IEA (2021), Generation by fuel type during the period of minimum net demand (1-2 Jan) in 2030 with 15% share of VRE with flexible power plants, IEA, Paris https://www.iea.org/data-and-statistics/charts/generation-by-fuel-type-during-the-period-of-minimum-net-demand-1-2-jan-in-2030-with-15-share-of-vre-with-flexible-power-plants, Licence: CC BY 4.0