Impact Assessment of REDII Delegated Act on Electrolytic Hydrogen CO Intensity Technical Annex: Countries Data Deep Dive

The carbon intensity of electrolytic hydrogen can be calculated using the carbon intensity of the electricity and the efficiency of the electrolyser used. [...] The possibility of producing actual green hydrogen on the Austrian grid is very limited, however, in 2020 roughly 80% of the time the hydrogen produced on the grid would have been cleaner than grey hydrogen. [...] The most carbon intense hour on which hydrogen could have been produced on the grid and labelled as green would have been at 7 pm on the 18th of March, with a carbon intensity of the grid 222 gCO2/kWh, hence producing hydrogen with an associated carbon footprint of 10.6 tCO2/tH2. [...] The most carbon intensive hour at which green-labelled hydrogen could have been produced on the Danish grid would have been the 5th of February at 8 am, when the carbon intensity was 309 gCO2/kWh in the West Denmark, while in East Denmark it would have been the 27th of February at 1 am, with a carbon intensity of 336 gCO2/kWh. [...] The table below shows the associated carbon footprint of the hydrogen produced during the most carbon intensive hour permissible had the System- Level Matching rule been applied in the six Italian bidding zones in 2020.