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The World’s Leading Supplier of Solar PV Solutions - LONGi Solutions Utility-Scale Solar Power Plants Decarbonization Eco-friendly PV Power Plants Solar-plus-Energy Storage Plants Hybrid Power Plants Commercial & Industrial Green Businesses Industrial Construction Transportation Agri-voltaics Ecological Restoration Residential Building Beautiful Neighborhoods Standard Residential Custom Residential Products Silicon Wafers Technology, Manufacturing and Quality Assurance Tairay P Type N Type PV Modules Cutting-Edge Module Technology Hi-MO X10 Hi-MO 9 Hi-MO 7 Hi-MO X6 Max Hi-MO X6 Hi-MO 5m Hi-MO 5 BIPV Building Solutions LONGi Roof LONGi Bright Hydrogen LONGi Green Hydrogen Solution ALK Hi1 ALK G Technology Innovation LONGi Technology Innovation Innovation Center Collaborative Innovation Insights LONGi Industrial insights Global Green Updates Industry Dynamics Activity Customers' Exchange LONGi Lives Exhibitions Special Event Newsroom Latest News LONGi News LONGi Notices Silicon Wafer Price LONGi Feature Report Service Downloads FAQs Cases Module Authenticity Service Consultation Distribution Network Cargo Tracking Traceability Service Sustainability Sustainability Our Commitments LIGHT SBTi ESG Ratings Sustainability Report Sustainability Report Climate Action Policy & Certificate LONGi Sustainability Management Environmental Society Governance Our Actions LONGi Supply Chain Green Partner Empowerment Program Zero Carbon Life Plan for Pandas Biodiversity Conservation Responses to Climate Change Supply Chain Supply Chain Management System Sustainable Procurement Responsible Mineral Management Supplier Collaboration and Empowerment Advancing Climate Action and Biodiversity Conservation with Photovoltaics English 2024 Sustainability Report Chinese English 2023 Climate Action Chinese English About LONGi About LONGi Continuing to focus on mono-crystalline technology About LONGi Corporate Culture Milestones Globalization Leadership Investors Compliance LONGi Careers Collaborative Employee-Focused Workplace Work at LONGi Jobs Contact LONGi We want to hear from you! Contact Us Supplier/Recycler Global English Select region/language Global English Asia Pacific China 简体中文繁體中文 Korea 한국어 Australia English India English Vietnam Tiếng Việt Japan 日本語 Thailand ภาษาไทยEurope English Germany Deutsch France Français Italy Italiano Netherlands Dutch Spain EspañolLatin America Latin America Español Brazil PortugueseMiddle East and Africa United Arab Emirates لغة عربيةNorth America United States English Home Back Contact(BC) Solar Technology Development White Paper At the key node of intergenerational transition of global Photovoltaic (PV) technology, the back contact (BC) cell technology is leading the new-generation PV technology paradigm revolution, becoming the core engine to drive industry cost reductionand efficiency improvement and realize energy transition. Learn More Global Optimal Design Competition for BC Solar Power Plants Design institutes/companies/individuals worldwide are invited to submit design proposals for solar power plants using LONGi's Hi-MO 9 modules. Learn More LONGi Jiaxing Production Base World's First Lighthouse Factory in the PV Industry Learn More Hi-MO X10 Peak of Crystalline Silicon First Choice for Value Powered by LONGi HPBC 2.0 Cell Technology, Redefining a New Era of Photovoltaic Value Learn More Hi-MO 9 Efficiency Redefined, Power Amplified Learn More Vertically Integrated Solar PV Value Chain LONGi’s technological and manufacturing leadership in solar wafers, cells and modules underscores our commitment to helping accelerate the clean energy transition. By offering high-quality, reliable products and systems, we provide holistic solutions for the solar and renewables industry. Silicon Wafers A full range of wafer products can meet the requirements of different solar cell technology routes, and high-quality wafers can provide superior performance, that keep us far ahead in the market. Learn More PV Modules Backed by advanced technologies, our modules feature excellent power ratings and top conversion efficiencies, and can be used across all market segments. Our field-proven bifacial modules deliver added performance benefits and long-term reliability. Learn More PV Solutions LONGi is more than a product supplier, offering project consultation, design, installation, procurement, commissioning, operation and maintenance, and financing expertise. Learn More Silicon Wafers A full range of wafer products can meet the requirements of different solar cell technology routes, and high-quality wafers can provide superior performance, that keep us far ahead in the market. Learn More PV Modules Backed by advanced technologies, our modules feature excellent power ratings and top conversion efficiencies, and can be used across all market segments. Our field-proven bifacial modules deliver added performance benefits and long-term reliability. Learn More PV Solutions LONGi is more than a product supplier, offering project consultation, design, installation, procurement, commissioning, operation and maintenance, and financing expertise. Learn More Technology Innovation Innovation Labs Continuously Consolidate the Innovative Achievements of the "Double Champion" Certified by the authoritative Institute for Solar Energy Research Hamelin (ISFH) in Germany, the photoelectric conversion efficiency of LONGi's independently developed hybrid back-contact crystalline silicon solar cell (HIBC) has reached 27.81%, pushing the exploration of the limits of monocrystalline silicon photovoltaic cells to new heights. Certified by the U.S. National Renewable Energy Laboratory (NREL), the conversion efficiency of LONGi's independently developed crystalline silicon-perovskite two-terminal tandem solar cell has reached 34.85%, once again breaking the world record for the efficiency of crystalline silicon-perovskite tandem cells. Learn More LONGi R&D Centers LONGi’s network of R&D centers focuses on solar wafer, cell, module and solutions technologies. Our strategic partnerships strengthen the cooperation among enterprises, universities and research institutes. Learn More LONGi Lifecycle Quality Customer value is at the core of LONGi’s philosophy, and our life-cycle quality approach can be found in every link of product production and application from component design to mass production and after-sales support, to ensure the highest quality, reliability and performance for our customers. Learn More Continuously Consolidate the Innovative Achievements of the "Double Champion" Certified by the authoritative Institute for Solar Energy Research Hamelin (ISFH) in Germany, the photoelectric conversion efficiency of LONGi's independently developed hybrid back-contact crystalline silicon solar cell (HIBC) has reached 27.81%, pushing the exploration of the limits of monocrystalline silicon photovoltaic cells to new heights. Certified by the U.S. National Renewable Energy Laboratory (NREL), the conversion efficiency of LONGi's independently developed crystalline silicon-perovskite two-terminal tandem solar cell has reached 34.85%, once again breaking the world record for the efficiency of crystalline silicon-perovskite tandem cells. Learn More LONGi R&D Centers LONGi’s network of R&D centers focuses on solar wafer, cell, module and solutions technologies. Our strategic partnerships strengthen the cooperation among enterprises, universities and research institutes. Learn More LONGi Lifecycle Quality Customer value is at the core of LONGi’s philosophy, and our life-cycle quality approach can be found in every link of product production and application from component design to mass production and after-sales support, to ensure the highest quality, reliability and performance for our customers. Learn More 3,000 <> Researchers￥50.14 <Billion> 2024 R&D 3,342 <Items> Patents26.81 <%> N-HJT Efficiency LONGi PV Solutions LONGi is a world leader in the clean energy transition. We provide a comprehensive suite of solar PV solutions that can optimize a wide range of project applications. Utility-Scale Solar Renewable Power Plants Learn More Commercial & Industrial Ready for Business Learn More Residential Building Beautiful Neighborhoods Learn More Hydrogen Green Power + Green Hydrogen = Green Earth Learn More Utility-Scale Solar Commercial & Industrial Residential Hydrogen Trending News LONGi’s Hi-MO 9 Module Earns CGC Carbon Footprint Certification LONGi’s Hi-MO 9 module, powered by its advanced HPBC2.0 technology, has recently been awarded the Product Carbon Footprint Label Certification by the China General Certification Center (CGC). Case Study 2025.8.28 From Understanding to Trust: Sies Bajio Joins Hands with LONGi Hi-MO X10 to Build the Leon Industrial Park PV Project Recently, the Sies Bajio PV project at EXPLORA Ecological Science Park in León, Guanajuato, has been successfully implemented, adding a vivid illustration to this trend. Case Study 2025.8.1 LONGi Maintains AAA Ranking In Q2 2025 PV ModuleTech Bankability Ratings Recently, PV Tech, an authoritative analysis institution in the PV industry, released the Q2 2025 PV ModuleTech Bankability Report for module manufacturers. Global News 2025.8.1 All News All News Environmental, Social and Corporate Governance The LONGi team is committed to providing innovative products and solutions that help make the world a healthier, safer and more sustainable place. We value our role in the global business community and honor our obligation to pursue the highest standards of environmental, social and corporate governance. 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The World’s Leading Supplier of Solar PV Solutions - LONGi
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LONGi, using innovative products and solutions help the world a healthier, safer and more sustainable place.