MUNICH, June 24, 2026 /PRNewswire/ -- GCL System Integration Technology Co., Ltd. ("GCL SI" or "the Company") has announced at Intersolar Europe 2026 held from June 23 to 25 in Munich to officially establish back-contact (BC) cell technology as the core strategic pillar of its next-generation photovoltaic roadmap, as a response to the rising demand for high-efficiency, aesthetically driven solutions. It also unveiled the GPC 3.0 full-screen all-black module at one of the most influential solar industry trade fairs worldwide.
As China's solar sector faces mounting efficiency bottlenecks and increasingly diverse end-market demands, the shift to BC technology is driven by both evolving market needs and the company's accumulated expertise in passivation and contact techniques.
"BC is the ultimate architecture for crystalline silicon cells," said GengWeng Huang, Executive Dean of GCL SI's Cell Research Division. "We've already explored TOPCon and HJT extensively, but both are reaching their physical limits. BC is opening a broader window for future efficiency gains."
GCL SI's GPC (Graphical Precise-doping Passivation Contact) product line is its flagship BC technology development. GPC 3.0 targets the premium distributed segment of residential rooftops, C&I rooftops, and BIPV-style applications, where full-screen all-black aesthetics, higher energy yield, and stronger reliability are increasingly valued. GCL SI describes GPC 3.0 as a high-efficiency BC-based module designed to deliver greater real-world rooftop value.
Notably, GCL SI confirmed that the first containers of GPC 3.0 modules are already on their way to Europe, marking the beginning of its commercial rollout in the European distributed solar market.
The GPC residential full-screen all-black modules offer a proven benchmark: 475–500 W output, 23.27%–24.05% efficiency, dimensions of 1,800 × 1,134 × 30 mm, a 30-year linear power warranty with 0.35% annual degradation, and a 30-year product warranty. GCL SI has indicated that GPC 3.0 is designed to further enhance both efficiency and reliability beyond this baseline.
According to GCL SI, GPC 3.0 integrates several upgraded technologies including MAX design, advanced passivation, multi-layer gradient dielectric films, GPC metallization, and FBR granular silicon, to boost module efficiency, durability, and suitability across distributed scenarios. The technology offers four core advantages:
- Enhanced light harvesting & aesthetics: GPC 3.0's MAX‑oriented full‑screen design minimizes front‑side visual interruption while expanding light‑receiving area. Combined with multi‑layer gradient dielectric films, it delivers stronger broadband anti‑reflection and improved energy yield under variable rooftop irradiance.
- Higher conversion efficiency via passivation upgrades: GCL SI's advanced passivation path reduces surface recombination losses and boosts voltage performance. Mass‑produced GPC cells have achieved an average conversion efficiency of 28.38%, underscoring the company's BC‑track efficiency trajectory.
- Lower non‑silicon cost via metallization innovation: GPC metallization is a key lever in the GPC 3.0 upgrade. GCL SI also notes progress in advanced metallization such as 0BB and other silver‑reduction approaches, supporting the industry shift toward lower per‑watt silver consumption and improved cost resilience.
- Materials consistency & sustainability with FBR granular silicon: Leveraging in‑house FBR granular silicon, GCL SI enhances material uniformity and strengthens its sustainability profile, supporting both performance consistency and lower‑carbon manufacturing, which is increasingly valued in international distributed markets.
Looking ahead, GCL SI is committed to driving the global large‑scale adoption of BC technology to support worldwide carbon neutrality goals. With GPC 3.0 as a strategic cornerstone, the company will continue pushing efficiency boundaries and low‑carbon innovation across distributed solar applications, and to build a cleaner, more resilient energy future.
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GCL SI Officially Launches Back-Contact Modules at Intersolar Europe 2026
DUBAI, UAE, June 24, 2026 /PRNewswire/ -- Mantle, the premier distribution layer connecting traditional finance and on-chain liquidity, today announced the listing of USPXx, xStocks' tokenized representation of Franklin Templeton's Franklin U.S. Equity Index ETF (USPX), now available for 24/7 on-chain trading and liquidity provision via Fluxion, Mantle's native decentralized exchange.
With $1.98 billion in assets under management, USPX tracks the top 85% of the US equity market by market capitalisation, one of traditional finance's most widely held passive equity vehicles. Its arrival on Mantle opens continuous, around-the-clock access to that exposure, without market hours constraints or intermediaries.
Expanding the Distribution Layer for Tokenized Capital Markets
As one of the first Ethereum Layer 2 networks to bring a tokenized ETF from one of the world's largest asset managers on-chain, Mantle's distribution layer now extends beyond individual equities to broad-market index products. USPXx joins a growing lineup of xStocks tokenized equities on Mantle, including the recent listing of SPCXx, xStocks' tokenized SpaceX equity which went live on Mantle on the same day as the SpaceX IPO.
For investors already allocated to USPX through conventional brokerage accounts and for a global audience without access to US markets, USPXx on Mantle removes the constraints of traditional market infrastructure entirely. Via Fluxion, USPXx is tradeable and available for liquidity provision at any hour, without intermediaries, settlement delays, or geographic restrictions. Underpinning this is xChange, xStocks' Atomic RFQ, which ensures every transaction is executed at institutional precision regardless of when or where a user trades.
Institutional-Grade Execution via Atomic RFQ and AMM on Fluxion
USPXx is natively minted on Mantle through xStocks and trades exclusively on Fluxion, powered by xChange, xStock's Atomic RFQ system. Where conventional on-chain trading relies on automated market makers that introduce slippage and pricing deviations, xChange sources every transaction directly from the issuer at live market quotes, enabling users to transact at the real price, not one approximated through a liquidity pool all around the clock.
This sets the standard for institutions as this translates to execution precision that meets the requirements of meaningful capital deployment at scale. While for retail investors, it means access to broad US equity market exposure at fair, verifiable prices, at any hour, globally. Fluxion is the only decentralised exchange on Mantle listing USPXx at launch.
"Franklin Templeton's USPX represents the mainstream of global equity investing, the kind of exposure that anchors institutional and retail portfolios alike," said Emily Bao, Key Advisor at Mantle. "Every listing like this closes the distance between where the capital sits today and where it can move tomorrow."
About Mantle
Mantle positions itself as the premier distribution layer and gateway for institutions and TradFi to connect with on-chain liquidity and access real-world assets, powering how real-world finance flows. With over $4B+ in community-owned assets, Mantle combines credibility, liquidity, and scalability with institutional-grade infrastructure to support large-scale adoption. The ecosystem is anchored by $MNT within Bybit, and built out through core ecosystem projects like mETH, fBTC, MI4 and more. This is complemented by Mantle's partnerships with leading issuers and protocols such as Ethena USDe, Ondo USDY, and OP-Succinct.
For more information, visit mantle.xyz.
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For media enquiries, please contact: contact@mantle.xyz
About xStocks
xStocks is the industry benchmark for tokenized equities, bringing publicly listed U.S. stocks and ETFs on-chain through fully collateralized, 1:1-backed tokens. Powered by Payward's digital asset infrastructure, xStocks places traditional equities on blockchain infrastructure, expanding access to U.S. capital markets with extended availability, global reach, and seamless digital-native settlement.
Designed for interoperability, xStocks move seamlessly between centralized exchanges, self-custodied wallets, and on-chain applications, unlocking new utility across trading, collateralization, and decentralized finance. Since launching in June 2025, xStocks is powering billions of dollars in transaction volume across multiple blockchain ecosystems and anchors a rapidly expanding global network shaping the future of tokenized markets.
For more information, visit https://xstocks.fi.
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Mantle Becomes One of the First Ethereum L2s to Bring Franklin Templeton's USPX ETF On-Chain with xStocks
