GengWeng Huang, Executive Dean of GCL SI’s Cell Research Division, described back-contact as the ultimate architecture for crystalline silicon, noting that traditional formats like TOPCon and HJT are approaching their physical efficiency limits. The GPC 3.0 series aims to address these bottlenecks by offering 475–500 W output and conversion efficiency reaching up to 24.05%. The first shipments are already transit to Europe to support immediate commercial deployment.
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GCL SI Shifts to Back-Contact Technology at Intersolar Europe
At Intersolar Europe 2026, GCL System Integration officially pivoted its strategic roadmap toward back-contact cell architecture. The company unveiled its flagship GPC 3.0 module, a high-efficiency, all-black panel designed for the competitive distributed solar market, signaling a move to capture premium residential and commercial rooftop demand across the continent.
The GPC 3.0 modules feature a full-screen design that removes front-side busbars to improve aesthetics and light absorption. By utilizing advanced passivation and multi-layer gradient dielectric films, the panels minimize surface recombination losses. GCL SI reports that its mass-produced GPC cells have achieved an average conversion efficiency of 28.38%. To maintain cost competitiveness, the company has integrated 0BB metallization techniques and FBR granular silicon, which reduce reliance on silver and enhance manufacturing sustainability. The product includes a 30-year linear power warranty, with the company promising an annual degradation rate of just 0.35%.
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