The Joule Model shows that by 2050 the European energy system is heavily electrified and runs on a mix of wind, solar, small modular nuclear reactors and flexible gas that can be switched on when needed. Electricity will cover a significant portion of final energy. Industry still the biggest user with transport climbing fast. The hydrogen economy will begin to mature with its main use in steel, chemicals and fuel synthesis. Liquid fuels stay important for aviation and shipping.

Methane is supplied predominately by biomethane with a smaller share of LNG kept for security. Variable wind and solar are supported by expanded transmission lines, hydro power, long‑duration hydrogen storage, batteries and demand‑response programs.

Around a quarter of electric vehicles now feed power back to the residential owners, helping balance evenings and winter peaks.

Nuclear small modular reactors provide steady low‑carbon power and improve grid stability when wind and solar is weak.