JinkoSolar’s Global Tech Day, held on October 16–17 in Shanghai, has brought together customers academia, and industry leaders from around the world to explore the future of PV and energy storage technology, underscoring the company’s pioneering position at the frontier of solar and storage, and their convergence with AI.
At the event, the company unveiled its Tiger Neo 5.0, a power-by-design module built on its all-new TAC technology. The product is designed to redefine the upper limits of what a scenario-specific module can deliver, in both appearance and efficiency, for villas and other architecturally refined residences.
The first version to reach the market, an all-black 48-cell module, delivers a maximum power output of 510 W with a module efficiency of 25.52%. Unlike conventional BC modules, it presents a deeper, more uniform and more refined black appearance. Semiconductor-grade low- and high-temperature processes bring the power-temperature coefficient down to -0.24%/℃, meaning stronger energy yield in high-temperature environments.
TAC technology is not simply a back-contact structure — it is a genuine advance in cell technology. It combines the excellent carrier transport of TOPCon with the low-temperature processing and positive electrode passivation of HJT, pushing peak cell efficiency to 28%, approaching the theoretical limit of monocrystalline silicon cells. Together with zero-gap cell layout and hidden-ribbon technology at module level, it achieves a module efficiency of 25.52% — one of the highest in mass production today. Compared with conventional back-contact products, it delivers approximately 30 W more power, a lower temperature coefficient, and a deeper, more premium black appearance that blends seamlessly into villa rooftops — especially dark-coloured ones — making it the undisputed leader in both power and aesthetics in the residential module category.
TAC: 2 + 1 — Two Cell Technologies plus One Structural Optimization
1. Heterojunction passivation on the p-type emitter (HJT technology)
An intrinsic amorphous silicon layer and a doped amorphous silicon layer are introduced on the p-type emitter region of the cell. Leveraging the excellent chemical passivation at the amorphous-silicon/crystalline-silicon interface, surface recombination is significantly suppressed, delivering a higher open-circuit voltage (Voc). Meanwhile, low-temperature metallization minimizes surface damage and substantially reduces thermal stress on the cell.
2. Tunneling passivated contact on the n-type region (TOPCon technology)
The n-type rear-field region adopts an ultrathin silicon dioxide (SiO₂) layer combined with a heavily doped polysilicon (poly-Si) structure. The quantum tunneling effect enables highly selective transport of majority carriers while blocking minority carriers, ensuring a high fill factor (FF) and low series resistance.
3. Back electrode interconnection (Grid-Free Front)
Through high-precision laser patterning and dielectric-film isolation, these two fundamentally different passivated contact structures are integrated onto the rear side of a single silicon wafer, leaving the front side completely free of metal shading for full optical absorption.
For villas and other high-end residential applications, front-side efficiency and appearance are essential requirements: roof space is limited, architecture is meticulous, and household electricity consumption is high. Tiger Neo 5.0, powered by TAC technology, elevates both front-side power and aesthetics to a new level.
The introduction of TAC technology and the Tiger Neo 5.0 marks the industry’s transition from “inclusive technology” — one technology for all applications — to “specialized expert technology” — one technology for one scenario.
Utility-scale power plants, commercial and industrial projects, and emerging applications such as data centres, agrivoltaics, desert and Gobi regions, floating PV on lakes, offshore PV, redevelopment of degraded land, agricultural irrigation, solar-to-hydrogen and vertical installations on highway noise barriers will continue to rely heavily on the Tiger Neo 3.0 TOPCon series, with its high power, high efficiency, high bifaciality, and strong yield under low-light conditions in early mornings, late afternoons, and overcast or rainy weather. Higher overall energy yield and higher energy yield per watt — the two metrics that directly determine LCOE and project returns.
Whether for today’s single-junction cells or tomorrow’s tandem cells, TOPCon remains the unavoidable core foundation for future high-performance technology development. A broad range of next-generation technologies — including space-based PV, perovskite tandems, and the introduction of superconducting materials — will be developed on this TOPCon platform.
As R&D evolves toward AI-enabled automated laboratories and closed-loop scientific discovery, TOPCon and TOPCon-derived structural optimizations have surpassed 700 GW of global installations — the largest installed base, and the largest and highest-quality body of field data of any platform technology in history. Building on this field data, combined with installation conditions and climate environments, JinkoSolar’s R&D team has developed precision simulation models that faithfully reconstruct the underlying physics. The company’s research team is now fully embracing AI-driven scientific discovery, continuously delivering reliable and accurate computational results at massive scale — a solid basis for future technology roadmap choices and process improvements.
