DAS Solar has exhibited at the 2025 edition of Intersolar Europe, showcasing its flagship products including the DAS Black series, Diamond series back-contact (DBC) and lightweight modules.
The company continues to drive breakthroughs in TOPCon development, its TOPCon 5.0 cells having reached 27% efficiency in mass production, with an open-circuit voltage of 746 mV and module efficiency of up to 23.8%.
Its DBC modules attracted significant attention from visitors. Built on a next-generation N-type back-contact (BC) structure, the modules utilize advanced TOPCon 5.0 tunnel oxide layers and full-passivation techniques. The front side is completely busbar-free, eliminating light obstruction and significantly boosting conversion efficiency. The DBC 4.0 cells have reached 27.2% efficiency and 747 mV in open-circuit voltage, with module efficiency of up to 24.8%. Featuring a sleek, modern design and low temperature coefficient, they offer both aesthetic and performance advantages across distributed PV applications.
While N-type modules dominate the market with their high power, low degradation and bifacial advantages, UV-induced degradation (UVID) remains a concern in large-scale TOPCon deployment. To tackle this challenge, DAS Solar has implemented atomic layer deposition (ALD) technology to enhance the UV resistance of hydrogen-silicon bonds. Partnering with industry-leading material suppliers, the company has also developed a multi-layer encapsulation structure to ensure optimal compatibility between cell and encapsulant. This innovation ensures long-term power stability even under intense UV exposure, reducing maintenance costs and maximizing system performance throughout the module life-cycle.
As competition intensifies across the solar industry at large, the company is targeting solutions for niche markets. Its self-cleaning module, featuring an innovative short-edge frameless design, enables rapid drainage of rainwater and dust even on rooftops with low tilt angles (as low as 5°).This reduces hot spot risk and cleaning costs, making it ideal for the dusty environments to be found in Southern Europe and the Middle East.
DAS’ lightweight module, designed with a glass-free encapsulation structure, weighs just 4.7 kg/m², over 50% lighter than conventional equivalents. Able to withstand 5400Pa snow load and 2400Pa wind load, it offers high durability and excellent fire resistance and is well-suited for rooftops with limited structural load capacity, such as metal-clad and aging industrial buildings.
