State
Connecticut
Who serves its customers, 2025
| Kind of utility | Customers | Share of customers |
|---|---|---|
| Investor owned | 1,350,029 | 77.5% |
| Public (municipal, state, federal, and districts) | 63,148 | 3.6% |
| Retail power marketer | 290,637 | 16.7% |
| Other | 38,117 | 2.2% |
Customers of full-service and energy-only providers, as EIA counts them; delivery-only customers are the same people, so they are not counted twice.
U.S. Energy Information Administration · Annual Electric Power Industry Report (Form EIA-861) · data for 2025 · as of Oct 7, 2026 · retrieved Oct 31, 2026 · CC-BY-4.0 May be out of date. The next release was due by Oct 7, 2027. Last checked for an update: Oct 31, 2026.
Average price by sector, 2025
| Sector | Average price (cents per kWh) |
|---|---|
| Residential | 29.31 |
| Commercial | 22.92 |
| Industrial | 18.43 |
Revenue from every kind of service over sales counted once, as EIA computes its state averages.
Capacity and generation by fuel
| Fuel | Capacity | Net generation in 2025 |
|---|---|---|
| Natural gas | 5,388.4 MW | 24,712,280 MWh |
| Nuclear | 2,259.9 MW | 16,708,717 MWh |
| Residual fuel oil | 1,289.8 MW | 202,473 MWh |
| KER | 1,068.5 MW | 21,306 MWh |
| Solar | 492.7 MW | 669,732 MWh |
| Distillate fuel oil | 155.1 MW | 110,333 MWh |
| Hydro | 149.3 MW | 292,725 MWh |
| MSW | 116.2 MW | |
| Wood | 43 MW | 243,344 MWh |
| JF | 18.5 MW | 0 MWh |
| Wind | 5 MW | 12,250 MWh |
| Landfill gas | 1.6 MW | 3,954 MWh |
| Batteries | 1.6 MW | -86 MWh |
| Petroleum coke | 0 MWh | |
| MSB | 357,526 MWh | |
| MSN | 436,978 MWh | |
| PG | 0 MWh | |
| OBL | 1,735 MWh | |
| Bituminous coal | 0 MWh |
Balancing authorities serving it: ISNE.
U.S. Energy Information Administration · Annual Electric Generator Report (Form EIA-860) · data for 2025 · as of Sep 10, 2026 · retrieved Oct 31, 2026 · CC-BY-4.0 May be out of date. The next release was due by Sep 10, 2027. Last checked for an update: Oct 31, 2026.
U.S. Energy Information Administration · Power Plant Operations Report (Form EIA-923) · data for 2025 · as of Sep 11, 2026 · retrieved Oct 31, 2026 · CC-BY-4.0 May be out of date. The next release was due by Sep 11, 2027. Last checked for an update: Oct 31, 2026.
Interconnection queue, as of the end of 2025
| Type | Active capacity (MW) | Projects |
|---|---|---|
| Solar | 331 | 5 |
| Storage | 347 | 2 |
Requests still active in an interconnection queue at the end of 2025. Most never get built. Credit: Lawrence Berkeley National Laboratory and GridTracker.
Lawrence Berkeley National Laboratory and GridTracker · Queued Up: Interconnection Queue Data File (Lawrence Berkeley National Laboratory) · data for 2025 · as of May 7, 2026 · retrieved Oct 31, 2026 · CC-BY-4.0 May be out of date. The next release was due by May 7, 2027. Last checked for an update: Oct 31, 2026.
Utilities
| Utility | Ownership, as EIA reports it | Customers | Sales (MWh) |
|---|---|---|---|
| Connecticut Light & Power Co | Investor Owned | 1,309,946 | 20,350,866 |
| United Illuminating Co | Investor Owned | 348,263 | 4,875,249 |
| Constellation NewEnergy, Inc | Retail Power Marketer | 134,309 | 5,056,854 |
| Town Square Energy | Retail Power Marketer | 52,240 | 596,165 |
| Direct Energy Services | Retail Power Marketer | 41,703 | 412,833 |
| Think Energy, LLC | Retail Power Marketer | 30,472 | 335,282 |
| Town of Wallingford - (CT) | Municipal | 25,123 | 542,838 |
| City of Norwich - (CT) | Municipal | 20,996 | 287,145 |
| Sunrun Inc. | Behind the Meter | 19,341 | 134,332 |
| Groton Dept of Utilities - (CT) | Municipal | 14,193 | 407,739 |
| XOOM Energy Connecticut, LLC | Retail Power Marketer | 10,627 | 126,545 |
| Tesla Inc. | Behind the Meter | 9,239 | 67,215 |
| Major Energy Electric Services | Retail Power Marketer | 6,915 | 77,247 |
| First Point Power, LLC | Retail Power Marketer | 4,537 | 349,008 |
| SunPower Capital, LLC | Behind the Meter | 3,658 | 37,400 |
| North American Power and Gas, LLC | Retail Power Marketer | 3,305 | 25,942 |
| Bozrah Light & Power Company | Municipal | 2,836 | 205,440 |
| Palmetto Solar, LLC | Behind the Meter | 1,864 | 14,842 |
| Spruce Finance | Behind the Meter | 1,841 | 13,576 |
| Direct Energy Business | Retail Power Marketer | 1,753 | 1,244,822 |
| NextEra Energy Services, LLC | Retail Power Marketer | 1,641 | 454,571 |
| ENGIE Resources LLC | Retail Power Marketer | 1,372 | 1,283,242 |
| EverBright, LLC | Behind the Meter | 1,352 | 8,875 |
| Eligo Energy, LLC | Retail Power Marketer | 810 | 16,576 |
| Adjustment 2025 | 777 | 1,170,525 | |
| BP Energy Retail LLC | Retail Power Marketer | 229 | 1,089,446 |
| SmartestEnergy US LLC | Retail Power Marketer | 219 | 210,330 |
| Reliant Energy Northeast LLC | Retail Power Marketer | 165 | 12,009 |
| MP2 Energy LLC | Retail Power Marketer | 140 | 287,793 |
| Energy Plus Holdings LLC | Retail Power Marketer | 57 | 867 |
| Champion Energy Services | Retail Power Marketer | 50 | 73,514 |
| Texas Retail Energy, LLC | Retail Power Marketer | 47 | 48,284 |
| Greenskies Renewable Energy, LLC | Behind the Meter | 38 | 65,647 |
| Calpine Energy Solutions, LLC | Retail Power Marketer | 36 | 804,286 |
| Grid Power Direct, LLC | Retail Power Marketer | 10 | 2,642 |
| TerraForm US Energy Services, LLC | Behind the Meter | 6 | 1,264 |
| Constellation Solar Holding, LLC | Behind the Meter | 1 | 354 |
| Farmington River Power Company | Investor Owned | 1 | 21,116 |
| Sunnova | Behind the Meter | 0 | 0 |
A utility with too few reported figures for its own page is listed here with what it reported.
Power plants (193)
| Plant | County | Nameplate capacity | Operator |
|---|---|---|---|
| Millstone | New London | 2,259.9 MW | Dominion Energy Nuclear Conn Inc |
| CPV Towantic Energy Center | New Haven | 841.5 MW | CPV Towantic, LLC |
| Lake Road Generating Plant | Windham | 840 MW | Lake Road Generating Co LP |
| Middletown | Middlesex | 786.4 MW | Middletown Power LLC |
| Kleen Energy Systems | Middlesex | 693 MW | Kleen Energy Systems, LLC |
| New Haven Steam | New Haven | 641.5 MW | Generation Bridge II Connecticut, LLC |
| Milford Power Project | New Haven | 578 MW | Milford Power Co LLC |
| Bridgeport Station | Fairfield | 576.3 MW | Generation Bridge II Connecticut, LLC |
| Bridgeport Energy Project | Fairfield | 520 MW | Bridgeport Energy LLC |
| Montville Station | New London | 495.3 MW | Montville Power LLC |
| Wallingford Energy | New Haven | 350 MW | Wallingford Energy LLC |
| GenConn Devon LLC | New Haven | 242 MW | GenConn Devon LLC |
| GenConn Middletown LLC | Middlesex | 242 MW | GenConn Middletown LLC |
| Devon Station | New Haven | 222.6 MW | Devon Power LLC |
| Gravel Pit Solar, LLC | Hartford | 120 MW | Gravel Pit Solar, LLC |
| Cos Cob | Fairfield | 115 MW | Connecticut Jet Power LLC |
| Waterbury Generation | New Haven | 96 MW | Engie North America |
| A L Pierce | New Haven | 84 MW | MPH AL Pierce, LLC |
| Algonquin Windsor Locks | Hartford | 71 MW | Ahlstrom Power Windsor Locks LLC |
| Waterside Power, LLC | Fairfield | 69.6 MW | Waterside Power, LLC |
| Wheelabrator Bridgeport | Fairfield | 67 MW | Wheelabrator Environmental Systems |
| Quinebaug Solar | Windham | 49.4 MW | Quinebaug Solar, LLC |
| Plainfield Renewable Energy LLC | Windham | 43 MW | Plainfield Renewable Energy, LLC |
| Pfizer Groton Plant | New London | 37.5 MW | Pfizer Inc |
| Shepaug | New Haven | 37.2 MW | FirstLight Power Resources Services LLC |
| DWW Solar ll | Hartford | 36.9 MW | DWW Solar ll LLC |
| Kimberly Clark-Unit 1,2,3 | Litchfield | 36.3 MW | Kimberly-Clark Corporation |
| Rocky River (CT) | Litchfield | 31 MW | FirstLight Power Resources Services LLC |
| Stevenson | Fairfield | 30.5 MW | FirstLight Power Resources Services LLC |
| Pratt & Whitney | Hartford | 25.8 MW | United Technologies |
| UCONN Cogen Facility | Tolland | 25.7 MW | University of Connecticut |
| Branford | New Haven | 21.8 MW | Connecticut Jet Power LLC |
| Franklin Drive | Litchfield | 21.8 MW | Connecticut Jet Power LLC |
| Torrington | Litchfield | 21.8 MW | Connecticut Jet Power LLC |
| Tunnel | New London | 20.5 MW | FirstLight Power Resources Services LLC |
| Fusion Solar Center LLC | New London | 20 MW | Fusion Solar Centre, L.L.C |
| Woods Hill Solar | Windham | 20 MW | Woods Hill Solar, LLC |
| SR Litchfield | Litchfield | 19.8 MW | SR Litchfield, LLC |
| Nutmeg Solar | Hartford | 19.6 MW | Nutmeg Solar LLC |
| Covanta Southeastern Connecticut Company | New London | 18.3 MW | Covanta Southeastern Connecticut Company |
| Bridgeport Fuel Cell, LLC | Fairfield | 16.6 MW | Bridgeport Fuel Cell, LLC |
| Rand Whitney CHP Plant | New London | 16.5 MW | Rand Whitney Containerboard L.P. |
| Covanta Bristol Energy | Hartford | 16.3 MW | Covanta Bristol Inc |
| Foxwoods CoGen | New London | 16.2 MW | Foxwoods Resort Casino |
| Wallingford Solar | New Haven | 16.1 MW | Wallingford Renewable Energy, LLC |
| North Stonington Solar Center, LLC | New London | 15 MW | Adapture Renewables, Inc. |
| Wheelabrator Lisbon | New London | 14.6 MW | Wheelabrator Environmental Systems |
| Derby Fuel Cell | New Haven | 14 MW | Derby Fuel Cell LLC |
| SR North Stonington | New London | 12 MW | SR North Stonington, LLC |
| Hartford Hospital Cogeneration | Hartford | 11.8 MW | Cartier Energy, LLC |
| Backus Microgrid Project | New London | 10.4 MW | Connecticut Mun Elec Engy Coop |
| Fort Hill 1, 2, 3 & 4 | New London | 10.4 MW | Connecticut Mun Elec Engy Coop |
| Stamford Health | Fairfield | 10.4 MW | Stamford Health Systems, Inc. |
| Generate Colchester Fuel Cells, LLC | New London | 10 MW | Generate Colchester Fuel Cells, LLC |
| Sikorsky Aircraft CHP | Fairfield | 9.9 MW | Sikorsky Aircraft Corporation |
| Falls Village | Litchfield | 9 MW | FirstLight Power Resources Services LLC |
| Derby Hydro | Fairfield | 8.6 MW | McCallum Enterprises I LP |
| Rainbow (CT) | Hartford | 8 MW | Farmington River Power Company |
| Naval Sub Base New London Fuel Cell | New London | 7.4 MW | Groton Station Fuel Cell, LLC |
| Subase Microgrid Project | New London | 7.4 MW | Connecticut Mun Elec Engy Coop |
| Bulls Bridge | Litchfield | 7.2 MW | FirstLight Power Resources Services LLC |
| Bradley Energy Center | Hartford | 5.8 MW | Ameresco Select Inc |
| Pfizer Groton Fuel Cell | New London | 5.6 MW | Groton Fuel Cell 1 LLC |
| Bridge Street 1 & 2 | New London | 5.2 MW | Connecticut Mun Elec Engy Coop |
| Gary Court 1 & 2 | New London | 5.2 MW | Connecticut Mun Elec Engy Coop |
| Lebanon Pines 1 & 2 | New London | 5.2 MW | Connecticut Mun Elec Engy Coop |
| LNG 1 & 2 | New London | 5.2 MW | Connecticut Mun Elec Engy Coop |
| Water Treatment 1 & 2 | New London | 5.2 MW | Connecticut Mun Elec Engy Coop |
| East Windsor Solar One | Hartford | 5 MW | DG Connecticut III, LLC |
| North Franklin Solar | New London | 5 MW | NJR Clean Energy Ventures Corporation |
| Somers Solar Center, LLC | Tolland | 5 MW | Onward Energy |
| South Windsor Fuel Cell | Hartford | 5 MW | South Energy Investments LLC |
| UI RCP Bridgeport Seaside | Fairfield | 5 MW | United Illuminating Co |
| Wind Colebrook South | Litchfield | 5 MW | Wind Colebrook South |
| Southington Solar One | Hartford | 4.7 MW | DG Connecticut III, LLC |
| Frito Lay Incorporated | Windham | 4.6 MW | Frito Lay Incorporated Dayville |
| Fairfield University CHP Plant | Fairfield | 4.5 MW | Fairfield University |
| CMEEC - Norwich Stott St Solar Hybrid | New London | 4.3 MW | Tesla Inc. |
| CMEEC - Polaris Park Solar Hybrid | New London | 4.3 MW | Tesla Inc. |
| Danbury Hospital Cogen Plant | Fairfield | 4.3 MW | Danbury Hospital |
| Antares-GRE 314 East Lyme LLC | New London | 4 MW | MN8 Energy LLC |
| East Windsor | Hartford | 4 MW | NJR Clean Energy Ventures Corporation |
| East Windsor Solar Two | Hartford | 4 MW | East Windsor Solar Two, LLC |
| Enfield Solar One | Hartford | 4 MW | Enfield Solar One, LLC |
| HSCo CHP | Hartford | 4 MW | Cartier Energy, LLC |
| Norfolk Landfill Solar Project | Litchfield | 4 MW | NJR Clean Energy Ventures Corporation |
| Raffia Road Solar Project | Hartford | 4 MW | NJR Clean Energy Ventures Corporation |
| Amazon BDL4 | Hartford | 3.9 MW | Telyon AMZ Windsor LLC |
| TRS Fuel Cell | Fairfield | 3.7 MW | TRS Fuel Cell, LLC |
| CCSU Co-Gen-STBY Gen | Hartford | 3.6 MW | Central Connecticut State University |
| Burlington Solar 1 | Hartford | 3.5 MW | DG Connecticut III, LLC |
| Brass Mill Center | New Haven | 3.4 MW | Brass Mill Center |
| UDR Glastonbury Fuel Cell | Hartford | 3.4 MW | UIL Distributed Resources, LLC |
| Goodwin Hydroelectric | Hartford | 3.2 MW | Metropolitan Dist of Hartford |
| Bristol Solar One, LLC | Hartford | 3 MW | DG Connecticut III, LLC |
| Cellu Tissue | Hartford | 3 MW | Dunn Paper East Hartford, LLC |
| Glastonbury Solar One | Hartford | 3 MW | NJR Clean Energy Ventures Corporation |
| Town of Rocky Hill PV CSG | Hartford | 3 MW | Tesla Inc. |
| Windsor Solar One | Hartford | 3 MW | NJR Clean Energy Ventures Corporation |
| Wyre Wynd Hydroelectric Project | New London | 2.8 MW | Relevate Power Management LLC |
| Niagara Bottling - Bloomfield | Hartford | 2.8 MW | Westbound Solar 3, LLC |
| UI RCP New Haven Fuel Cell | New Haven | 2.8 MW | United Illuminating Co |
| UI RCP Woodbridge FC | New Haven | 2.8 MW | United Illuminating Co |
| Jewett City 1 | New London | 2.6 MW | Connecticut Mun Elec Engy Coop |
| Pepperidge Farm Bloomfield | Hartford | 2.6 MW | Pepperidge Farm, Inc.- Bloomfield |
| Becton Dickinson Ground & Roof Top | Litchfield | 2.5 MW | Madison Energy Investments LLC |
| CMEEC - Bozrah | New London | 2.5 MW | Tesla Inc. |
| Quinebaug Lower Project | Windham | 2.5 MW | Quinebaug Associates LLC |
| Wesleyan University Cogen 1 | Middlesex | 2.4 MW | Wesleyan University |
| Kinneytown New Old | New Haven | 2.3 MW | Hydroland Omega LLC |
| Medtronic - New Haven | New Haven | 2.3 MW | Bloom Energy |
| Medtronic - New Haven 2 | New Haven | 2.2 MW | Bloom Energy |
| Barrow Solar | Tolland | 2 MW | Ecos Energy LLC |
| Bilton Solar | Tolland | 2 MW | Ecos Energy LLC |
| Bunce | Litchfield | 2 MW | LSE Indus LLC |
| Canis Major Solar Farm | Hartford | 2 MW | LSE Canis Major LLC |
| CP East Hampton I & II Solar | Middlesex | 2 MW | NJR Clean Energy Ventures Corporation |
| CTGB Maloney and Webster | Tolland | 2 MW | TotalEnergies Renewables USA LLC |
| CTGB Manson Youth | New Haven | 2 MW | TotalEnergies Renewables USA LLC |
| Dickinson Solar (CT) | Windham | 2 MW | Ecos Energy LLC |
| Ellington - 277 Sadds Mill | Tolland | 2 MW | Onyx Asset Services Group |
| Norcap North | Hartford | 2 MW | LSE Canes Venatici LLC |
| Norcap South | Hartford | 2 MW | LSE Coma Berenices LLC |
| Norwich WWTP | New London | 2 MW | City of Norwich - (CT) |
| Platt Hill | Litchfield | 2 MW | LSE Pictor LLC |
| Powder Hill | Hartford | 2 MW | LSE Delphinus LLC |
| Sand Road | Litchfield | 2 MW | LSE Phoenix LLC |
| Scotland Dam | Windham | 2 MW | FirstLight Power Resources Services LLC |
| Stafford MS Ground Mount Community Solar | Tolland | 2 MW | Town of Stafford - (CT) |
| Sydney Solar | Windham | 2 MW | Ecos Energy LLC |
| Torrington Solar One, LLC | Litchfield | 2 MW | DG Connecticut III, LLC |
| Watertown Solar One, LLC | Litchfield | 2 MW | DG Connecticut III, LLC |
| CTGB Osborn | Tolland | 1.8 MW | TotalEnergies Renewables USA LLC |
| Yale New Haven - New London | New London | 1.8 MW | Bloom Energy |
| Barrett Farm Solar - Phase I | Windham | 1.7 MW | Onyx Asset Services Group |
| Emerald Gardens PKI, LLC | Fairfield | 1.6 MW | Emerald Gardens PKI, LLC |
| New Milford Gas Recovery | Litchfield | 1.6 MW | WM Renewable Energy LLC |
| North Haven Solar One | New Haven | 1.6 MW | North Haven Solar One, LLC |
| Taftville | New London | 1.6 MW | FirstLight Power Resources Services LLC |
| Dynamic Energy CT STAG | New Haven | 1.5 MW | Milford Pepes Farm Road Solar LLC |
| FedEx Middletown | Middlesex | 1.5 MW | VCP Realty, LLC |
| Stamford Health Tully Health Center | Fairfield | 1.5 MW | Stamford Health Tully Health Center |
| CCSU Fuel Cell Project | Hartford | 1.4 MW | New Britain Renewable Energy, LLC |
| Tenth Street | New London | 1.4 MW | City of Norwich - (CT) |
| Trinity College Fuel Cell | Hartford | 1.4 MW | Onsite Partners, LLC |
| UB Fuel Cell | Fairfield | 1.4 MW | UB Fuel Cell |
| CMEEC - Rogers Rd Solar | New London | 1.3 MW | Tesla Inc. |
| ALDI DC 2 | Hartford | 1.2 MW | Powerflex |
| Connecticut College | New London | 1.2 MW | Bloom Energy |
| New Britain - 142 Deming Rd | Hartford | 1.2 MW | Onyx Asset Services Group |
| IKEA New Haven Rooftop PV & Fuel Cell | New Haven | 1.1 MW | IKEA Property Inc |
| Town of Branford | New Haven | 1.1 MW | Tesla Inc. |
| Adams Solar | New London | 1 MW | Ecos Energy LLC |
| Advance Stores Company, Inc | Hartford | 1 MW | Tesla Inc. |
| Amazon BDL3 Solar Project | New Haven | 1 MW | Solar Star Prime 1 LLC |
| Benz Solar 1 | New Haven | 1 MW | Ecos Energy LLC |
| Benz Solar 2 | New Haven | 1 MW | Ecos Energy LLC |
| Blair Solar | Tolland | 1 MW | Ecos Energy LLC |
| Canis Minor Solar Farm | Litchfield | 1 MW | LSE Canis Minor LLC |
| Clinton Solar | New London | 1 MW | Ecos Energy LLC |
| CMEEC - Navy NE Trident | New London | 1 MW | Tesla Inc. |
| Conn Mun Electric Energy Coop | New London | 1 MW | Tesla Inc. |
| Corbin Russwin Phase 3 Berlin | Hartford | 1 MW | Powerflex |
| CP Middletown Solar I LLC | Middlesex | 1 MW | Green Street Power Partners |
| CP Middletown Solar II LLC | Middlesex | 1 MW | Green Street Power Partners |
| FDX010.0 FedEx Fuel Cell | Middlesex | 1 MW | 2016 ESA Project Company, LLC |
| Few Solar | Tolland | 1 MW | Ecos Energy LLC |
| Franklin Solar (CT) | New London | 1 MW | Ecos Energy LLC |
| Hamilton Solar | New London | 1 MW | Ecos Energy LLC |
| Hartford Landfill Solar EGF | Hartford | 1 MW | Materials Innovation Recycling Authority |
| Jackson Solar (CT) | New London | 1 MW | Ecos Energy LLC |
| Jefferson Solar (CT) | New London | 1 MW | Ecos Energy LLC |
| Madison Solar (CT) | Tolland | 1 MW | Ecos Energy LLC |
| Manchester Community College East | Hartford | 1 MW | Onyx Asset Services Group |
| Manchester Community College North | Hartford | 1 MW | Onyx Asset Services Group |
| McHenry Solar | Windham | 1 MW | Ecos Energy LLC |
| Park Solar | New Haven | 1 MW | Ecos Energy LLC |
| Plainfield Solar 1 | Windham | 1 MW | Ecos Energy LLC |
| Plainfield Solar 2 | Windham | 1 MW | Ecos Energy LLC |
| Sherman Solar | New London | 1 MW | Ecos Energy LLC |
| Ticket Network South Windsor | Hartford | 1 MW | Powerflex |
| Wilson Solar (CT) | New London | 1 MW | Ecos Energy LLC |
| Broadleaf Solar | Hartford | 0 MW | Broadleaf Solar, LLC |
| CT Airport Authority Solar One | Hartford | 0 MW | CAA CT Solar One, LLC |
| Elevate Middletown | Middlesex | 0 MW | Lighthouse Middletown, LLC |
| Groton Flanders Road Landfill | New London | 0 MW | NJR Clean Energy Ventures Corporation |
| KCE CT 1, LLC | Windham | 0 MW | Key Capture Energy |
| Mansfield Landfill | Tolland | 0 MW | NJR Clean Energy Ventures Corporation |
| Pure Hedge LLC | Windham | 0 MW | Pure Hedge LLC |
| Putnam Meadow Solar Station | Windham | 0 MW | Putnam Meadow Solar Station, LLC |
| Stafford Solar One | Tolland | 0 MW | NJR Clean Energy Ventures Corporation |
| Windsor Locks | Hartford | 0 MW | ENGIE Distributed Renewables Development LLC |
| Woodstock Solar One | Windham | 0 MW | NJR Clean Energy Ventures Corporation |