The International Energy Agency (IEA) estimates that global electricity generation nearly doubles during the next three decades in the APC, rising from about 26 800 terawatthours (TWh) in 2020 to over 50 000 TWh in 2050, some 4 000 TWh higher than in the STEPS.
Low-emissions energy sources provide all the increase.
The share of renewables in electricity generation rises from 29% in 2020 to
nearly 70% in 2050, compared with about 55% in the STEPS, as solar PV and wind race ahead of all other sources of generation.
By 2050, solar #PV and #wind together account for almost half of #electricity supply. Hydropower also continues to expand, emerging as the third‐largest energy source in the electricity mix by 2050.
Nuclear power increases steadily too, maintaining its global market share of about 10%, led by increases in China.
Natural gas use in electricity increases slightly to the mid‐2020s before starting to fall back, while coal’s share of electricity generation falls from around 35% in 2020 to below 10% in 2050. At that point, 20% of the remaining coalfired output comes from plants equipped with CCUS.
Hydrogen and ammonia start to emerge as fuel inputs to electricity generation by around 2030, used largely in combination with natural gas in gas turbines and with coal in coalfired power plants.
This extends the life of existing assets, contributes to electricity system adequacy and reduces the overall costs of transforming the electricity sectors in many countries.
Total battery capacity also rises substantially, reaching 1 600 gigawatts (GW) in 2050, 70% more than in the STEPS.
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