Table 3.27 Gross/Net Generation by Energy Storage Technology: Total (All Sectors), 2010 - 2020
(Thousand Megawatthours)

  Generation at Utility Scale Facilities
Gross Generation Net Generation
Period Battery Compressed Air Flywheels Hydroelectric
Pumped
Storage
Total Battery Compressed Air Flywheels Hydroelectric
Pumped
Storage
Total
Annual Totals
2010 0 0 0 24,067 24,067 0 0 0 -5,501 -5,501
2011 0 0 0 22,828 22,828 0 0 0 -6,421 -6,421
2012 0 0 0 19,776 19,776 0 0 0 -4,950 -4,950
2013 9 0 25 19,257 19,290 -3 0 -8 -4,681 -4,692
2014 24 9 47 20,054 20,133 -14 -2 -21 -6,174 -6,210
2015 76 8 49 20,111 20,244 -20 -7 -24 -5,091 -5,142
2016 142 17 43 22,443 22,645 -170 -8 -22 -6,686 -6,886
2017 383 12 62 22,752 23,209 -69 -8 -26 -6,495 -6,597
2018 358 6 67 21,503 21,934 -88 -6 -28 -5,905 -6,026
2019 456 6 59 20,772 21,293 -97 -7 -26 -5,261 -5,391
2020 557 6 53 21,073 21,689 -131 -5 -24 -5,321 -5,482
Year 2018
January 27 1 5 1,666 1,698 -7 -0 -2 -547 -557
February 25 0 5 1,464 1,495 -7 -0 -2 -315 -324
March 28 0 5 1,346 1,380 -7 -0 -2 -490 -500
April 27 1 5 1,338 1,371 -7 -0 -2 -377 -387
May 29 1 6 1,874 1,910 -7 -0 -2 -390 -400
June 28 1 6 2,177 2,211 -7 -1 -2 -433 -444
July 33 1 6 2,630 2,670 -8 -1 -2 -644 -656
August 32 1 6 2,730 2,768 -8 -1 -2 -747 -758
September 32 1 5 2,000 2,038 -7 -1 -2 -603 -613
October 32 1 6 1,605 1,643 -8 -1 -2 -492 -503
November 33 0 6 1,356 1,395 -7 -0 -2 -343 -353
December 33 0 6 1,316 1,355 -8 -0 -2 -522 -532
Year 2019
January 35 0 5 1,574 1,615 -8 -1 -2 -323 -333
February 37 0 5 1,401 1,443 -8 -1 -2 -389 -399
March 44 1 4 1,409 1,457 -9 -1 -2 -409 -420
April 39 0 4 1,664 1,708 -8 -0 -2 -103 -114
May 41 1 5 2,003 2,049 -8 -1 -2 -368 -379
June 35 1 5 1,919 1,960 -8 -1 -2 -385 -396
July 37 1 5 2,558 2,601 -8 -1 -2 -622 -634
August 37 1 5 2,319 2,361 -8 -1 -2 -579 -590
September 42 1 5 2,029 2,076 -10 -1 -2 -671 -684
October 34 1 5 1,402 1,441 -6 -1 -2 -373 -381
November 37 0 5 1,176 1,219 -8 -1 -2 -509 -519
December 37 0 5 1,320 1,363 -9 -1 -2 -529 -542
Year 2020
January 41 0 4 1,530 1,575 -11 -0 -2 -377 -390
February 42 0 4 1,445 1,491 -10 -0 -2 -247 -259
March 50 0 4 1,347 1,402 -10 -0 -2 -353 -366
April 44 0 4 1,348 1,396 -9 -0 -2 -325 -337
May 43 0 4 1,839 1,887 -10 -0 -2 -367 -379
June 43 1 4 2,213 2,260 -9 -1 -2 -499 -511
July 45 1 5 2,718 2,769 -11 -1 -2 -686 -700
August 48 1 5 2,553 2,606 -12 -1 -2 -784 -799
September 50 1 4 1,919 1,973 -12 -0 -2 -525 -539
October 50 0 4 1,430 1,484 -10 -0 -2 -423 -435
November 52 0 4 1,263 1,320 -13 -0 -2 -369 -384
December 50 0 5 1,470 1,525 -13 -0 -2 -368 -383

See Glossary for definitions. Values are final. See Technical Notes for a discussion of the sample design for the Form EIA-923 and predecessor forms.
Totals may not equal sum of components because of independent rounding. NM=Not meaningful due to large standard error. W=Withheld to avoid disclosure of individual company data.
Displayed values of zero may represent small values that round to zero. The Excel version of this table provides additional precision which may be accessed by selecting individual cells.
Sources: U.S. Energy Information Administration, Form EIA-923, Power Plant Operations Report; U.S. Energy Information Administration, Form EIA-906, Power Plant Report; U.S. Energy Information Administration,
Form EIA-920 Combined Heat and Power Plant Report; and predecessor forms.
Beginning with 2008 data, the Form EIA-923, Power Plant Operations Report, replaced the following: Form EIA-906, Power Plant Report; Form EIA-920, Combined Heat and Power Plant Report;
Form EIA-423, Monthly Cost and Quality of Fuels for Electric Plants Report; and Federal Energy Regulatory Commission, FERC Form 423, Monthly Report of Cost and Quality of Fuels for Electric Plants.