@article{SchoenigerThonigReschetal.2021,
  author    = {Sch{\"o}niger, Franziska and Thonig, Richard and Resch, Gustav and Lilliestam, Johan},
  title     = {Making the sun shine at night},
  series = {Energy sources. B, Economics, planning and policy},
  volume    = {16},
  journal   = {Energy sources. B, Economics, planning and policy},
  number    = {1},
  publisher = {Taylor \& Francis Group},
  address   = {Philadelphia},
  issn      = {1556-7249},
  doi       = {10.1080/15567249.2020.1843565},
  pages     = {55 -- 74},
  year      = {2021},
  abstract  = {Sustainable electricity systems need renewable and dispatchable energy sources. Solar energy is an abundant source of renewable energy globally which is, though, by nature only available during the day, and especially in clear weather conditions. We compare three technology configurations able to provide dispatchable solar power at times without sunshine: Photovoltaics (PV) combined with battery (BESS) or thermal energy storage (TES) and concentrating solar power (CSP) with TES. Modeling different periods without sunshine, we find that PV+BESS is competitive for shorter storage durations while CSP+TES gains economic advantages for longer storage periods (also over PV+TES). The corresponding tipping points lie at 2-3 hours (current cost), and 4-10 hours if expectations on future cost developments are taken into consideration. PV+TES becomes only more competitive than CSP+TES with immense additional cost reductions of PV. Hence, there remain distinct niches for two technologies: PV+BESS for short storage durations and CSP+TES for longer ones.},
  language  = {en}
}
@article{TroendleLilliestamMarellietal.2020,
  author    = {Tr{\"o}ndle, Tim and Lilliestam, Johan and Marelli, Stefano and Pfenninger, Stefan},
  title     = {Trade-offs between geographic scale, cost, and infrastructure requirements for fully renewable electricity in Europe},
  series = {Joule},
  volume    = {4},
  journal   = {Joule},
  number    = {9},
  publisher = {Cell Press},
  address   = {Cambridge , Mass.},
  issn      = {2542-4351},
  doi       = {10.1016/j.joule.2020.07.018},
  pages     = {1929 -- 1948},
  year      = {2020},
  abstract  = {The European potential for renewable electricity is sufficient to enable fully renewable supply on different scales, from self-sufficient, subnational regions to an interconnected continent. We not only show that a continental-scale system is the cheapest, but also that systems on the national scale and below are possible at cost penalties of 20\% or less. Transmission is key to low cost, but it is not necessary to vastly expand the transmission system. When electricity is transmitted only to balance fluctuations, the transmission grid size is comparable to today's, albeit with expanded cross-border capacities. The largest differences across scales concern land use and thus social acceptance: in the continental system, generation capacity is concentrated on the European periphery, where the best resources are. Regional systems, in contrast, have more dispersed generation. The key trade-off is therefore not between geographic scale and cost, but between scale and the spatial distribution of required generation and transmission infrastructure.},
  language  = {en}
}