Electrical Generation by Renewable Sources Exceeded EIA Forecasts in 2021

Driven by strong solar and wind power growth, electrical generation by renewable energy sources (also including biomass, geothermal, hydropower) accounted for 21.02 percent of total U.S. electrical generation in 2021, exceeding U.S. Energy Information Administration (EIA) forecasts, according to a SUN DAY Campaign analysis of newly-released EIA data. 

The latest issue of EIA’s “Electric Power Monthly” report (with data through December 31, 2021) also reveals that in 2021, solar (including distributed rooftop systems) increased by 25.23 percent, making it the nation’s fastest growing source of electricity last year. Wind grew 12.37 percent compared to 2020. Combined, solar and wind grew by 15.96 percent and accounted for more than one-eighth (13.05 percent) of U.S. electrical generation (wind – 9.12 percent, solar – 3.93 percent). Moreover, wind and solar combined now provide more than three-fifths (62.08 percent) of the generation by renewable sources.  

In addition, geothermal posted a gain of 2.19 percent while electricity generated by wood + other biomass increased by 1.42 percent. Taken together, generation by all non-hydro renewables grew by 14.08 percent. 

Reflecting severe drought conditions during the year, though, hydropower fell by 8.78 percent. That notwithstanding, all renewables combined – including hydropower – produced 6.17 percent more electricity than a year earlier. However, inasmuch as electricity generation by all sources increased by 2.86 percent, renewables’ share of the total increased only slightly – from 20.37 percent in 2020 to 21.02 percent in 2021. Nonetheless, that exceeded by more than 5 percent EIA’s forecast of a 20 percent share for renewables in 2021 as it regularly predicted in its monthly “Short-Term Energy Outlook” reports last year. 

Renewable sources also expanded their lead over nuclear power, providing one-eighth (12.50 percent) more electricity than the nation’s atomic power plants (18.69 percent of total U.S. generation). Natural gas remained as the top source of U.S. electrical generation with a 37.82 percent share but down from 40.12 percent a year ago. Coal rebounded into second place (with a 21.58 percent share), growing 16.20 percent compared to 2020. 

Longer-term trends, though, still suggest the gradual and probably accelerating displacement of coal and nuclear power by renewable energy sources, especially solar and wind. EIA expects 21.8 gigawatts (GW) of new utility-scale solar capacity to come online in 2022 along with 7.6-GW of new wind capacity and 4.4-GW of small-scale solar capacity. Hydropower also seems poised to rebound in 2022; it increased its output by 19.26 percent in December 2021 compared to December 2020. As a consequence, EIA now expects renewables’ share of U.S. electrical generation to top 22 percent this year and exceed that of coal while nuclear power’s share declines further. 

“2021 was a good year for solar and wind notwithstanding headwinds such as the Covid pandemic and disruptions in global supply chains,” noted the SUN DAY Campaign’s executive director Ken Bossong. “Together with other renewable energy sources, they built on their growing lead over nuclear power, will likely overtake coal in 2022, and continue to cut into natural gas’s current dominance.”  

NOTE: Unless otherwise indicated, the electricity figures cited above include EIA’s “estimated small-scale solar photovoltaic” (rooftop solar systems) which accounts for 29.95 percent of total solar output and almost six percent (5.60 percent) of total net electrical generation by renewable energy sources.   


The latest issue of EIA’s “Electric Power Monthly” was posted late on February 25, 2022.
For the data cited in this news update, see the tables:  



The latest issue of EIA’s “Short-Term Energy Outlook” was posted on February 8, 2022. 

For the data cited in this news update, see the “Electricity” forecast. 

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