kWh Index

How often the power goes out, by utility

Minutes a year the average customer spent without power, including major event days, as reported to EIA. Nobody publishes this per utility, and it is the honest front half of the question “do I need a battery”.

Fewest minutes off supply

UtilityStateMinutes/year
City Of Corona - (Ca)CA0.0
Nashville Electric ServiceTN0.0
Slinger UtilitiesWI0.3
City Of Marshall - (Mn)MN0.7
Black Hills Power, Inc.WY2.2
Hartford ElectricWI2.3
Town Of Braintree - (Ma)MA2.5
Alcorn County Elec Power AssnMS2.5
Cedar Falls UtilitiesIA3.2
Watertown Municipal UtilitiesSD3.3
Pointe Coupee Elec Member CorpLA3.5
City Of Alexandria - (Mn)MN4.0
City Of Richland Center - (Wi)WI4.0
City Of Menasha - (Wi)WI4.1
Northeast Louisiana Power Coop Inc.LA4.1
Meriwether Lewis Electric CoopTN4.3
City Of Zeeland - (Mi)MI5.0
Town Of North Attleborough - (Ma)MA5.9
Oconomowoc UtilitiesWI6.0
Town Of Wellesley - (Ma)MA8.0
City Of Austin - (Mn)MN8.3
Shakopee Public Utilities CommMN8.3
Fall River Rural Elec Coop Inc.ID8.6
Macon Electric CoopMO8.8
Virginia Tech Electric ServiceVA9.1
City Of Moorhead - (Mn)MN9.2
City Of Jasper - (In)IN9.2
City Of Garland - (Tx)TX9.2
City Of Greenfield - (In)IN9.8
Easton Utilities CommMD10.5
City Of Worthington - (Mn)MN10.5
City Of Boulder City - (Nv)NV10.5
City Of Chicopee - (Ma)MA10.5
City Of Brookings - (Sd)SD10.6
City Of Independence - (Ia)IA10.7
City Of Fort Collins - (Co)CO11.1
City Of Forest GroveOR11.1
City Of Coffeyville - (Ks)KS11.7
City Of Grand Island - (Ne)NE12.2
Jamestown Board Of Public UtilNY12.3
Waupun UtilitiesWI12.8
City Of River FallsWI13.1
City Of Sturgis - (Mi)MI13.9
City Of Siloam Springs - (Ar)AR14.3
City Of Harrisonburg - (Va)VA15.6
Town Of Mansfield - (Ma)MA15.7
Fall River Rural Elec Coop Inc.MT16.5
Town Of Shrewsbury - (Ma)MA16.6
City Of Lodi - (Ca)CA16.6
Town Of Massena - (Ny)NY17.4
Rock Energy CooperativeIL17.6
City Of Paducah - (Ky)KY17.8
City Of Fremont - (Ne)NE17.8
City Of FountainCO18.0
Town Of DanversMA18.0
Borough Of ChambersburgPA18.0
Town Of Middleborough - (Ma)MA19.1
City Of LongmontCO19.3
City Of Traverse City - (Mi)MI19.4
Henderson City Utility CommKY19.6

Most minutes off supply

UtilityStateMinutes/year
Altamaha Electric Member CorpGA17,313.0
Jefferson Electric Member CorpGA10,318.0
Haywood Electric Member CorpNC9,611.7
Tri-County Electric Coop, Inc. (Fl)FL8,347.3
Laurens Electric Coop, Inc.SC8,310.0
Aiken Electric Coop Inc.SC7,941.1
Newberry Electric Coop, Inc.SC7,940.3
Duke Energy Carolinas, LLCSC7,803.7
Excelsior Electric Member CorpGA7,422.5
Suwannee Valley Elec Coop Inc.FL7,274.8
Washington Elec Member CorpGA6,929.9
Broad River Electric Coop, Inc.SC6,145.8
Blue Ridge Elec Member Corp - (Nc)NC6,038.5
Pennyrile Rural Electric CoopKY5,964.1
Lane Electric Coop Inc.OR5,578.3
Rutherford Elec Member CorpNC5,532.4
Blue Ridge Electric Coop Inc. - (Sc)SC5,291.4
Sam Houston Electric Coop Inc.TX4,584.0
Central Florida Elec Coop, Inc.FL4,439.9
Tampa Electric CoFL4,239.7
South Louisiana Elec Coop AssnLA4,157.0
Mid-Carolina Electric Coop Inc.SC3,915.3
Rusk County Electric Coop, Inc.TX3,860.5
Coastal Electric Member Corp - (Ga)GA3,698.1
Southwest Mississippi E P AMS3,672.1
Rayle Electric Membership CorpGA3,490.3
Deep East Texas Elec Coop Inc.TX3,296.6
Beauregard Electric Coop, Inc.LA3,033.6
Buckeye Rural Elec Coop, Inc.OH2,912.7
New Smyrna Beach City OfFL2,858.0

Utilities with at least 1,000 residential customers that filed a figure. 227 of 972 utilities suppress theirs, and those are absent here rather than shown as zero.

Home batteries by usable capacity — what it takes to cover an outage of that length.

Get told when this changes

A note each month when new EIA data lands, including the annual reliability release.

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Source: EIA-861 annual electric utility survey. Public domain. Not an endorsement of any utility.