A study by Aarhus University and the Technical University of Denmark explored Europe’s energy transition. It found climate neutrality by 2050 is feasible with national self-sufficiency. Each country must generate as much energy as it consumes annually. The model showed an average cost increase of only 2.1% compared to the least-cost scenarios. Nations like Belgium and the Netherlands may face up to 150% cost rises. Solar power is central, with single-axis tracking and east-west panel tilts proving effective. Under-dimensioned inverters also offer financial advantages. These solutions suit land-constrained regions. Energy self-sufficiency includes trading synthetic fuels across borders. Achieving these needs higher renewable growth rates. Researchers urged EU policymakers to adopt advanced solar technologies and ensure a coordinated, fair energy transition.