Energy transitions depend on coordination across interdependent actors, infrastructures and practices. As electrification, sector coupling and decentralisation reshape energy systems, governance challenges have shifted from control-oriented delivery towards problems of interaction, responsibility and system coordination, yet governance arrangements continue to struggle with persistent coordination failures across institutional contexts. This article argues that such difficulties cannot be explained as implementation problems or insufficient cooperation alone. Coordination failures are conceptualised as manifestations of a mismatch between how energy systems function and how they are governed, distinguishing supply-chain governance assumptions from energy systems operating as service networks. The analysis shows how prevailing governance remains oriented towards linear responsibility and asset-based performance, even as outcomes increasingly depend on coordinated action and resource integration in use. Network-based arrangements represent partial adaptations that acknowledge interdependence without reconfiguring underlying governance logics. Building on this diagnosis, three design principles-relational accountability, alignment-based performance measurement, and constitutive coordination-clarify what a genuine shift in governance logic would entail, as distinct from adaptive overlays. The framework is illustrated through regional energy governance experiences in Sweden and comparable European settings, clarifying why coordination failures persist in sustainability transitions characterised by complex socio-technical interdependence.