Can Roll-to-Roll technology pave the way for perovskite devices to transition from lab-scale to industrial applications? It is a technique that has the potential to enhance throughput, reduce costs, and accommodate flexible substrates. In a Roll-to-Roll system, as long as your input materials are continuously topped up, manufacture should continue indefinitely. In its simplest form it offers the premise of Ink-IN / Solar module-OUT. Through this comment, we emphasize the critical need for ongoing innovation to fully harness Roll-to-Roll technology’s capabilities, making perovskite solar energy a viable, sustainable option on a global scale.