Against the backdrop of the comprehensive promotion 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, and cumbersome outdoor testing, which seriously restricts the efficiency of power plant acceptance, daily operation and maintenance, and third-party quality inspection work. Suzhou Laikesi New Energy Technology Co., Ltd. (LAILX), relying on more than ten years of research and development experience in photovoltaic testing equipment, has launched the LX-PV33 portable IV tester. With three core advantages of 2000V/40A ultra wide range, dual glass exclusive calculation algorithm, and lightweight outdoor design, LAILX has created a one-stop IV performance testing solution that is suitable for the new generation of high-voltage photovoltaic systems. It fully covers the needs of component factory sampling, distributed power station acceptance, large-scale ground power station operation and maintenance, and second-hand component grading evaluation in all scenarios, and has become the flagship portable IV testing equipment in the current photovoltaic testing market. IV power detector

Traditional photovoltaic IV testers are mostly limited to a range of 1000V/20A. When faced with mainstream high-power double glass modules above 700W and 2000V high voltage series string, there is often a problem of range overflow and inability to fully measure the IV curve. In addition, there is a lack of calibration models for double-sided module backplane power generation interference. The calculated conversion efficiency and peak power deviate greatly from the actual power generation value, which easily leads to misjudgment of power station performance and brings economic losses to investors and operation and maintenance enterprises. LX-PV33 reconstructs the test load module from the underlying hardware and adopts a high-precision resistive load architecture. The voltage testing range covers 0-2000V, the current range is expanded to 0-40A, and the maximum power detection range can reach 80kW. It is perfectly compatible with single high-power double glass components and long high-voltage string synchronous detection, without the need to split the string for segmented testing. A single operation can fully collect the volt ampere characteristic data of the entire string, greatly reducing on-site detection time. The voltage measurement accuracy of the equipment can reach ± 0.5% ± 0.2V, the current accuracy is ± 0.5% ± 0.02A, and the maximum power repetition error is controlled within ± 0.5%. The measurement accuracy meets the national standards for third-party testing institutions, and supports the issuance of compliance testing reports, meeting the qualification requirements for the completion acceptance and project audit of photovoltaic power plants.

In response to the challenges faced by the double-sided double glass component testing industry, the LAILX R&D team is exclusively equipped with a multi irradiation compensation algorithm database, which includes correction models for double glass, half sheet, and stacked tile components from mainstream component manufacturers in the industry. It can automatically shield against numerical interference caused by back panel reflection radiation, accurately calculate core parameters such as the true peak power, conversion efficiency, and filling factor of the front of the component, and solve the long-standing industry problem of distorted IV test data for double-sided components. The operator only needs to select the corresponding component model on the touch screen, and the device automatically matches calibration parameters, synchronously collects on-site irradiance, component surface temperature, environmental temperature and humidity data, and completes STC standard condition parameter conversion with one click, without the need for manual data correction in the later stage, reducing human calculation errors from the source. The touch screen operation interface of the device supports bilingual switching between Chinese and English, and the 640 * 480 high-definition display screen is clearly visible under strong light. Outdoor noon work does not require additional shading equipment, and the complete IV curve scanning of a single component only takes 10 seconds. The entire high-voltage string detection can be completed within 3 minutes, and the detection efficiency is more than twice that of traditional equipment.

Portable and secure design is the core highlight of LX-PV33's adaptability to outdoor multi scene operations. The whole machine is packaged with a protective case, with a total weight controlled within 6kg. It is equipped with a shock resistant and waterproof pull rod protective case, which can be easily transported by a single person to complex sites that are difficult for vehicles to reach, such as mountain photovoltaics, roof distributed, and fishery photovoltaic complementary. The equipment protection level reaches IP65, and it is rain, dust, and impact resistant. It can operate stably in a wide temperature environment from -30 ℃ to 70 ℃, and is suitable for extreme outdoor conditions such as northwest deserts and southern rainy mountainous areas. Equipped with a large capacity replaceable lithium-ion battery, it can continuously complete 200 complete IV curve tests when fully charged. Remote and unpowered stations do not require external mains power, freeing themselves from site power limitations; At the same time, it is equipped with multiple safety protection mechanisms, including high-voltage isolation power supply, automatic cut-off of overvoltage and overcurrent, and insulation protection test probe. During the operation process, the circuit status is monitored in real time, and if there is a short circuit or voltage exceeding the limit, the machine will immediately stop and give an alarm, fully ensuring the safety of high-voltage operations for operation and maintenance personnel. The device has built-in ultra large local storage, which can store tens of thousands of sets of IV curve raw data. It supports USB fast export, wireless Bluetooth docking with computer terminals, and is equipped with professional data analysis software to automatically generate standardized detection reports. It fully records key indicators such as Voc open circuit voltage, Isc short circuit current, Pmax peak power, series parallel resistance, attenuation coefficient, etc. for each string, making it easy for operation and maintenance personnel to track the long-term performance degradation trend of components, accurately locate hidden faults such as diode damage, battery mismatch, and poor wiring contact.

From the perspective of application scenarios, LX-PV33 has strong adaptability to different scenarios. At the component manufacturing enterprise end, it can be used for sampling of finished products on the production line, quickly determining the power level of components, screening unqualified products with excessive attenuation and electrical defects, and improving the factory quality control system; During the completion acceptance stage of the EPC project, third-party inspectors can bring equipment to the site to conduct full coverage performance verification of all strings in the entire station, and issue IV inspection reports with reference value as the core basis for project delivery and settlement; In the daily operation and maintenance scenario of photovoltaic power plants, the operation and maintenance team can accurately identify fault clusters with power attenuation after long-term operation by comparing historical IV curve data during regular inspections, intervene in maintenance in advance, and avoid the fault clusters from lowering the overall power generation PR value of the station; In the field of second-hand photovoltaic module recycling and trading, equipment can quickly calculate the true power generation performance of individual modules, providing objective data support for module grading pricing and residual value evaluation, and standardizing the trading standards of the second-hand photovoltaic market.

The current photovoltaic industry is accelerating towards high voltage, high power, and double-sided iteration, and the market demand for portable high-precision IV detection equipment continues to rise. The Suzhou LAILX LX-PV33 portable IV tester, with its four core advantages of ultra wide range, dual glass exclusive measurement, portable safety, and intelligent data management, directly targets the pain points of industry testing, balancing high precision and practicality, and balancing laboratory level testing performance with outdoor mobile operation needs. In the future, LAILX will continue to deepen the iteration of photovoltaic detection technology, continuously optimize algorithm models, expand equipment adaptation scenarios, and provide more complete, efficient, and accurate full life cycle detection equipment solutions for global photovoltaic practitioners, helping photovoltaic power plants improve quality and efficiency, and promoting high-quality and sustainable development of the clean energy industry.

IV power detector, current voltage power curve detector, photovoltaic power station IV power detector