The transition from internal combustion engines to electric propulsion for road-cargo systems is on-going and faces multiple challenges for the involved actors and affected stakeholders. The product development of, for example, future battery electric heavy trucks for long distance hauling requires new perspectives on concept evaluation and selection due to high data uncertainty. These new perspectives are needed to satisfy the business objectives of both OEMs and transport providers, while also fulfilling an overall set of requirements, including environment-related ones. From a society point of view, public investments in electric power generation and distribution grids will be needed as use of electric energy will increase. These public investments need to be balanced and prioritized with other expenses. The investments in new technology in terms of battery electric haulers made by the transport providers need to be profitable and competitive with respect to utilization rate and cargo transport efficiency. The time duration of the mentioned activities is significantly different, which adds more complexity. The complexity of the road cargo system as a whole can be modelled as a system-of-systems, as the constituent systems like truck, transport and energy providers as well as energy and road infrastructure are independent managerially and/or operationally systems themselves. This paper describes the state and outlook of the conceptual modelling of key components in a general road cargo system of systems framework.