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Wallingford Energy

New Haven County, Connecticut · EIA plant ID 55517 · Operator: Wallingford Energy LLC
Natural gasNatural Gas Fired Combustion TurbineISONEBA: ISNE
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Nameplate350MWSummer 318 MW
Generators7in service
Net generation107GWh12 mo to Dec 2025
Capacity factor4%gas/coal/oil units, summer MW
Heat rate10,335Btu/kWhfossil units, electric fuel, HHV
First online2001Runs as peaking

Monthly net generation

EIA-923, all units at the plant. Net of station use; storage can go negative.
FinalPreliminary
010203040GWh200220042006200820102012201420162018202020222024

Capacity factor by year

Net MWh ÷ (summer MW × hours), gas/coal/oil units. Each year uses that year's EIA-860 ratings; the hollow dot is the latest 12 months.
0%5%10%15%200520102015202020253.8% · 12 mo

Heat rate by year

Electric fuel MMBtu × 1000 ÷ net MWh (Btu/kWh, HHV), fossil units only; CT + CA counted as one combined-cycle block.
9,00010,00011,00012,0002005201020152020202510,335 Btu/kWh · 12 mo
Annual data table
YearNet GWhCapacity factorHeat rate (Btu/kWh)
200127.64.5%10,970
2002159.39.6%10,760
200397.15.8%10,571
200459.93.6%10,687
2005110.86.7%10,656
2006226.713.6%10,588
2007278.216.7%10,605
2008132.27.9%10,483
2009108.36.5%10,695
2010217.813.1%10,659
2011183.510.0%10,597
2012108.95.9%10,808
201351.12.8%11,828
201447.72.6%11,557
2015142.67.7%10,752
2016205.911.1%10,477
2017154.78.3%11,168
2018151.76.4%10,770
2019105.73.8%9,981
2020158.95.8%10,603
2021112.74.0%10,042
202278.22.8%11,010
2023161.35.8%11,177
202487.83.0%10,267
20251073.8%10,335

Generators

EIA-860 (annual) with EIA-860M updates through Sep 2026. EIA-923 reports generation by plant, prime mover and fuel, not by unit, so unit-level output isn't shown.
Gen IDTechnologyPrime moverNameplate MWSummer MWOnlineStatusPlanned retirementOEM / model
CTG1Natural Gas Fired Combustion TurbineGT5046.3Oct 2001Operating—coming soon
CTG2Natural Gas Fired Combustion TurbineGT5044.5Sep 2001Operating—coming soon
CTG3Natural Gas Fired Combustion TurbineGT5045.1Aug 2001Operating—coming soon
CTG4Natural Gas Fired Combustion TurbineGT5044.2Aug 2001Operating—coming soon
CTG5Natural Gas Fired Combustion TurbineGT5046.6Aug 2001Operating—coming soon
CTG6Natural Gas Fired Combustion TurbineGT5045.3May 2018Operating—coming soon
CTG7Natural Gas Fired Combustion TurbineGT5046May 2018Operating—coming soon

Owner / operator

Operator: Wallingford Energy LLC. Ownership shares by in-service nameplate MW (EIA-860 Schedule 4; units not listed there are wholly owned by the operator).
Wallingford Energy LLC100.0%350 MW

Nearby plants

Within 80 km.
A L Pierce84 MW0.1 km
Wallingford Solar16 MW0.8 km
Amazon BDL3 Solar Project1 MW1.2 km
North Haven Solar One2 MW8 km
CTGB Manson Youth2 MW9.3 km
CTGB Maloney and Webster2 MW9.3 km