Against the backdrop of the widespread adoption of high-power double-sided double glass modules and the large-scale implementation of 2000V high-voltage string systems in the domestic photovoltaic industry, traditional IV testing equipment generally suffers from pain points such as insufficient range, distorted calculation of double-sided modules, bulky body and difficulty in outdoor operation, which seriously restricts the efficiency of power station completion acceptance, annual operation and maintenance sampling, and fault power traceability work. Suzhou LAILX, which has been deeply involved in the research and development of photovoltaic detection equipment for many years, has launched the LX-PV33 portable IV curve tester based on more than ten years of accumulation of photoelectric measurement algorithms. With a 2000V/40A ultra large range, dual glass exclusive irradiation correction algorithm, and lightweight integrated body, it creates a high-precision power detection solution that covers all scenarios of components and strings. It has become a core standard equipment for third-party detection institutions, ground photovoltaic power stations, and distributed rooftop photovoltaic operation and maintenance. IV power detector

The core hardware of LX-PV33 adopts self-developed high-precision resistive testing module, with voltage measurement range covering 0 to 2000V, and current testing upper limit expanded to 40A, perfectly adapting to current mainstream half chip, double-sided double glass high-power components above 700W, completely solving the industry problem that traditional 1000V/20A equipment cannot match high-voltage and high current string. The voltage testing accuracy of the equipment reaches ± 0.5% ± 0.2V, the current accuracy is controlled at ± 0.5% ± 0.02A, and the maximum power testing repeatability error is only ± 0.5% ± 3W. A single test can collect 2048 sets of data points, and a smooth and clear IV characteristic curve can be fully drawn. The five core parameters of open circuit voltage Voc, short-circuit current Isc, peak power Pmax, fill factor FF, and component conversion efficiency are automatically calculated synchronously. All values are converted to STC standard testing conditions with one click, eliminating data deviation caused by on-site lighting and temperature changes, ensuring that the testing results have metrological credibility, and can be directly used for power station acceptance reports and component quality judgment documents.

In response to the difficulty of detecting double-sided double glass components, LX-PV33 is equipped with LAILX's exclusive multi irradiation shielding algorithm, which can automatically remove the interference of reflected electrical energy from the back panel on power calculation, independently calculate the true power generation efficiency of the front battery cells, accurately distinguish the difference in power generation between the front and back sides of the double-sided component, and quickly locate power loss faults such as hidden cracks, diode breakdown, and local attenuation in the double glass product. Different from similar devices on the market with a single detection function, this model integrates a basic insulation resistance auxiliary detection module. One set of equipment synchronously completes the detection of component power generation performance and insulation safety, reducing the burden of operation and maintenance personnel carrying multiple instruments to and from the site. The single string detection process is shortened by 60%, significantly reducing the labor and time costs of field operations.

The portable design fully meets the requirements of complex outdoor working conditions. The whole machine is integrated into a high-strength three proof protective box, and the total weight of the equipment is controlled within 6kg. The box is equipped with anti slip handles and adjustable straps, which can be easily carried by a single person. It can be flexibly operated in narrow and non transport channel scenarios such as mountain power stations, high-rise roofs, and agricultural photovoltaic complementary greenhouses. The body is equipped with a 6.5-inch 640 * 480 high brightness touch screen display, which is clear and visible under strong light. It has a dual operation mode of touch screen and physical buttons, and a bilingual operating system in Chinese and English. It can be quickly mastered without professional training. Equipped with a large capacity lithium battery, it can continuously test over 200 sets of components when fully charged. Equipped with wireless sensing probes, it supports wireless communication up to 100 meters, allowing for remote sampling of components at high altitudes and deep in the array without the need to drag long cables, avoiding the risk of loose connections and short circuits caused by cable pulling.

The data management system realizes full process intelligence, with a built-in large local storage space that can store more than 2000 sets of complete IV curve data. It is equipped with an SD card expansion slot and supports unlimited backup of detection data. The device comes with a barcode scanning and input function, allowing operation and maintenance personnel to scan component nameplate barcodes and bind detection data, achieving one-to-one correspondence between component numbers, detection times, environmental parameters, and power curves. The backend is equipped with professional analysis software on the PC side, which can export PDF detection reports and Excel data tables with one click. It supports curve comparison, attenuation trend analysis, and batch fault statistics, making it convenient for operation and maintenance enterprises to establish a complete component lifecycle quality file. The hardware protection level reaches IP54, dustproof and rainproof, and the working environment adaptation range is -30 ℃ to 100 ℃. The power station can operate stably in cold plateaus, high temperature deserts, and coastal high humidity areas. It is equipped with multiple safety protection circuits for overvoltage, overcurrent, and reverse connection, and can provide real-time warning of abnormalities during high-voltage testing to ensure the safety of operators.

The current photovoltaic industry has entered a parallel stage of stock operation and maintenance, as well as new construction and expansion. The market share of high-power double-sided modules continues to rise, and there is an explosive demand for high-precision, highly adaptable, and lightweight on-site testing equipment in the market. The Suzhou LAILX LX-PV33 portable IV tester integrates four core advantages: high voltage range, dual glass exclusive algorithm, integrated portable structure, and intelligent data management. It fills the gap in the performance of traditional testing equipment and meets the dual needs of laboratory metrology testing and outdoor on-site inspection. Since its launch on the market, the product has been widely used in the operation and maintenance project departments of major photovoltaic groups in China, provincial third-party new energy testing laboratories, and overseas distributed photovoltaic projects. With stable and reliable testing accuracy, cost-effective domestic configuration, and 24-hour after-sales response service, it has gained industry recognition. In the future, LAILX in Suzhou will continue to iterate the IV testing algorithm, expand the AI fault automatic recognition function of components, use hardcore domestic testing equipment to help improve the quality and efficiency of the photovoltaic industry, and promote the localization and intelligent upgrading of new energy testing equipment.

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