Exelon Medway LLC
9 Summer Street, Medway, MA 2053Plant Summary Information
Exelon Medway LLC is ranked #10 out of 32 distillate fuel oil power plants in Massachusetts in terms of total annual net electricity generation.
Exelon Medway LLC is comprised of 3 generators and generated 1.4 GWh during the 3-month period between September 2025 to December 2025.
| Plant Name | Exelon Medway LLC |
|---|---|
| Utility Name | Constellation Power, Inc |
| Location | Norfolk County, MA |
| Initial Operation Date | July 1970 |
| Last Update | Dec 2025 |
| Annual Generation | 4.4 GWh |
| Annual Consumption | 98.4 k MMBtu |
| Ranked #8,538 out of 13,081 Power Plants Nationwide | |
| Ranked #248 out of 1,233 Distillate Fuel Oil Power Plants Nationwide | |
| Ranked #251 out of 648 Massachusetts Power Plants | |
| Ranked #10 out of 32 Massachusetts Distillate Fuel Oil Power Plants | |
| Fuel Types | Distillate Fuel Oil |
| Previous Operator |
Exelon Power (2013 to 2021) Constellation Power, Inc (2022 to 2025) |
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Monthly Net Generation for Exelon Medway LLC
Monthly Plant Fuel Consumption for Exelon Medway LLC
Exelon Medway LLC Details
| Summary Information | |
|---|---|
| Plant Name | Exelon Medway LLC (1592) |
| Plant Address | 9 Summer Street, Medway, MA 2053 |
| Utility | Constellation Power, Inc (6035) |
| Latitude, Longitude | 42.14003, -71.44644 |
| Generation Dates on File | Jan 2001 to Dec 2025 |
| Initial Operation Date | July 1970 |
| Annual Generation | 4.4 GWh |
| Fuel Types | Distillate Fuel Oil |
| Federal Energy Regulatory Commission (FERC) Information | |
| FERC Cogeneration Status | No |
| FERC Small Power Producer Status | No |
| FERC Exempt Wholesale Generator Status | Yes |
| FERC Exempt Wholesale Generator Docket Number | 98-42-000 |
| Regulatory Information | |
|---|---|
| Regulatory Status | Non-Regulated |
| NERC Region | NPCC |
| Balancing Authority | ISO New England Inc. (ISNE) |
| NAICS Code | Utilities (22) |
| Sector | IPP Non-CHP (2) |
| Water Source | NA |
| Ash Impoundment | No |
| Transmission / Distribution Owner | NSTAR Electric Company (54913) MA |
| Grid Voltage | 230.00 kV / 115.00 kV |
| Energy Storage | No |
Generator GT1 Details Operating July 1970
| Technology | Petroleum Liquids |
|---|---|
| Prime Mover | Combustion Turbine |
| Ownership | Single Owner |
| RTO ISO LMP Node Designation | UN.W_MEDWAY13.8WMJ1 |
| RTO ISO Location Designation For Reporting Wholesale Sales Data | UN.W_MEDWAY13.8WMJ1 |
| Nameplate Capacity | 45 MW |
| Nameplate Power Factor | 0.85 |
| Summer Capacity | 42 MW |
| Winter Capacity | 58.8 MW |
| Minimum Load | 20 MW |
| Uprate/Derate Completed | No |
| Status | Operating |
|---|---|
| First Operation Date | July 1970 |
| Combined Heat & Power | No |
| Sector Name | IPP Non-CHP (2) |
| Energy Source | Distillate Fuel Oil |
| Solid Fuel Gasification | No |
| Carbon Capture Technology | No |
| Time From Cold Shutdown To Full Load | 1H |
| Other Planned Modifications | No |
| Multiple Fuels | No |
Generator GT3 Details Operating July 1970
| Technology | Petroleum Liquids |
|---|---|
| Prime Mover | Combustion Turbine |
| Ownership | Single Owner |
| RTO ISO LMP Node Designation | UN.MEDWAYJ313.8WMJ3 |
| RTO ISO Location Designation For Reporting Wholesale Sales Data | UN.MEDWAYJ313.8WMJ3 |
| Nameplate Capacity | 45 MW |
| Nameplate Power Factor | 0.85 |
| Summer Capacity | 41.1 MW |
| Winter Capacity | 60.7 MW |
| Minimum Load | 20 MW |
| Uprate/Derate Completed | No |
| Status | Operating |
|---|---|
| First Operation Date | July 1970 |
| Combined Heat & Power | No |
| Sector Name | IPP Non-CHP (2) |
| Energy Source | Distillate Fuel Oil |
| Solid Fuel Gasification | No |
| Carbon Capture Technology | No |
| Time From Cold Shutdown To Full Load | 1H |
| Other Planned Modifications | No |
| Multiple Fuels | No |
Generator GT2 Details Operating March 1971
| Technology | Petroleum Liquids |
|---|---|
| Prime Mover | Combustion Turbine |
| Ownership | Single Owner |
| RTO ISO LMP Node Designation | UN.W_MEDWAY13.8WMJ2 |
| RTO ISO Location Designation For Reporting Wholesale Sales Data | UN.W_MEDWAY13.8WMJ2 |
| Nameplate Capacity | 45 MW |
| Nameplate Power Factor | 0.85 |
| Summer Capacity | 39.8 MW |
| Winter Capacity | 60.9 MW |
| Minimum Load | 20 MW |
| Uprate/Derate Completed | No |
| Status | Operating |
|---|---|
| First Operation Date | March 1971 |
| Combined Heat & Power | No |
| Sector Name | IPP Non-CHP (2) |
| Energy Source | Distillate Fuel Oil |
| Solid Fuel Gasification | No |
| Carbon Capture Technology | No |
| Time From Cold Shutdown To Full Load | 1H |
| Other Planned Modifications | No |
| Multiple Fuels | No |
Exelon Medway LLC Plant Owners
| Owner Name | Address | Generator | Ownership | We couldn't locate any owners for this plant |
|---|
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| #246 | Williams | Goose Creek, SC | 2.5 TWh |
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| #258 | NSB Nuiqsut Utility | Nuiqsut, AK | 7.5 GWh |
Nearby Power Plants
Below are closest 20 power plants surrounding Exelon Medway LLC.
| Plant Name | Plant Location | Annual Generation | Distance |
|---|---|---|---|
| 126 Grove Solar LLC | Franklin, MA | 2.2 GWh | 4.6 mi |
| ANP Bellingham Energy Project | Bellingham, MA | 3.1 TWh | 2.1 mi |
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| BWC Muddy Brook, LLC Hybrid | Mendon, MA | 1.9 GWh | 4.3 mi |
| BWC Mystic River | Mendon, MA | 1.8 GWh | 5.6 mi |
| BWC Origination 19 | Hopedale, MA | 1.7 GWh | 3.7 mi |
| BWC Wading River One, Two, Three CSG | Mendon, MA | 1.6 GWh | 5.6 mi |
| Exelon West Medway II LLC | Medway, MA | 258.6 GWh | 0.2 mi |
| Franklin 2 | Franklin, MA | 5.7 GWh | 6.6 mi |
| Holliston LLC | Holliston, MA | 1.8 GWh | 5.2 mi |
| Holliston Solar CSG | Holliston, MA | 1.5 GWh | 2.3 mi |
| Hopkinton CSG | Hopkinton, MA | 2.8 GWh | 6.2 mi |
| Kearsarge Bellingham PV | Bellingham, MA | 4.6 GWh | 4.8 mi |
| Kearsarge William Way | Bellingham, MA | 7.3 GWh | 4.7 mi |
| Medway Grid | Medway, MA | 19.5 GWh | 0.4 mi |
| Mendon | Mendon, MA | 3.8 GWh | 4.1 mi |
| Milford Power LP | Milford, MA | 253.3 GWh | 3.4 mi |
| Millis MA 1 | Millis, MA | 1.5 GWh | 3.7 mi |
| Town of Norfolk MA at Medway Branch | Norfolk, MA | 1.7 GWh | 5.5 mi |