--- title: LONGi Unveils Dual Breakthroughs at SNEC 2025 — Shattering PV Efficiency Records - Nastech Solar | Home of Clean Energy description: LONGi sets new solar efficiency records at SNEC 2025 with a 33% tandem cell and over 26% back-contact module, marking a major leap in photovoltaic technology and the future of clean energy. image: https://blog.nastechsolar.com/hubfs/Imported_Blog_Media/4-Jun-21-2025-04-11-32-6079-PM.png --- [Skip to content](https://blog.nastechsolar.com/en/blog/-longi-unveils-dual-breakthroughs-at-snec2025-shattering-pv-efficiency-records#main-content) [![Home of Clean Energy](https://blog.nastechsolar.com/hs-fs/hubfs/Nastech%20logo-1.png?width=410&height=139&name=Nastech%20logo-1.png)](https://nastechsolar.com) - [Contact Us](https://blog.nastechsolar.com/contact-us) - [News](https://blog.nastechsolar.com/en) Open main navigation Close main navigation - [Contact Us](https://blog.nastechsolar.com/contact-us) - [News](https://blog.nastechsolar.com/en) - [Go Back to > Nastechsolar](https://nastechsolar.com) [Go Back to > Nastechsolar](https://nastechsolar.com) [All posts](https://blog.nastechsolar.com/en/all) June 21, 2025 # LONGi Unveils Dual Breakthroughs at SNEC 2025 — Shattering PV Efficiency Records By  [Nastech Solar | Home of Clean Energy](https://blog.nastechsolar.com/en/author/nastech-solar-home-of-clean-energy)  ·  1 minute read Posted by Nastech on 20th Jun 2025 # [LONGi Unveils Dual Breakthroughs at SNEC 2025 — Shattering PV Efficiency Records](https://nastechsolar.com/blog/-longi-unveils-dual-breakthroughs-at-snec2025-shattering-pv-efficiency-records/) At the recent SNEC 2025 solar expo held June 11–13 in Shanghai, solar powerhouse **LONGi** made waves with not one, but two groundbreaking efficiency milestones—both setting new global records and being promptly included in the 66th edition of the authoritative Solar Cell Efficiency Tables ![](https://blog.nastechsolar.com/hubfs/Imported_Blog_Media/image-12.png) ### 1. ✅ 33 % Efficiency on Large-Area Silicon‑Perovskite Tandem Cells - A 260.9 cm² crystalline silicon–perovskite two-terminal tandem cell reached a certified **33 % conversion efficiency**—a world-first for large-area tandem cells  - This represents a ~20 % jump from conventional single‑junction silicon cells, marking a major step toward reducing PV energy costs . --- ### 2. ⚡ Over 26 % Efficiency in Back‑Contact Crystalline Silicon Modules - LONGi’s back‑contact (BC) module efficiency surpassed **26 %**, edging closer to the ceiling of crystalline silicon technology - These BC modules, including the new Hybrid Interdigitated BC (HIBC) design, draw on innovations certified at 27.81 % cell efficiency—confirmed by Germany’s ISFH in April 2025—reinforcing the tech's commercial trajectory  --- ###  Innovation + Collaboration: LONGi’s Twin-Engine Strategy Celebrating its 25th anniversary, LONGi is doubling down on “Innovation + Collaboration.” CTO **Li Zhenguo** highlighted the company’s commitment to exploring multiple tech pathways—from next-gen tandem stacks to BC and hydrogen research—through an open R&D ecosystem with global partners  > “The era of photovoltaics as a dominant energy source has arrived, yet challenges like energy storage and grid integration remain. Only through collaborative innovation can clean energy truly benefit everyone. --- ###  Why This Matters - **Tandem cells at scale**: Achieving 33 % on a large area is a major leap forward, moving tandem technology from lab to rooftop. - **Closing the BC gap**: Hitting over 26 % for modules brings us close to the theoretical limits of crystalline silicon. --- ### What’s Next Expect to see LONGi scale up production of these tandem and BC technologies. As these technologies mature, the solar industry may enter a “25 %+ era” of standardized module efficiency, with cascading impacts across energy, transport, and grid integration. --- **In Summary**: LONGi’s dual breakthroughs at SNEC 2025—a 33 % tandem cell and >26 % BC modules—are more than record-setting achievements; they mark the beginning of a high-efficiency era in photovoltaics. 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