessary cost losses caused by blindly replacing components.

At the level of multi scenario application in the entire industry, LX-PV31 covers the full process testing needs of the photovoltaic industry. The component production workshop can be used for factory sampling of finished products, quickly screening products with power failure and battery mismatch, and controlling the quality of the products leaving the factory; During the grid connection acceptance stage of the power station, the EPC construction unit completes a comprehensive survey of the overall string power, investigates power attenuation caused by construction wiring errors and component transportation hidden cracks, and ensures that the power station meets the grid connection and power generation standards; Photovoltaic operation and maintenance enterprises can use quarterly and annual routine inspections to continuously track the annual attenuation of components and predict the risk of failures in advance; Third party testing institutions, with their high-precision measurement qualifications, complete authoritative testing work such as power station performance evaluation, dispute detection, and project acceptance. Whether it is a large-scale ground power station in the Gobi Desert, a rugged mountain photovoltaic base, a distributed roof for household use, or a floating photovoltaic and agricultural photovoltaic complementary composite power station on water, LX-PV31 can adapt to stable operations in complex terrain and variable climate environments.

The R&D leader of LAILX in Suzhou stated that the original intention of LX-PV31 development was to fit the real pain points of frontline operation and maintenance personnel, while also considering the three core demands of high precision, low cost, and easy operation, to achieve the localization of high-end IV testing equipment to replace imported products. Compared to imported instruments of the same type, LX-PV31 has a lower price and faster after-sales response speed. The core circuit, sensing algorithm, and supporting software of the whole machine are all independently developed by the enterprise, and there is no technical bottleneck problem. It can continuously iterate and optimize its functions according to the working conditions of domestic photovoltaic power plants. The equipment has completed multiple high and low temperature, waterproof, dustproof and anti-aging tests when it leaves the factory. The protection level meets the outdoor long-term use standard. With after-sales outlets covering the country, the equipment calibration, on-site training, and lifelong software free upgrade services are provided to solve customers' worries about later use.

The current scale of domestic photovoltaic power stations continues to exceed one trillion kilowatts, and refined operation and maintenance to reduce costs and increase efficiency has become the core development direction of the industry. Accurate power detection is the key foundation for improving power generation and extending equipment service life. The Suzhou LAILX LX-PV31 portable IV tester fills the gap in industry testing with comprehensive technological innovation, reconstructs the photovoltaic on-site testing mode with lightweight and portable design, fast detection efficiency, and intelligent data system, and continues to promote the intelligent and domestic upgrading of photovoltaic testing equipment. In the future, Suzhou Laikesi will continue to deeply cultivate the photovoltaic testing track, iterate around five product lines including IV testing, EL imaging, infrared thermal imaging, electrical safety regulations, and meteorological monitoring, and create a one-stop photovoltaic comprehensive testing solution to help China's clean energy industry achieve high-quality and sustainable development.

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