The levelized cost of hydrogen (LCOH) must be reduced for green hydrogen production to meet net-zero demands. In collaboration with FEV Consulting, Gore conducted a study to evaluate the impact of Proton Exchange Membrane (PEM) attributes on the LCOH in the following three use case scenarios: steel mill, offshore wind plant and a PV hydrogen production hub. The “material to system level” model compared the GORE® PEM M275.80 to a relevant Market PEM as well as against a reference Alkaline electrolysis system. The results demonstrated that the PEM properties of proton resistance and hydrogen permeation resistance have a critical effect on the overall system efficiency and therefore on the LCOH.