Perovskite solar cell (PSC) technology has significant potential to revolutionise the photovoltaics (PV) industry due to high efficiencies and the potential for short energy payback periods in comparison to other established PV technologies making them truly competitive. Recently, solution processed PSCs have reached cell efficiency values outperforming those of established thin-film photovoltaic (PV) technology (CIGS, CdTe), and even crystalline Si (c-Si) records. The challenge is now to transfer this unprecedented progress from its cell level into a scalable, stable, low-cost technology on module level.