Renewables providing 2,500 MW of new US electrical generating capacity per month 

According to a review by the Sun Day Campaign of data recently released by the Federal Energy Regulatory Commission (FERC) and the US Energy Information Administration (EIA), solar, wind, and other renewable energy sources (i.e., biomass, geothermal, hydropower) are now adding more than 2,250 megawatts (MW) of new generating capacity each month.
Renewables providing 2,500 MW of new US electrical generating capacity per month 

For perspective, that is more than the planned generating capacity (2,200-MW) of the two reactors at the Vogtle nuclear plant in Georgia that have been under construction since 2013 and for which there is still no certain completion date.

According to the latest issue of FERC's “Energy Infrastructure Update” (with data through October 31, 2021), utility-scale (i.e., >1-MW)  renewable facilities added 18,255-MW of new generating capacity during the first ten months of 2021 or an average of 1,826-MW per month. Separately, in its latest "Short-Term Energy Outlook," EIA forecasts that small-scale (i.e.,

Solar and wind dominated new US electrical generating capacity additions during the first ten months of 2021 adding 9,604-MW and 8,580-MW respectively. Including new hydropower (28-MW), geothermal (25-MW), and biomass (18-MW), renewables provided 83.6 percent of all new generating capacity through the end of October. New renewable capacity was more than five times greater than that of natural gas (3,549-MW). There was no new nuclear capacity added in 2021 while new oil and coal capacity increased by just 19-MW and 11-MW respectively.

Renewables now provide more than a quarter (25.47 percent) of total US available installed generating capacity - a share significantly greater than that of coal (18.77 percent) and more than three times that of nuclear power (8.32 percent). [2] By comparison, a year ago, renewables' share was only 23.31 percent. Five years ago, it was 18.58 percent and a decade earlier it was 14.12 percent. 

That growth is almost entirely attributable to a nearly three-fold increase in wind's share of installed generating capacity and a 35-fold increase in solar's share. Wind is now more than a tenth (10.54 percent) of the nation's generating capacity (up from 3.80 percent in October 2011) while utility-scale solar has surpassed five percent (5.21 percent) - up from 0.15 percent in October 2011 ... and that does not include small-scale distributed solar. [3]

Moreover, during the first ten months of 2021, solar and wind have each set new records for capacity additions. The 9,604-MW of new solar thus far reported by FERC for the first ten months of 2021 dwarfs the 6,516-MW added during the same time period in 2020 or the 3,758-MW added in 2019. Likewise, the 8,580-MW of new wind capacity significantly exceeds the 7,161-MW reported for 2020 or the 4,721-MW added in 2019. 

The increase in solar and wind capacity is manifesting itself in ever-higher levels of electrical generation by those sources. According to the latest issue of EIA's “Electric Power Monthly” report (with data through October 31, 2021), utility-scale solar and wind generation during the first ten month of 2021 increased by 27.9 percent and 11.1 percent respectively compared to the same period in 2020. Wind now accounts for 8.64 percent of US electrical production while solar - including small-scale - is providing 4.08 percent.

In addition, FERC data suggest that the share of generating capacity from solar and wind is on track to increase significantly over the next three years (i.e., by October 2024). FERC notes that there may be as much as 170,941-MW of new solar capacity in the pipeline with 52,692-MW classified as “high probability additions” offset by only 92-MW of projected “retirements”. Just a year ago, FERC reported 128,001-MW of solar in the three-year pipeline with 32,784-MW classified as “high probability”. In addition, new wind capacity by October 2024 could total 71,929-MW with 23,180-MW being "high probability" and only 150-MW of retirements expected.

“High probability” generation capacity additions for utility-scale solar and wind combined, minus anticipated retirements, reflect a projected net increase of 75,630-MW, or over 2,100-MW per month. Again, that figure does not include new distributed, small-scale solar capacity or additions by hydropower, geothermal, and biomass. By comparison, net growth for natural gas will be only 14,327-MW. Thus, solar and wind together are forecast to provide more than five times as much new net generating capacity as natural gas over the next three years ... not to mention over 50 times as much net new capacity as nuclear power (just 1,377-MW). 

If just FERC's latest “high probability” projections materialise, by October 2024, renewable energy sources should provide over 30 percent (30.13 percent) of US total available installed generating capacity with utility-scale solar and wind accounting for 9.00 percent and 11.81 percent respectively, or more than 20 percent combined. 

“The breath-taking pace at which solar and wind are adding new capacity explains why renewable sources combined have eclipsed the generating capacity of nuclear power and surpassed that of coal as well as whittled down the lead of natural gas” said Ken Bossong, Executive Director of the Sun Day Campaign. “Conservatively, over the next three years, renewables should expand from about a quarter of the nation's generating capacity today to at least thirty percent and probably more.”

For additional information:

US Energy Information Administration (EIA)

Federal Energy Regulatory Commission (FERC)

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