Subase Microgrid Project

Naval Submarine Base New Londo, Groton, CT 6340

Plant Summary Information

Subase Microgrid Project is ranked #40 out of 171 power plants in Connecticut in terms of total annual net electricity generation.

Subase Microgrid Project is comprised of 2 generators and generated 3.2 GWh during the 3-month period between September 2025 to December 2025.

Plant Name	Subase Microgrid Project
Utility Name	Connecticut Mun Elec Engy Coop
Location	Southeastern Connecticut Planning Region, CT
Initial Operation Date	December 2022
Last Update	Dec 2025
Annual Generation	29.6 GWh
Annual Consumption	263.2 k MMBtu
Ranked #4,946 out of 13,301 Power Plants Nationwide
Ranked #1,277 out of 2,218 Natural Gas Power Plants Nationwide
Ranked #40 out of 171 Connecticut Power Plants
Ranked #25 out of 51 Connecticut Natural Gas Power Plants
Fuel Types	Natural Gas

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Summary Information
Plant Name	Subase Microgrid Project (59701)
Plant Address	Naval Submarine Base New Londo, Groton, CT 6340
Utility	Connecticut Mun Elec Engy Coop (4180)
Latitude, Longitude	41.40001, -72.08599
Generation Dates on File	Dec 2022 to Dec 2025
Initial Operation Date	December 2022
Annual Generation	29.6 GWh
Fuel Types	Natural Gas

Federal Energy Regulatory Commission (FERC) Information
FERC Cogeneration Status	No
FERC Small Power Producer Status	No
FERC Exempt Wholesale Generator Status	No

Regulatory Information
Regulatory Status	Regulated
NERC Region	NPCC
Balancing Authority	ISO New England Inc. (ISNE)
NAICS Code	Utilities (22)
Sector	Electric Utility (1)
Water Source
Ash Impoundment	No
Transmission / Distribution Owner	Groton Dept of Utilities - (CT) (7716) CT
Grid Voltage	13.80 kV
Energy Storage	No

Natural Gas Information
Local Distribution Company (LDC)	YANKEE GAS SVC CO
Natural Gas Storage	No

* Data obtained from the 2025 EIA 860 Report

Status	Operating
First Operation Date	December 2022
Combined Heat & Power	No
Sector Name	Electric Utility (1)
Energy Source	Natural Gas
Solid Fuel Gasification	No
Carbon Capture Technology	No
Time From Cold Shutdown To Full Load	OVER
Multiple Fuels	No

Status	Operating
First Operation Date	December 2022
Combined Heat & Power	No
Sector Name	Electric Utility (1)
Energy Source	Natural Gas
Solid Fuel Gasification	No
Carbon Capture Technology	No
Time From Cold Shutdown To Full Load	OVER
Multiple Fuels	No

Owner Name	Address	Generator	Ownership
Fuel Cell Energy	3 Great Pasture Road, Danbury, CT 6810	Generator SFC1	100.00%
Fuel Cell Energy	3 Great Pasture Road, Danbury, CT 6810	Generator SFC2	100.00%

Power plants with a similar annual net generation from Natural Gas.

Rank	Plant Name	Plant Location	Annual Generation
#1267	Mosaic Phosphates Uncle Sam	Uncle Sam, LA	93.4 GWh
#1268	Sycamore (IA)	Johnston, IA	30.5 GWh
#1269	Michigan City	Michigan City, IN	1.9 TWh
#1270	Cimarron River	Liberal, KS	30.3 GWh
#1271	Robert Mueller Energy Center	Austin, TX	30.0 GWh
#1272	Naval Sub Base New London Fuel Cell	Groton, CT	29.9 GWh
#1273	CSL Behring LLC	Bradley, IL	29.8 GWh
#1274	Sun Peak Generating Station	Las Vegas, NV	29.8 GWh
#1275	Mill Creek (KY)	Louisville, KY	7.4 TWh
#1276	Georgia-Pacific Big Island	Big Island, VA	45.8 GWh
#1278	ECP Uptown Campus	Pittsburgh, PA	29.5 GWh
#1279	Albany Medical Ctr Cogen Plant	Albany, NY	29.5 GWh
#1280	Kennecott Power Plant	Magna, UT	127.9 GWh
#1281	Grossmont Hospital	La Mesa, CA	29.2 GWh
#1282	Summit Street Power Plant	Kent, OH	29.2 GWh
#1283	Burlington (IA)	Burlington, IA	29.1 GWh
#1284	Certain Solar - Staten Island	Staten Island, NY	28.9 GWh
#1285	B Braun Medical	Irvine, CA	28.8 GWh
#1286	Norton Powerhouse 2	Worcester, MA	28.7 GWh
#1287	Archer Daniels Midland Mankato	Mankato, MN	28.5 GWh

Below are closest 20 power plants surrounding Subase Microgrid Project.

Plant Name	Plant Location	Annual Generation	Distance
Antares-GRE 314 East Lyme LLC	East Lyme, CT	4.4 GWh	7.8 mi
Bridge Street 1 & 2	Groton, CT	452.0 MWh	2.6 mi
CMEEC - Navy NE Trident	Groton, CT	1.2 GWh	0.5 mi
CMEEC - Polaris Park Solar Hybrid	Gordon, CT	4.5 GWh	1.4 mi
CMEEC - Rogers Rd Solar	Norwich, CT	1.5 GWh	9.7 mi
Conn Mun Electric Energy Coop	Norwich, CT	1.2 GWh	9.7 mi
Connecticut College	New London, CT	10.1 GWh	1.6 mi
Covanta Southeastern Connecticut Company	Preston, CT	106.2 GWh	5.3 mi
Fort Hill 1, 2, 3 & 4	Uncasville, CT	639.0 MWh	5 mi
Foxwoods CoGen	Mashantucket, CT	10.8 GWh	8.2 mi
Gary Court 1 & 2	Groton, CT	381.0 MWh	5.6 mi
Millstone	Waterford, CT	17.0 TWh	7.5 mi
Montville Station	Uncasville, CT	133.2 GWh	2.1 mi
Naval Sub Base New London Fuel Cell	Groton, CT	29.9 GWh	0 mi
Pfizer Groton Fuel Cell	Groton, CT	36.2 GWh	4.6 mi
Pfizer Groton Plant	Groton, CT	82.3 GWh	4.7 mi
Rand Whitney CHP Plant	Montville, CT	132.0 GWh	4.5 mi
Tenth Street	Norwich, CT	1.9 GWh	9.8 mi
Water Treatment 1 & 2	Groton, CT	410.0 MWh	4.3 mi
Yale New Haven - New London	New London, CT	14.0 GWh	4.5 mi