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A solar-focused build-out and moderate growth in other renewables lead to winter imports and a high summer surplus
sun
Focus on rooftop-PV
Build-out focussed on rooftop-PV largely compensates demand growth and nuclear decomissioning (after 60 years)
sun
Accelerate PV build-out smoothly
PV addiditions grow as installation technicians are added. Gradual growths, no jumps, no alpine PV
wind_turbine
Wind&hydro: few additions
Wind additions are very limited, hydro capacity doesn't change over time
valve
Gas for last nuclear plant
Gas is needed in winter to compensate decomissioning of last nuclear plant, in 2044
Energy Mix
Production
Demand
Production
2024
Total generation 69 TWh
2050
Total generation 104 TWh
Demand
2024
Total demand 63 TWh
2050
Total demand 88 TWh

Pros and Cons
Pros:
    Cons:
      The assumed electricity production and demand in 2050

      Pros:
        Cons:
          Transition
          The energy mix as we transition to 2050
          Demand
          Import
          PV
          Wind
          Hydro
          Biomass
          Gas
          Geothermal
          Nuclear
          Fossil
          Challenges
          tactic
          Import Dependency
          Import needs after nuclear decomissioning require neighbor surplus and EU agreement
          energy_export
          High summer surplus
          Summer surplus rises from 9 to 22 TWh in 2050. Unclear how much of it can be exported.
          money
          Additional costs possible
          If summer surplus cannot be exported, the costs per MWh would rise
          About the scenario developer
          Helion
          Helion
          Helion is a leading Swiss company specializing in the installation of solar systems and energy storage solutions. It plays a key role in Switzerland’s energy transition by providing affordable and efficient solar power solutions to homes and businesses.
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          Axpo Renewables A balanced build-out of renewables, focusing on solar and wind. Green gas as winter-backup

          Legend

          A projection of the energy mix, demand and production for the year 2050 for the given scenario.
          HydroPVNuclearWindGasBiomassFossilGeothermal Other
          D : Demand • P : Production • Δ : Production Surplus
          Axpo Landscape Ambitious nuclear and rooftop solar expansion to avoid landscape-impacting wind and alpine solar units

          Legend

          A projection of the energy mix, demand and production for the year 2050 for the given scenario.
          HydroPVNuclearWindGasBiomassFossilGeothermal Other
          D : Demand • P : Production • Δ : Production Surplus
          Energy Law ("Mantelerlass") Targets of 35 TWh of renewable energy by 2035 and 45 TWh by 2050, plus 6 TWh of renewable winter electricity, of which 2 TWh hydropower

          Legend

          A projection of the energy mix, demand and production for the year 2050 for the given scenario.
          HydroPVNuclearWindGasBiomassFossilGeothermal Other
          D : Demand • P : Production • Δ : Production Surplus
          Business as usual Without increased investments, winter imports will rise to unsustainable levels, making blackouts likely after the nuclear shutdown

          Legend

          A projection of the energy mix, demand and production for the year 2050 for the given scenario.
          HydroPVNuclearWindGasBiomassFossilGeothermal Other
          D : Demand • P : Production • Δ : Production Surplus
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