Trina Solar announces 907 W tandem solar module with 29.2% efficiency
Chinese PV manufacturer Trina Solar has unveiled a 907 W n-type TOPCon-perovskite tandem solar module.
According to the company, the module achieved a full-panel conversion efficiency of 29.2% in testing by Germany’s TÜV SÜD. The product is reportedly designed for mass production, rather than a laboratory-scale sample.
The module uses a two-terminal tandem cell architecture combining an n-type TOPCon crystalline silicon bottom device with a perovskite top cell. The design is intended to absorb a broader part of the solar spectrum than conventional single-junction silicon modules.
The module measures 2,384 mm by 1,303 mm and is based on 210 mm wafer technology. It incorporates large-area perovskite film deposition, tunnel recombination contact technology, and high-reliability encapsulation.
The company said its slot-die coating and vapor-assisted crystallization process improved film uniformity in large-area perovskite layers, while a composite indium tin oxide (ITO) tunneling layer wass used to reduce recombination losses between the top and bottom cells.
The panel also utilizes dual-layer co-extruded polyolefin elastomer (POE) encapsulation and a low water-vapor transmission backsheet, along with perovskite-specific sealing materials. According to Trinasolar, the product has passed International Electrotechnical Commission (IEC) 61215 and IEC 61730 reliability testing, including potential-induced degradation (PID), damp heat, thermal cycling, and ultraviolet (UV) aging tests.
Trinasolar said it plans to accelerate production of its perovskite-silicon tandem module line in 2026, though large-scale commercial shipments are expected to begin in 2028–2029, according to a recent investor communication.
In December, the manufacturer announced that an industrial-scale tandem solar cell using a 210 mm half-cut format achieved a certified power conversion efficiency of 32.6%, while a standard-size tandem module integrating the cells delivered a peak power output of 865 W. It said both results have been independently verified by European testing bodies and represent world-record performance for industrially relevant formats.
Trina Solar said the latest results build on a series of tandem milestones reported over the past two years, including certified tandem modules exceeding 800 W and tandem cell efficiencies above 31% on industrial wafer formats. The company claimed it has now created or broken global benchmarks in solar cell efficiency or module power output 37 times.
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Great to see Trina Solar pushing the boundaries with their 907 W tandem module! The efficiency at 29.2% is impressive and could really change the game for large-scale solar projects. I’m curious, though, how do you think this will impact other manufacturers in terms of competition? Any thoughts on potential innovations we might see as a result? geometry dash lite
Trina Solar pushing a 907 W tandem module at 29.2% efficiency is seriously impressive. It’s wild to see solar technology advancing toward higher output while hopefully keeping reliability and real-world durability in mind. That kind of leap feels almost as surprising as discovering a new strategy in fnaf, the iconic horror game that delivers a truly tense and suspenseful experience—although at least solar testing doesn’t involve animatronics appearing in the dark. I’m curious how quickly modules like this could become practical for large-scale projects, especially if manufacturing costs and installation requirements remain manageable. Do you think tandem modules will become the standard for utility-scale solar, or will traditional silicon designs remain dominant for years?