Policy design for green hydrogen.

Much uncertainty surrounds the cost-effective deployment of green hydrogen technologies. Policy must navigate this uncertainty when deciding on policies of support. However, evidence to guide this process is scattered across multiple disciplines. This paper collates findings from fields of economics, engineering, political economy and behavioural science. We propose a method of progressive elimination to navigate the disparate strands of literature and associated uncertainties. We demonstrate a method to identify likely timescales of cost-effective deployment and associated policy interventions, for electricity, space heat, transport and industrial applications, conditional on assumed cost trajectories. The procedure proposed in this paper may be applied to many contexts and will be of increasing importance as decarbonisation constraints continue to bind. • Multidisciplinary literature review (economics, engineering, political economy and behavioural science) to inform hydrogen deployment and policy decisions. • Framework to navigate disparate literatures for policy decision-making proposed. • Public support for hydrogen-based heating systems is a high-risk strategy. • Many applications are market-driven and policy intervention should focus on facilitating timely adoption of those technologies. • Access to credit and behavioural interventions of particular importance for household-level interventions. [ABSTRACT FROM AUTHOR]