In order to ensure the future sustainability of humanity, it is necessary to implement the sustainable, green transition as quickly and efficiently as possible. The green transition represents tasks in practically all areas of human activity, but one of its priority areas is the reduction of greenhouse gas emissions associated with different activities. One of the key areas is the issue of carbon footprint related to transport. In the field of transport, the focus of the European Union and Hungary is currently the transition to electromobility. The expected expansion of electromobility poses serious challenges for the domestic and EU electricity system, the solution of these challenges requires a series of coordinated and environmentally sound measures. This article summarises the most important challenges facing the Hungarian electricity sector, discusses their effects on the energy trilemma and summarises possible solutions. With statistical data, it explores the structural changes seen in the field of national electricity generation in the past decade and analyses the impact of the spread of renewable energy sources on domestic electricity imports. It also proposes to introduce a comprehensive analysis and modelling approach to ensure the sustainability impact of the necessary measures.