Against the backdrop of the continuous deepening of the dual carbon strategy and the leapfrog growth of domestic photovoltaic installed capacity, 1500V high-voltage photovoltaic systems and large-sized half cell modules have become the mainstream configurations for ground power stations and industrial and commercial distributed photovoltaics. New standards have been proposed for the range, accuracy, portability, and safety protection capabilities of photovoltaic string volt ampere characteristic detection equipment in the stages of power station completion acceptance, daily operation and maintenance inspections, and third-party quality testing. Traditional IV testers generally have shortcomings such as insufficient voltage range, bulky body, slow detection speed, and poor adaptability to outdoor operations, making it difficult to adapt to complex operating scenarios such as mountain photovoltaics, rooftop distributed systems, and energy storage supporting photovoltaics. Suzhou Laikesi New Energy Technology Co., Ltd. (LAILX), relying on years of research and development experience in photovoltaic testing instruments, has launched the LX-PV31 portable IV tester. With four core advantages of large range, fast scanning, lightweight body, and full field adaptation, it fully covers the performance testing needs of photovoltaic modules and strings, becoming the core equipment for performance testing in the photovoltaic industry. Current voltage power curve detector

The core hardware of LX-PV31 portable IV tester is benchmarked against the industry's cutting-edge technology standards, targeting the pain points of high-voltage photovoltaic system detection. The maximum tested open circuit voltage can reach 1500V, and the short-circuit current is 30A. It can fully adapt to the current mainstream 1500V high-voltage string, covering photovoltaic arrays within 30kW in a single test. It is compatible with large-sized 210 and 182 series high-efficiency components and completely eliminates the limitations of traditional 1000V range equipment that cannot adapt to new photovoltaic systems. The equipment is equipped with a self-developed high-precision high-speed sampling chip, paired with a wide linear electronic load, to achieve 10 second high-speed complete IV and PV curve scanning. It synchronously collects more than ten core parameters such as open circuit voltage, short-circuit current, peak power, fill factor, conversion efficiency, component temperature, real-time irradiance, etc. It has a built-in STC standard conversion model, which does not require manual secondary calculation. It directly outputs the nominal performance data of components under standard operating conditions on site, greatly reducing the workload of testing personnel in data processing.

The portable integrated body design is a key highlight of LX-PV31's adaptability to outdoor mobile operations. The whole machine is packaged in an integrated manner, with a weight of less than 6kg without accessories, and is equipped with a wear-resistant and shockproof aviation protective box. It can be easily carried and transported by a single person, and can be easily carried and operated in complex areas with inconvenient transportation such as mountains, rooftops, and floating photovoltaics in fish ponds. The body is equipped with a 7-inch outdoor high brightness capacitive touch screen, which provides clear and visible images in strong light environments. At the same time, physical function buttons are added, and stable operation can be achieved by wearing insulated protective gloves. There are no restrictions on outdoor operations in rainy, snowy, or dusty environments. The device is equipped with a large capacity and long endurance lithium battery, which can continuously detect for more than 9 hours when fully charged. It is also equipped with a Type-C fast charging interface, making emergency power replenishment convenient on site; The body is equipped with dual channels for USB data export and wireless data transmission, and the detection data is automatically stored locally. It supports offline retention of tens of thousands of detection records and can export Excel standard detection reports with one click. It is suitable for third-party detection agencies to archive and power station operation and maintenance ledger management needs.

In terms of building a safety protection system, LX-PV31 is equipped with multiple intelligent protection mechanisms, built-in high-voltage isolation module, and four automatic protection programs including overvoltage, overcurrent, overtemperature, and reverse connection. Once wiring errors, string voltage exceeding the range, load abnormalities, and other situations are detected, the device will instantly cut off the output and pop up a window to indicate the fault type, thus preventing high-voltage electric shock and instrument burnout safety accidents from the hardware level. Equipped with professional insulation testing fixtures and extendable temperature acquisition probes, the insulation level of the fixtures meets the 1500V DC high voltage operation standard, and is compatible with photovoltaic modules of different frame sizes. The probes can be tightly attached to the back panel of the module to accurately collect the working temperature, ensuring the authenticity and effectiveness of environmental compensation parameters. The working temperature range of the equipment covers -20 ℃ to 60 ℃, and it can operate stably in high and low temperatures, high humidity, and dusty outdoor environments. The protection level meets the industrial IP54 standard and is suitable for outdoor testing operations in various regions of the country throughout the year.

In practical industry application scenarios, the LX-PV31 portable IV tester covers the entire lifecycle testing needs of the photovoltaic industry. During the factory quality inspection of components, batch sampling of component volt ampere characteristics can be conducted to screen for products with power attenuation and internal defects; During the completion and acceptance stage of power station construction, the actual power generation performance of the string is tested group by group, and problems such as construction wiring errors, component mixing, and obstruction attenuation are investigated; In daily operation and maintenance inspections, quickly locate inefficient fault clusters, accurately distinguish power losses caused by component aging, shadow occlusion, and PID attenuation, and provide quantitative data support for the development of operation and maintenance plans; Simultaneously adapting to segmented scenarios such as photovoltaic research laboratories, energy storage supporting photovoltaic systems, and household distributed photovoltaic acceptance. At present, this device has been widely used in major photovoltaic power station operation and maintenance enterprises, third-party new energy testing laboratories, and photovoltaic module manufacturers in China, and has gained unanimous recognition from industry users.

Suzhou LAILX always adheres to independent technological innovation. All core chips and algorithm programs of LX-PV31 portable IV tester are independently developed by the enterprise, supporting remote firmware upgrades in the future and synchronously adapting to the industry's new generation of ultra-high power component testing standards. Equipped with dedicated PC data analysis software, it supports deep functions such as IV curve comparison, batch analysis of fault data, and annual power generation attenuation statistics, achieving visual management of detection data. As the photovoltaic industry continues to develop towards high voltage, high power, and refined operation and maintenance, LAILX will continue to optimize the performance of detection instruments, using high-precision, portable, and safe detection equipment to help improve the quality and efficiency of photovoltaic power plants, provide hardcore detection technology support for the high-quality development of the domestic clean energy industry, and help steadily achieve the dual carbon goal.

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