Energetica India Magazine March - April 2026

TOPCON MANUFACTURING energetica INDIA- Mar-Apr_2026 45 module wattage beyond 600 W. This helps reduce balance-of-system costs for projects, which is important for utili- ty-scale installations. However, larger formats introduce mechanical and han- dling challenges during manufacturing. Maintaining cell integrity, alignment, and lamination quality becomes more demanding. Scaling these formats re- quires careful optimisation of produc- tion lines. TOPCon modules are typically bifa- cial, meaning they generate power from both the front and back sides. This can increase energy yield in real-world con- ditions, especially in installations with reflective surfaces. However, bifacial performance depends not only on installation conditions but also on manufacturing consistency. Vari- ations in cell quality or glass transparen- cy can lead to uneven performance. So while bifaciality offers a clear advantage, it also adds another layer of quality de- pendence. Cost reduction in TOPCon manufactur- ing does not come only from increasing capacity. It comes from stabilising the process. When production runs are sta- ble, with high yield and low defect rates, cost per watt naturally decreases. If pro- cesses are unstable, scaling can actually increase losses because more defective output is produced. This is why compa- nies focusing on TOPCon scaling prior- itise process stability over rapid expan- sion alone. At multi-gigawatt scale, data becomes an important asset. Every stage of pro- duction generates data—temperature profiles, deposition rates, defect pat - terns, efficiency variations. The ability to analyse this data and act on it quickly determines how efficiently a plant runs. Over time, this creates a learning curve advantage. A manufacturer producing at higher volumes gains more operation- al insight, which helps improve perfor- mance further. This is one of the key benefits of scaling early and aggressively. Another important aspect is reliability. Solar projects are long-term investments, often expected to perform for 25 years or more. For manufacturers, this means that scaling production must not com- promise long-term module performance. Degradation rates, PID resistance, and encapsulation quality must remain con- sistent. Any compromise at the manu- facturing stage can lead to performance issues later, which affects credibility in global markets. For Rayzon, scaling TOPCon to multi- GW levels indicates a shift toward more controlled and process-driven manu- facturing. It reflects a move away from simply increasing capacity to focusing on how that capacity performs. The tran- sition also aligns with global demand trends, where buyers are increasingly looking for higher efficiency, better ener - gy yield, and reliable long-term perfor- mance. In practical terms, scaling TOPCon suc- cessfully requires four things to work together: stable processes, high yield, consistent material quality, and strong data-driven decision-making. If any one of these is weak, scaling becomes inef- ficient. If all of them are aligned, scale becomes a real advantage. The industry is moving in this direction, but execution is uneven. Some manufac- turers have installed TOPCon lines but are still optimising yields. Others are focusing on improving consistency be- fore expanding further. The difference between these approaches will become clearer over time as large-scale perfor- mance data becomes available. For now, what stands out is that TOPCon is no longer just a technology upgrade. At multi-gigawatt scale, it becomes a test of manufacturing capability. The companies that manage to control their processes, maintain high yields, and de- liver consistent performance will define the next phase of solar manufacturing.