The transport sector is currently on the verge of major transformation. In response to increasing sustainability expectations, a rearrangement has started in the field of drivetrain solutions commonly used in road transport, and new drivetrain solutions have come to the fore. Of these, electromobility has the greatest development potential, partly due to the availability of technology and partly due to the evolution of strategic and policy objectives. Electromobility clearly contributes locally to reducing environmental burdens, but with the expansion of the system boundaries of the analysis, the picture becomes more nuanced. The spread of electromobility is a serious challenge for the electricity sector supplying it, which requires a number of complex measures to solve. One of them is the efficient integration of renewable energies with the development of energy storage solutions. This article examines the role of transport in greenhouse gas emissions, analyses the importance of renewable energy sources for truly sustainable operation, and discusses the importance and issues of modelling solutions of future production and consumption. In connection with the latter point, the model of a virtual energy test ecosystem is briefly presented, which can contribute to answering sustainability questions related to electromobility.