At this year’s Intersolar Europe in Munich, Tongwei will debut its new BIFIMAX module variant, which pushes bifaciality from 80% to 90%. The variant is designed for high-latitude, high-albedo markets. It will be applicable across the entire Tongwei TNC family of modules – from TNC 1.0 through TNC 3.0.
To accomplish the gains in bifaciality, BIFIMAX incorporates two complementary advances. The first is Tongwei’s Poly Tech，which retains the core POLO passivation layer underneath the electrode but removes the other layers to allow more light to pass through. The second advance is a novel rear-surface light-trapping structure that captures photons that would otherwise escape. As a result, rear-side generation capacity increases by +10 index points, single-watt energy yield improves by 0.6%~0.8%, and low-light performance is boosted by 1.6%.
The financial case is grounded in project data. Tongwei tracked the data from a 100 MW ground-mounted solar project with single-axis trackers in Hamburg, Germany, that upgraded from a conventional 625 W module at 80% bifaciality to the TNC BIFIMAX 670 W at 90% bifaciality. The project data showed a CAPEX reduction of 0.87 euro cents per Watt — a 2.63% savings worth approximately €870,000 at the project level — before a single kilowatt-hour had been generated. Data also showed that the LCOE fell by 3.39%, directly strengthening bankability across the project’s entire operating life.
Over 30 years, BIFIMAX is expected to generate approximately 81,600 MWh more than the baseline — enough to power around 25,000 European households for a year — translating to roughly €180,000 in additional annual revenue.
With the launch of the BIFIMAX module variant, Tongwei bolsters its dedication to using its technological expertise to meet the growing demand for solar PV installations across a broad spectrum of terrains and scenarios.
Visit Tongwei at Intersolar Europe 2026, booth A2.350, to experience the full product lineup.
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