Due to the lack of in-depth research on lamination processing methods for PV/T technology, typical flat-plate PV/T modules still face severe lifespan issues that require urgent solutions. Thus, this study proposes a specialized two-stage lamination process method. The efficacy of this process flow in addressing the challenging issue of microscopic hidden cracks in PV cells, which commonly occurred during the processing of PV/T modules, was confirmed through a comprehensive electroluminescence testing procedure. An analysis was conducted to examine the interrelationship between the thermal pressing process, peel strength, and crosslinking degree of the hot-melt adhesive film on both the absorber plate and external surface of the transparent TPT (Tedlar/PET/Tedlar) layer. The results indicated that a high level of peel strength (50 N/cm to 80 N/cm) was achieved between the adhesive film and absorber plate with a selective absorption coating, while ensuring compliance with crosslinking requirements and preventing bubble issues. Therefore, the novel process method proposed in this paper for PV/T modules can effectively address the bottleneck of lifespan issues that have remained unresolved in PV/T technology for years.