This article critically interrogates the over-emphasis upon urban solutions when considering complex and multi-scalar energy infrastructures that must transition to low-carbon intensity for a sustainable future. While urban actors can play an important role in energy transition, their interventions are riven with difficulties, and at times failure, as they encounter challenges of politics, capacity and agency in a broader and multi-scalar governance landscape. Drawing upon the comparative and variegated political economies of energy infrastructure governance in Germany and the UK, this article makes three critical arguments. Firstly, it contends that patterns of ownership of key infrastructures, particularly in the highly privatised context of the UK but also in Germany’s more diversified energy market, trouble urban-level interventions. Secondly, against a backdrop of post-financial crash austerity, we raise the issue of capacity at an urban level, principally concerning the financing and technical administration of urban infrastructural ‘solutions’. Thirdly, the entrenched politics of neoliberalisation, its multi-scalar articulations and in particular discourses of marketisation and competition, while distinct across the two contexts, shape the possibilities, imaginaries and support available for local-level change in complex infrastructures. The article points to differential urban capacities and governance conditions that require a greater degree of nuance in sustainability narratives, and a critical conversation around the need for multi-scalar coordination in energy transitions, in order to avert catastrophic climate breakdown. [ABSTRACT FROM AUTHOR]