Connecticut Electricity Rates, Providers & Generation
In Connecticut, the average residential electricity rate is 29.48¢ per kilowatt-hour, ranking 46th nationally; the typical home spends $244 per month on electricity; 2% of generation comes from renewable sources.
Rate trend
Average residential electricity rate in Connecticut, last 22 months.
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 |
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¢ | — |
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 | — | — |
Frequently asked questions
What is the average electricity rate in Connecticut?
The average residential electricity rate in Connecticut was 29.48¢ per kilowatt-hour as of 2026, according to U.S. Energy Information Administration data, ranking 46th among the 50 states and DC.
What is the average electricity bill in Connecticut?
The average monthly residential electricity bill in Connecticut was $244 in 2026. 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 2026, 1.8% of electricity generated in Connecticut came from renewable sources (wind, solar, hydroelectric, geothermal, and biomass), based on EIA Form 923 data.
About this data
All numbers on this page come from public datasets published by the U.S. Energy Information Administration, the U.S. Environmental Protection Agency's eGRID program, and the U.S. Census Bureau. Rate and bill figures are from EIA Form 861 (annual) and Form EIA-861-M (monthly). Generation data is from EIA Form 923. Plant inventory and retirement schedules come from EIA Form 860. Emissions are from EPA eGRID, the most recent published edition.
Data is refreshed weekly. EIA typically publishes annual data with a 10-month lag — for example, full-year 2026 data became available in late 2027.