The perovskite solar era has demonstrated 25.5% efficiency in only 10 years of research, reaching the performance levels of other photovoltaics technologies such as Si and GaAs, showing potentially low-cost manufacturing and process versatility. However, these results are achieved only on small area cells, with an active area equal or lower to 0.1 cm ². The upscaling development of perovskite solar technology requires the use of additional processes to reduce losses encountered for large areas; for this reason, laser processing becomes necessary to design connected cells into modules. In this work, cell-to-module losses in perovskite solar modules are reduced by optimizing the laser design, establishing a relationship between geometrical fill factor, cell area width, and P1–P2–P3 laser parameters. Upscaling the process from 2.5 × 2.5 to 10 × 10 cm ² an efficiency of 18.71% and 17.79% is achieved on active area of 2.25 and 48 cm ² respectively, with only 5% relative losses when scaling from to minimodule to module size. A minipanel is fabricated on 20 × 20 cm ², showing 11.9% stabilized efficiency and 2.3 W on an active area of 192 cm ², among the highest reported in literature so far at this size.