Scaling green hydrogen is dependent on access to cost-competitive zero-carbon electricity. The average amount of renewable energy required in 2050 in the 1.5°C scenarios is 155 EJ in 2050, seven times current generation levels (1.5°C scenarios include: IEA Net Zero, IRENA WETO, DNV PNZ, and BNEF NEO Green). Assumptions about the total amount of green hydrogen needed in 2050 vary widely. Green hydrogen could dramatically inflate the amount of renewable energy needed, with green hydrogen alone requiring between 50% and 200% as much energy as 2020 total annual electricity consumption.
Energy from Renewable Sources to Power Electrolyzers (EJ)