Connecticut Electricity Rates, Providers & Generation
In Connecticut, the average residential electricity rate is 29.39¢ per kilowatt-hour, ranking 47th nationally; the typical home spends $207 per month on electricity; 2% of generation comes from renewable sources.
Connecticut electricity overview
Production, consumption, and emissions for Connecticut based on the most recent reported year (2025).
- Population
- 3,688,496
- Total production
- 105.2 TWh 28.53 MWh per capita
- Total consumption
- 27.6 TWh 7.47 MWh per capita
- Production from renewables
- 2.3 TWh 2.2% of generation
- Production from non-renewables
- 103.0 TWh
Connecticut electricity rates & bills
Average residential electricity rate in Connecticut, last 22 months.
| Sector | Avg rate (¢/kWh) |
|---|---|
| Residential | 29.39¢ |
| Commercial | 23.10¢ |
| Industrial | 18.31¢ |
How Connecticut generates electricity
Generation mix from in-state power plants over the most recent twelve months, by fuel category.
- Renewable
- Nuclear
- Fossil
- Other
| Fuel | Share | Generation |
|---|---|---|
| fossil fuels | 23.4% | 25.2 TWh |
| natural gas & other gases | 22.6% | 24.3 TWh |
| natural gas | 22.6% | 24.3 TWh |
| nuclear | 15.6% | 16.7 TWh |
| estimated total solar photovoltaic | 2.4% | 2.6 TWh |
| estimated total solar | 2.4% | 2.6 TWh |
| estimated small scale solar photovoltaic | 1.7% | 1.8 TWh |
| renewable | 1.6% | 1.7 TWh |
| all renewables | 1.3% | 1.4 TWh |
| petroleum liquids | 0.8% | 821.6 GWh |
| petroleum | 0.8% | 821.6 GWh |
| solar | 0.7% | 774.0 GWh |
| solar photovoltaic | 0.7% | 774.0 GWh |
| distillate fuel oil | 0.6% | 637.7 GWh |
| biomass | 0.6% | 595.0 GWh |
| other | 0.4% | 438.6 GWh |
| renewable waste products | 0.3% | 364.1 GWh |
| municiapl landfill gas | 0.3% | 363.1 GWh |
| biomass | 0.3% | 359.9 GWh |
| biogenic municipal solid waste | 0.3% | 358.8 GWh |
| conventional hydroelectric | 0.3% | 336.5 GWh |
| wood and wood wastes | 0.2% | 218.9 GWh |
Connecticut production fuel makeup
Share of in-state generation by fuel over the latest twelve months.
- fossil fuels23.4%
- natural gas & other gases22.6%
- natural gas22.6%
- nuclear15.6%
- estimated total solar photovoltaic2.4%
- estimated total solar2.4%
- estimated small scale solar photovoltaic1.7%
- renewable1.6%
- all renewables1.3%
- petroleum liquids0.8%
- petroleum0.8%
- solar0.7%
- solar photovoltaic0.7%
- distillate fuel oil0.6%
- biomass0.6%
- other0.4%
- renewable waste products0.3%
- municiapl landfill gas0.3%
- biomass0.3%
- biogenic municipal solid waste0.3%
- conventional hydroelectric0.3%
- wood and wood wastes0.2%
Electric utilities in Connecticut
The 2 electric distribution utilities that serve Connecticut, by customers served. These are the companies that deliver power and handle outages.
| Utility | Parent company | Customers served | Outage map |
|---|---|---|---|
| Eversource Energy (CT/MA/NH) | Eversource Energy | 3,328,641 | Outage map |
| EverBright, LLC | — | 63,164 | Outage map |
Residential electricity providers in Connecticut
13 utilities and retail providers serving residential customers, ordered by customer count. Connecticut has a deregulated retail electricity market — most residential customers can choose among competing providers.
| Provider | Type | Customers | Annual sales | Avg rate | Avg bill |
|---|---|---|---|---|---|
| Connecticut Light & Power Co | Investor-owned | 250,288 | 2.6 TWh | 16.26¢ | — |
| United Illuminating Co | Investor-owned | 55,989 | 432.8 GWh | 19.59¢ | — |
| Town of Wallingford - (CT) | Municipal | 21,405 | 212.8 GWh | 15.65¢ | — |
| Sunnova | Behind-the-meter | 20,437 | 172.4 GWh | 21.24¢ | — |
| City of Norwich - (CT) | Municipal | 18,870 | 139.4 GWh | 22.78¢ | — |
| Sunrun Inc. | Behind-the-meter | 17,293 | 132.4 GWh | 24.36¢ | — |
| Groton Dept of Utilities - (CT) | Municipal | 12,284 | 105.4 GWh | 18.70¢ | — |
| Tesla Inc. | Behind-the-meter | 8,450 | 48.2 GWh | 17.11¢ | — |
| SunPower Capital, LLC | Behind-the-meter | 3,506 | 37.5 GWh | 18.03¢ | — |
| Bozrah Light & Power Company | Municipal | 2,434 | 24.3 GWh | 19.33¢ | — |
| Spruce Finance | Behind-the-meter | 1,848 | 14.0 GWh | 16.33¢ | — |
| EverBright, LLC | Behind-the-meter | 489 | 4.0 GWh | 17.81¢ | — |
| Palmetto Solar, LLC | Behind-the-meter | 46 | 813 MWh | 28.09¢ | — |
Commercial electricity providers in Connecticut
11 providers serving commercial customers, ordered by annual sales.
| Provider | Type | Customers | Annual sales | Avg rate | Avg bill |
|---|---|---|---|---|---|
| Connecticut Light & Power Co | Investor-owned | 41,100 | 6.6 TWh | 11.14¢ | — |
| United Illuminating Co | Investor-owned | 15,801 | 1.8 TWh | 11.61¢ | — |
| Town of Wallingford - (CT) | Municipal | 3,670 | 216.8 GWh | 12.82¢ | — |
| City of Norwich - (CT) | Municipal | 2,014 | 127.3 GWh | 20.31¢ | — |
| Groton Dept of Utilities - (CT) | Municipal | 1,588 | 94.5 GWh | 17.98¢ | — |
| Greenskies Renewable Energy, LLC | Behind-the-meter | 29 | 65.8 GWh | 6.29¢ | — |
| Tesla Inc. | Behind-the-meter | 848 | 14.8 GWh | 10.23¢ | — |
| Bozrah Light & Power Company | Municipal | 381 | 8.2 GWh | 20.88¢ | — |
| TerraForm US Energy Services, LLC | Behind-the-meter | 6 | 1.3 GWh | 13.52¢ | — |
| Greenbacker Renewable Energy Corporation | Behind-the-meter | 3 | 676 MWh | 23.82¢ | — |
| Constellation Solar Holding, LLC | Behind-the-meter | 1 | 436 MWh | 12.00¢ | — |
Power plant map of Connecticut
156 power plants in Connecticut with known coordinates, plotted by location. Marker size reflects nameplate capacity; color shows primary fuel.
- Renewable
- Nuclear
- Fossil
- Other
Power plants in Connecticut
Largest in-state electricity generators by annual net generation, with associated CO2 emissions where available.
| Plant | County | Fuel | Capacity | Generation | CO₂ | CO₂/MWh |
|---|---|---|---|---|---|---|
| Millstone | — | NUC | 2.3 GW | 13.7 TWh | — | — |
| Lake Road Generating Plant | — | NG | 840 MW | 5.8 TWh | 2.2 M tonnes | 375 kg |
| CPV Towantic Energy Center | — | NG | 842 MW | 5.5 TWh | 1.9 M tonnes | 350 kg |
| Milford Power Project | — | NG | 578 MW | 3.6 TWh | 1.4 M tonnes | 401 kg |
| Bridgeport Station | — | NG | 576 MW | 2.9 TWh | 1.1 M tonnes | 362 kg |
| Kleen Energy Systems Project | — | NG | 693 MW | 2.7 TWh | 1.0 M tonnes | 374 kg |
| Bridgeport Energy Project | — | NG | 520 MW | 2.6 TWh | 1.0 M tonnes | 393 kg |
| Wheelabrator Bridgeport | — | MSW | 67 MW | 462.8 GWh | 389.6 k tonnes | 842 kg |
| Plainfield Renewable Energy LLC | — | WDS | 43 MW | 233.8 GWh | 147.4 tonnes | 1 kg |
| Kimberly Clark-Unit 1,2,3 | — | NG | 36 MW | 217.4 GWh | 61.2 k tonnes | 282 kg |
| Middletown | — | RFO | 786 MW | 173.3 GWh | 120.6 k tonnes | 696 kg |
| Shepaug | — | WAT | 37 MW | 163.1 GWh | — | — |
| Wallingford Energy | — | NG | 350 MW | 161.3 GWh | 90.8 k tonnes | 563 kg |
| Rand Whitney CHP Plant | — | NG | 17 MW | 123.7 GWh | 33.7 k tonnes | 272 kg |
| UCONN Cogen Facility | — | NG | 26 MW | 122.1 GWh | 37.7 k tonnes | 309 kg |
| Pratt & Whitney | — | NG | 26 MW | 120.3 GWh | 34.7 k tonnes | 289 kg |
| Algonquin Windsor Locks | — | NG | 71 MW | 115.8 GWh | 1.9 k tonnes | 17 kg |
| Covanta Southeastern Connecticut Company | — | MSW | 18 MW | 114.2 GWh | 126.3 k tonnes | 1,105 kg |
| Stevenson | — | WAT | 31 MW | 111.2 GWh | — | — |
| Bridgeport Fuel Cell, LLC | — | NG | 17 MW | 105.1 GWh | — | — |
| Covanta Bristol Energy | — | MSW | 16 MW | 103.7 GWh | 99.2 k tonnes | 957 kg |
| Wheelabrator Lisbon | — | MSW | 15 MW | 101.9 GWh | 99.9 k tonnes | 981 kg |
| Generate Colchester Fuel Cells, LLC | — | NG | 10 MW | 82.3 GWh | — | — |
| Quinebaug Solar | — | SUN | 49 MW | 76.2 GWh | — | — |
| Pfizer Groton Plant | — | NG | 38 MW | 72.8 GWh | 20.9 k tonnes | 288 kg |
| Sikorsky Aircraft CHP | — | NG | 10 MW | 64.3 GWh | 32.5 k tonnes | 505 kg |
| Falls Village | — | WAT | 9 MW | 52.1 GWh | — | — |
| Hartford Hospital Cogeneration | — | NG | 12 MW | 43.8 GWh | 11.6 k tonnes | 265 kg |
| Pfizer Groton Fuel Cell | — | NG | 6 MW | 42.1 GWh | — | — |
| Bulls Bridge | — | WAT | 7 MW | 41.8 GWh | — | — |
| DWW Solar ll | — | SUN | 37 MW | 41.1 GWh | — | — |
| Waterbury Generation | — | NG | 96 MW | 40.1 GWh | 21.3 k tonnes | 532 kg |
| South Windsor Fuel Cell | — | NG | 5 MW | 39.2 GWh | — | — |
| Fusion Solar Center LLC | — | SUN | 20 MW | 38.8 GWh | — | — |
| Montville Station | — | RFO | 495 MW | 36.2 GWh | 30.7 k tonnes | 849 kg |
| Rainbow (CT) | — | WAT | 8 MW | 35.3 GWh | — | — |
| Subase Microgrid Project | — | NG | 7 MW | 34.2 GWh | — | — |
| Naval Sub Base New London Fuel Cell | — | NG | 7 MW | 34.2 GWh | — | — |
| Nutmeg Solar | — | SUN | 20 MW | 33.4 GWh | — | — |
| North Stonington Solar Center, LLC | — | SUN | 15 MW | 30.9 GWh | — | — |
| Woods Hill Solar | — | SUN | 20 MW | 27.5 GWh | — | — |
| HSCo CHP | — | NG | 4 MW | 26.6 GWh | 7.5 k tonnes | 282 kg |
| Danbury Hospital Cogen Plant | — | NG | 4 MW | 26.3 GWh | 7.4 k tonnes | 282 kg |
| Fairfield University CHP Plant | — | NG | 5 MW | 25.3 GWh | 8.6 k tonnes | 339 kg |
| Frito Lay Incorporated | — | NG | 5 MW | 22.3 GWh | 18.6 k tonnes | 835 kg |
| Wallingford Solar | — | SUN | 16 MW | 21.7 GWh | — | — |
| UDR Glastonbury Fuel Cell | — | NG | 3 MW | 21.1 GWh | — | — |
| New Haven Harbor | — | RFO | 642 MW | 21.1 GWh | 27.6 k tonnes | 1,309 kg |
| UI RCP New Haven Fuel Cell | — | NG | 3 MW | 20.6 GWh | — | — |
| UI RCP Bridgeport Seaside | — | NG | 5 MW | 20.0 GWh | — | — |
There is 1 nuclear power plant in Connecticut
| Plant | County | Fuel | Capacity | Generation | CO₂ | CO₂/MWh |
|---|---|---|---|---|---|---|
| Millstone | — | NUC | 2.3 GW | 13.7 TWh | — | — |
Data centers & crypto mining in Connecticut
Data centers and cryptocurrency-mining operations are large electricity consumers that show up inside Connecticut's commercial and industrial load. EIA does not publish a facility-level data-center inventory, so the figures below pair reported commercial and industrial sales with EIA estimates of data-center and crypto-mining electricity demand.
No state-level EIA estimate of cryptocurrency-mining load is available for Connecticut; mining is concentrated in a handful of states.
Quick facts about electricity in Connecticut
- The average residential electricity rate in Connecticut is 29.39¢ per kWh, the 47th lowest among the 50 states and DC.
- The typical residential electricity bill in Connecticut is $207 per month.
- Connecticut's largest source of in-state generation is fossil fuels, at 23.4% of the mix.
- Renewable sources account for 2.2% of the electricity generated in Connecticut.
- Connecticut generated 105.2 TWh of electricity in the most recent reported year.
Frequently asked questions
What is the average electricity rate in Connecticut?
The average residential electricity rate in Connecticut was 29.39¢ per kilowatt-hour as of 2025, according to U.S. Energy Information Administration data, ranking 47th among the 50 states and DC.
What is the average electricity bill in Connecticut?
The average monthly residential electricity bill in Connecticut was $207 in 2025. This figure is calculated from total annual residential revenue divided by average customer count over twelve months, using EIA Form 861 data.
Can I choose my electricity provider in Connecticut?
Yes. Most residential customers can choose their electricity provider.
What share of Connecticut's electricity comes from renewable sources?
In 2025, 2.2% of electricity generated in Connecticut came from renewable sources (wind, solar, hydroelectric, geothermal, and biomass), based on EIA Form 923 data.
How much electricity do data centers use in Connecticut?
Data centers in Connecticut are estimated to use about 1.4 TWh of electricity per year, roughly 4.9% of the state's electricity sales. EIA does not publish facility-level data-center data; this is an estimate that apportions national EIA/DOE data-center figures by Connecticut's share of U.S. commercial electricity sales.