For PC, STH efficiency has to exceed 6% and it is important to lower the catalyst concentration (< 0.2 g(Catalyst)/L) by developing catalysts with large absorption cross sections. With a sufficiently high STH efficiency and low catalysts concentration, high catalyst cost (> 2000 $/kg(Catalyst)) and a short lifetime (ca. 0.5 years) can be tolerated, pointing towards the potential utility of homogeneous photocatalysts. Improvements of the photocatalyst open a path to cost-competitive H2 production using PC, which could be a complementary technology to PV+E due to the low CAPEX of the plastic baggie reactor construction.