I am an interdisciplinary researcher in renewable energy and environmental science, based in the Climate Policy Group at ETH Zürich’s Department of Environmental Systems Science. My current research focus is the global transition to a 100% clean and renewable energy system, and the technical, economic and policy barriers on the way to that goal.

In the course of my work I created and lead development of the open-source energy system modelling tool Calliope. I am also the creator and lead developer of the Renewables.ninja platform to simulate wind and solar power plants worldwide.

Recent publications

  • The increasing impact of weather on electricity supply and demand. Iain Staffell and Stefan Pfenninger. (2018). Energy. doi: 10.1016/j.energy.2017.12.051
  • Opening the black box of energy modelling: Strategies and lessons learned. Stefan Pfenninger, Lion Hirth, Ingmar Schlecht, ..., Tim Tröndle, Clemens Wingenbach. (2018). Energy Strategy Reviews. doi: 10.1016/j.esr.2017.12.002
  • Balancing Europe's wind-power output through spatial deployment informed by weather regimes. Christian M. Grams, Remo Beerli, Stefan Pfenninger, Iain Staffell, Heini Wernli. (2017). Nature Climate Change. doi: 10.1038/nclimate3338

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