Against the backdrop of the accelerated implementation of China's new power system and the comprehensive entry of the photovoltaic industry into the era of high voltage and high power, centralized mountain power stations, industrial and commercial distributed photovoltaics, household rooftop photovoltaics, module factory quality inspection, third-party acceptance testing and other scenarios have put forward new requirements for outdoor portable IV detection equipment, such as wider range, faster speed measurement, higher accuracy, and lighter portability. Traditional old-fashioned IV testers commonly suffer from various pain points such as insufficient voltage range, unstable testing in low light environments, bulky equipment that is difficult for a single person to operate, inability to automatically convert data to STC standard parameters, and low safety protection levels, which have long constrained the efficiency and data credibility of photovoltaic field testing. Based on more than ten years of research and development experience in photovoltaic testing instruments, LAILX in Suzhou has launched the LX-PV33 portable IV tester. With four core technologies of self-developed high-voltage load module, millisecond level synchronous acquisition algorithm, integrated portable body, and full condition safety protection, LAILX provides one-stop solutions to the outdoor performance testing problems of photovoltaic modules and strings, becoming a benchmark portable testing equipment in the fields of photovoltaic operation and maintenance, engineering acceptance, and module research and development. Current voltage power curve detector

The LX-PV33 achieves comprehensive upgrades in core hardware performance, perfectly adapting to mainstream high-voltage photovoltaic strings of 1000V and 1500V on the market. The voltage testing range covers 0-1500V, and the current detection range is 0-30A. It can fully match various new high-power components and long string arrays such as TOPCon, HJT, heterojunction, double-sided double glass, etc., completely avoiding the industry problem of insufficient range for old equipment to detect new power stations. The equipment is equipped with a dual channel synchronous acquisition sensor developed by Lexus, with a voltage measurement accuracy of ± 0.2% FS, a current accuracy of ± 0.3% FS, and a sampling rate of milliseconds. A single complete measurement of IV and PV hyperbolas only takes 3-5 seconds, which is more than ten times more efficient than traditional equipment's detection speed of more than one minute. For outdoor low light work scenarios such as cloudy days, early morning, and evening, the LX-PV33 is equipped with an intelligent irradiation compensation algorithm and a high-precision irradiation and temperature dual acquisition probe. It can synchronously collect environmental irradiance and component backplane temperature in real time, automatically convert key parameters such as on-site measured power, open circuit voltage, short-circuit current, and maximum power point to the industry's unified STC standard testing conditions, and issue standardized testing reports that can be directly used for grid connection acceptance, third-party organization notarization, and power station generation evaluation. The data authority fully meets the requirements of domestic energy industry testing standards.

Portability and all-weather operation design are the core advantages that distinguish LX-PV33 from similar products. The whole machine adopts a modular integrated structure, eliminating redundant and bulky components. The main unit is equipped with a protective trolley box with a total weight of less than 7.2kg. The roller box supports single person dragging and transportation, and can be easily set up in narrow spaces on roofs, rugged mountainous areas, and floating photovoltaic platforms without air transportation restrictions, greatly reducing the labor cost of cross regional flow detection. The body shell is made of industrial grade three proof material, meeting IP64 dust and waterproof standards, which can resist outdoor dust, light rain, and high and low temperature environmental interference. It can operate stably in a wide temperature range of -20 ℃ to 60 ℃, and has no degradation in long-term performance in harsh photovoltaic fields such as deserts and coastal high salt fog. The power supply scheme adopts a built-in large capacity safe lithium battery, which can continuously complete 400 sets of uninterrupted detection when fully charged. Remote photovoltaic bases without mains power coverage can be inspected all day without external power supply. At the same time, it is equipped with a fast charging interface, which can be fully charged in two hours to ensure continuous operation requirements. The device operation interface is equipped with a 7-inch high-definition touch screen, a fully Chinese visual operation menu, and does not require professional technical personnel training. Zero basic operation and maintenance personnel can proficiently master all detection processes in half an hour. It supports one click start curve scanning, real-time waveform playback, and fault parameter marking. The built-in AI intelligent analysis system can automatically identify performance abnormalities such as component attenuation, bypass diode failure, and string mismatch, synchronously mark fault points, and greatly shorten the manual fault investigation cycle.

In terms of safety performance, LX-PV33 is equipped with multiple high-voltage protection mechanisms, with built-in four fold protection circuits for overvoltage, overcurrent, reverse connection, and leakage. After testing is completed, the residual high voltage in the circuit is automatically released to eliminate the safety hazards of electric shock during outdoor high-voltage testing; The wiring terminals are equipped with insulation protective sheaths to prevent accidental short circuits and fully comply with the safety regulations for high-voltage operations on photovoltaic sites. The data management function fully adapts to the needs of digital operation and maintenance. The device can store 100000 complete detection curves and parameters locally, support USB and Bluetooth wireless dual-mode data export, and is equipped with professional analysis software on the PC side to generate PDF detection reports in batches. It automatically archives project names, detection times, site numbers, component models and other traceability information, supports docking with photovoltaic operation and maintenance cloud platforms, realizes cloud synchronization and long-term traceability of power station detection data, and provides complete data support for power station life cycle performance evaluation, annual power generation loss calculation, component quality assurance and rights protection.

At present, the LX-PV33 portable IV tester has been widely used in hundreds of centralized photovoltaic power stations, dozens of third-party new energy testing institutions, and multiple leading photovoltaic module production enterprises in China. The actual test data of the mountain photovoltaic operation and maintenance project shows that after adopting LX-PV33, the original 8-person 15 day whole station string detection work can be completed in just 3 days by 4 operation and maintenance personnel. The accuracy of component performance fault location has been improved to over 97%, and a large number of power attenuation hidden dangers can be identified in advance every year, reducing millions of kilowatt hours of power generation loss. The equipment procurement cost can be recovered in the short term through the increase of power generation revenue. In the scenario of distributed photovoltaic grid connection acceptance, energy regulatory agencies in various regions recognize the standardized testing data issued by it, greatly shortening the project acceptance cycle and reducing the labor and time costs of third-party testing.

As a local instrument brand deeply involved in the photovoltaic testing field, Suzhou LAILX has always focused on solving practical pain points in the industry as its research and development core. The landing of LX-PV33 portable IV tester fills the gap in the high-voltage outdoor high-precision portable testing equipment market, balancing testing accuracy, operational efficiency, portability, and safety compliance. In the future, Lexus will continue to iterate algorithms and hardware, optimize detection solutions for 2000V ultra-high voltage new string and perovskite new photovoltaic modules, and continue to provide cost-effective domestic precision detection equipment for refined operation and maintenance of photovoltaic power plants and high-quality development of the new energy industry, helping domestic photovoltaic detection instruments achieve independent controllability and technological leadership.

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