In the super-large photovoltaic module certification workshop, in the spacecraft panel material testing laboratory, and on the 100-square-meter-level research pilot platform, "insufficient surface area, unmet accuracy standards, and unstable data" were the three major pain points that hindered the development of the industry: Segmented testing by traditional simulators led to data deviations of over 7%, resulting in rejection of certifications; Small light spot stitching irradiation caused an entire panel temperature difference of 8°C, making it impossible to reproduce real working conditions; The uniformity of large-scale experimental platforms' lighting was less than 60%, and the experimental repeatability was poor. After 20 years of deep engagement in the photovoltaic field, Sevan Photovoltaics has broken through with four core technologies and launched the 7IS series of large-area 3A grade LED steady-state solar light simulators. With "super wide surface area + 3A precision + intelligent customization", it offers a comprehensive solution for large-area light testing that is "once covering, precise without deviation", allowing innovation to completely bid farewell to "depending on the weather" and "splicing troubles".
Hardcore performance: 3A standard, redefining large-area light accuracy
As the star product of Sevan Photovoltaics, the core competitiveness of the 7IS series large-area solar light simulator lies in the dual extreme pursuit of "wide surface area" and "high precision". Its 2.4m×4.8m ultra-wide design can once cover super-large photovoltaic modules, entire board vehicle-mounted photovoltaic panels, and other large-sized test objects, completely replacing the traditional segmented testing mode - reducing the test time from 48 hours to 12 hours, increasing efficiency by 4 times, and directly reducing the cost of certification for each module by 60%. What's more commendable is that the equipment fully meets the IEC 60904-9:2020 version A+A+A + standard: spectral matching degree reaches 0.875-1.125 (A + level), continuous coverage of the 350-1100nm full wavelength band, energy restoration accuracy in the near infrared region exceeds 98%; light intensity uniformity is ≤±2.5%, the test temperature difference of the entire panel is controlled within ±1°C, ensuring consistent light in every test area; time stability is low to ±0.05%/8h, and the light intensity drift of the equipment during 1000 hours of continuous testing is ≤±0.8%, data deviation is strictly locked within 1% to make research and production conclusions more persuasive.
The technical support behind it can be regarded as an industry benchmark: the 6th-generation spectral fitting algorithm independently developed, combined with highly consistent LED arrays, enables one-click switching of different standard spectra (AM1.5G/AM0/D65); Constant current drive module keeps the current stability at ±0.01%, avoiding the "pulse fluctuation" and "spectral drift" problems of traditional xenon lamps; Built-in 2m×5m ultra-large size integrating sphere (PTFE coating reflectivity ≥ 99.5%), optimized through 100,000 times optical simulation, realizes "no divergence of large light spots, no distortion at the edges"; Equipped with 1000Hz high-sensitivity light intensity/spectrum dual sensors, combined with AI adaptive calibration algorithm, real-time compensates for voltage fluctuations and environmental temperature changes, ensuring long-term operational accuracy stability. In addition, the LED light source has a lifespan of up to 40,000 hours, calculated based on 8 hours of daily use, requiring no replacement in 3 years, saving 50,000 yuan in annual replacement costs compared to traditional xenon lamp equipment, and the overall power consumption is only 20% of traditional equipment, saving 200,000 yuan in annual electricity costs for a 1GW photovoltaic production line.
Scene empowerment: Unlocking the value of light from production lines to space, in all dimensions
The strength of the 7IS series lies in its deep adaptability to multiple scenarios, seamlessly integrating into both efficient detection in industrial production and precise simulation in cutting-edge research, becoming a core enabling tool.
In the photovoltaic industry, it is the "passing tool" for super-large component certifications. When a leading photovoltaic enterprise was developing a 2.4m×4.8m perovskite/silicon tandem module, due to a deviation of over 7% in the traditional segmented test data, the certification was rejected by a third party, and the product launch was delayed by 3 months. After introducing the Sefan large-area simulator, a comprehensive test covering the entire panel was conducted, and the data fully met the IEC 60904-9 standard. The certification was passed in one go, and the launch cycle was shortened by 3 months. In the production process, an automated testing line composed of 8 devices seamlessly connected to the MES system achieved a testing speed of 60 panels per minute, with an A-grade yield rate increasing from 88% to 94%. The annual loss of defective products was reduced by over 16 million yuan. The equipment supports a continuous adjustable light intensity ranging from 100 to 2000W/m², is suitable for various battery tests such as crystalline silicon, perovskite, and CIGS, and can integrate EL testing and IR testing systems to achieve "one-stop" detection.
In the aerospace field, it serves as the "safety defense line" for extreme environment testing. A team from China's aerospace industry once tested the battery wings of a spacecraft, and due to the light intensity drift of the traditional simulator exceeding 4% at -40℃, the test data could not be used for life expectancy assessment. The Sefan simulator uses a military-grade 6061-T6 aluminum alloy body and an airtight packaging design. Within the extreme temperature range of -40℃ to 60℃, the temperature fluctuation is ≤±0.3℃, and the spectral output deviation is ≤±0.5%. When simulating the AM0 spectrum in space, after 200,000 sets of space spectrum data calibration, the irradiance error is ≤±1%, and the continuous 720-hour low-temperature irradiation test light intensity deviation is ≤±1.2%, helping the team develop an anti-irradiation coating that extends the in-orbit lifespan of the battery wings by 3 times. In the Mars exploration mission, the Sefan simulator completed the "AM0 + infrared enhancement" customization in just 7 days, increasing the irradiance in the 800-1100nm band by 30%, perfectly replicating Martian lighting, and increasing the power generation efficiency of the Mars rover sailboard by 22%.
In the research and pilot production fields, it serves as a "creative platform" for customized exploration. A 150㎡ photocatalysis pilot production platform at an institute of the Chinese Academy of Sciences once had 30 traditional devices that failed to achieve a uniform light intensity of more than 60% and a batch test data deviation exceeding 20%. The custom-made simulator from Sefan adopts a "distributed uniform light design", with each device covering an area of 150㎡, achieving a light uniformity of 96%, and the experimental parallelism increased from 60% to 95%. The equipment supports independent adjustment of 1% accuracy in ultraviolet, visible, and near-infrared bands, and can simulate 8 lighting scenarios such as day-night alternation and seasonal changes. The Qingdao University of Science and Technology team, with its precise control of the light formula, increased the hydrogen production efficiency of photocatalysis by 40%, and the results were published in the top journal "Applied Catalysis B: Environmental".
Brand endorsement: 20 years of accumulation, full-cycle service guarantee
Choosing the Sefan large-area solar light simulator is choosing the technical accumulation and quality assurance of the 20-year leader in the photovoltaic field. As a "specialized and innovative" small and medium-sized enterprise in Beijing and a national high-tech enterprise, Sefan Photovoltaics has obtained ISO9001 quality system certification, holds a number of core patents and software copyrights, has a market share of over 80% in the aerospace field, covers 70% of leading photovoltaic enterprises in the industry, serves over 200 global high-end customers including China's Space Technology Research Institute and China University of Petroleum, and has a core customer repeat purchase rate of 82%. The full-chain service system further eliminates users' worries: The 9 major regional spare parts centers across the country stockpile over 95% of the commonly used components. They offer 7×24-hour technical support, 2-hour emergency response, and 48-hour on-site service. The equipment failure repair cycle is much faster than the industry average. - A photovoltaic enterprise's production line suddenly malfunctioned, and the Sefan engineers arrived at the site in 2 hours and completed the repair in 3 hours, without affecting the production on that day. For personalized needs, Sefan provides "full-dimensional customization" services: the frame size (1m×1m to 3m×6m), spectral type, and installation method can all be customized. Even the structure can be optimized based on the laboratory height and production line layout, and the customization delivery can be completed within 45 days, which is half the cycle shorter than imported equipment and costs 50% lower. Additionally, purchasing the equipment comes with a free initial spectral calibration, one-on-one on-site training by engineers to ensure users master the core operations within one week.
Conclusion: Riding on light, empowering without boundaries.
From the ultra-wide coverage of 2.4m×4.8m to the ultimate stability of ±0.05%; from the efficient certification of photovoltaic production lines to the precise simulation for space exploration, and to the innovative breakthroughs in scientific research, the Sefan 7IS series large-area solar light simulator uses technology to break the size and precision boundaries of light testing and empowers creation of core value in the industry.
In the wave of technological innovation, it is not only a precise instrument but also an "engine" for enterprises to reduce costs and increase efficiency, a "partner" for scientific research breakthroughs, and a "backing" for major national projects. Choosing Sefan and partnering with the 20-year leader in photovoltaics, make each large-area light test precise and efficient, and allow each innovative idea to take root in a controllable light environment - in the world of light testing, unlock the possibilities of no boundaries and achieve greater value.
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