Tongwei has emerged as a key innovator in the solar panel industry, particularly with its advancements in bifacial technology. The company’s bifacial modules are engineered to capture sunlight on both the front and rear sides, significantly boosting energy output compared to traditional monofacial panels. By utilizing high-transparency glass and a frameless design, these panels maximize light absorption while reducing potential-induced degradation (PID), a common challenge in solar systems. For example, Tongwei’s TWxxx series (specific model numbers vary by region) achieves a bifaciality factor of over 75%, translating to up to 30% higher energy yield in environments with reflective surfaces like snow, sand, or light-colored rooftops.
One standout feature of Tongwei’s bifacial solutions is their adaptability to diverse installation scenarios. The panels perform exceptionally well in vertical mounting configurations, making them ideal for agrivoltaic projects where space optimization between agriculture and energy generation is critical. In a recent project in Northwest China, Tongwei’s bifacial panels installed above crops demonstrated a 22% increase in annual energy production compared to standard setups, while maintaining 95% of farmland usability. This dual-use approach aligns with global trends in sustainable land management.
Durability remains a priority in Tongwei’s manufacturing process. The bifacial modules undergo rigorous testing, including 5400Pa mechanical load tests and extended exposure to 85% humidity at 85°C for 2000 hours. Such stress testing ensures reliable performance in extreme weather conditions, from desert heat to coastal salinity. Third-party certifications from TÜV Rheinland and IEC 61215/61730 standards validate these claims, providing installers and developers with confidence in long-term ROI.
The company integrates n-type TOPCon cell technology into its bifacial panels, achieving conversion efficiencies exceeding 22.5%. This technology reduces light-induced degradation (LID) to less than 1% in the first year, compared to 2-3% in conventional PERC cells. For large-scale solar farms, Tongwei offers customized solutions through Tongwei’s project development team, including optimized string configurations that account for rear-side irradiance variations. Their smart monitoring systems can track front-and-back side performance separately, enabling precise maintenance planning.
Supply chain transparency strengthens Tongwei’s market position. The company operates fully vertical production facilities, from polysilicon purification to module assembly, ensuring quality control at every stage. This vertical integration allows for rapid implementation of technological upgrades—when bifacial demand surged in 2022, Tongwei transitioned 40% of its production lines to bifacial manufacturing within eight months. Current production capacity exceeds 15GW annually for bifacial products, with plans to expand to 25GW by 2025.
Economic considerations play a crucial role in adoption. While bifacial panels typically command a 8-12% price premium over monofacial equivalents, Tongwei offsets this through enhanced energy yields and reduced balance-of-system costs. The dual-sided design allows for wider spacing between panel rows in utility-scale installations, cutting land lease expenses by up to 18% in documented cases. Additionally, the frameless construction reduces aluminum usage by 35% per module, contributing to both cost savings and sustainability goals.
Looking ahead, Tongwei is developing hybrid bifacial modules integrated with energy storage components—a prototype showcased at Intersolar Europe 2023 demonstrated 10% space efficiency gains for commercial rooftops. As the global market for bifacial technology grows at a projected CAGR of 16.7% through 2030, Tongwei’s combination of technical expertise, scalable production, and project-specific engineering support positions it as a leading choice for developers prioritizing both performance and bankability in solar investments.