Mount Saint Mary's
16300 Old Emmitsburg Road, Emmitsburg, MD 21727Plant Summary Information
Mount Saint Mary's is ranked #42 out of 202 power plants in Maryland in terms of total annual net electricity generation.
Mount Saint Mary's generated 3.1 GWh during the 3-month period between September 2025 to December 2025.
| Plant Name | Mount Saint Mary's |
|---|---|
| Utility Name | Constellation Solar Horizons LLC |
| Location | Frederick County, MD |
| Initial Operation Date | July 2012 |
| Last Update | Dec 2025 |
| Annual Generation | 16.4 GWh |
| Annual Consumption | 58.5 k MMBtu |
| Ranked #5,558 out of 12,613 Power Plants Nationwide | |
| Ranked #1,548 out of 6,463 Solar Power Plants Nationwide | |
| Ranked #42 out of 202 Maryland Power Plants | |
| Ranked #13 out of 159 Maryland Solar Power Plants | |
| Fuel Types | Solar |
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Monthly Net Generation for Mount Saint Mary's
Monthly Plant Fuel Consumption for Mount Saint Mary's
Mount Saint Mary's Details
| Summary Information | |
|---|---|
| Plant Name | Mount Saint Mary's (57758) |
| Plant Address | 16300 Old Emmitsburg Road, Emmitsburg, MD 21727 |
| Utility | Constellation Solar Horizons LLC (57065) |
| Latitude, Longitude | 39.675, -77.345 |
| Generation Dates on File | Jul 2012 to Dec 2025 |
| Initial Operation Date | July 2012 |
| Annual Generation | 16.4 GWh |
| Fuel Types | Solar |
| Federal Energy Regulatory Commission (FERC) Information | |
| FERC Cogeneration Status | No |
| FERC Small Power Producer Status | Yes |
| FERC Small Power Producer Docket Number | QF10-586 |
| FERC Exempt Wholesale Generator Status | No |
| Regulatory Information | |
|---|---|
| Regulatory Status | Non-Regulated |
| NERC Region | RFC |
| Balancing Authority | PJM Interconnection, LLC (PJM) |
| NAICS Code | Utilities (22) |
| Sector | IPP Non-CHP (2) |
| Water Source | |
| Ash Impoundment | |
| Transmission / Distribution Owner | The Potomac Edison Company (15263) MD |
| Grid Voltage | 34.00 kV |
| Energy Storage | No |
Generator PV1 Details Operating July 2012
| Technology | Solar Photovoltaic |
|---|---|
| Prime Mover | Photovoltaic |
| Ownership | Single Owner |
| Nameplate Capacity | 13.7 MW |
| Summer Capacity | 13.7 MW |
| Winter Capacity | 13.7 MW |
| Uprate/Derate Completed | No |
| Status | Operating |
|---|---|
| First Operation Date | July 2012 |
| Combined Heat & Power | No |
| Sector Name | IPP Non-CHP (2) |
| Energy Source | Solar |
| Solid Fuel Gasification | No |
| Multiple Fuels | No |
| Solar Details | |
| Fixed Tilt | Yes |
|---|---|
| Azimuth Angle | 157 |
| Tilt Angle | 25 |
| DC Net Capacity | 16.1 MW |
| Thin Film CDTE | Yes |
| Net Metering Agreement | Yes |
| Net Metering DC Capacity | 16.1 MW |
| Virtual Net Metering Agreement | No |
Mount Saint Mary's Plant Owners
| Owner Name | Address | Ownership | We couldn't locate any owners for this plant |
|---|
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Power plants with a similar annual net generation from Solar.
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|---|---|---|---|
| #1538 | Northern Cardinal Solar SCS IL 1, LLC | Champaign, IL | 16.7 GWh |
| #1539 | Cinnaminson Landfill Solar | Cinnaminson, NJ | 16.7 GWh |
| #1540 | Centinela State Prison | Sacramento, CA | 16.7 GWh |
| #1541 | Eddy II | Eddy, TX | 16.6 GWh |
| #1542 | Gaston Solar I - SC | Gaston, SC | 16.6 GWh |
| #1543 | Pittsfield Solar LLC | Pittsfield, ME | 16.5 GWh |
| #1544 | Calipatria State Prison | Calipatria, CA | 16.5 GWh |
| #1545 | Berrenda Mesa Water District | Lost Hills, CA | 16.5 GWh |
| #1546 | Bovine | Wallis, TX | 16.5 GWh |
| #1547 | Ash Mesa Solar, LLC | Olathe, CO | 16.4 GWh |
| #1549 | TPE Whitney Solar, LLC | Kopperl, TX | 16.3 GWh |
| #1550 | Sierra Pacific Industries (2042-RD) | Red Bluff, CA | 16.3 GWh |
| #1551 | Suwannee Solar Facility | Live Oak, FL | 16.2 GWh |
| #1552 | New Road Solar, LLC | S Brunswick, NJ | 16.2 GWh |
| #1553 | Cardinal Solar LLC | Marion, SC | 16.2 GWh |
| #1554 | Hope Farm Solar, LLC | Cranston, RI | 16.0 GWh |
| #1555 | Solar Hagerstown | Hagerstown, MD | 15.9 GWh |
| #1556 | Solar Glynn | Brunswick, GA | 15.9 GWh |
| #1557 | Pennsauken Brownfield Solar | Pennsauken, NJ | 15.9 GWh |
| #1558 | Blackville Solar Farm, LLC | Blackville, SC | 15.8 GWh |
Nearby Power Plants
Below are closest 20 power plants surrounding Mount Saint Mary's.
| Plant Name | Plant Location | Annual Generation | Distance |
|---|---|---|---|
| Adams Solar LLC PA | Gettysburg, PA | 141.2 GWh | 16.2 mi |
| Baker Point | Thurmont, MD | 13.3 GWh | 7.3 mi |
| Blue Ridge Landfill | Chambersburg, PA | 46.0 GWh | 22.9 mi |
| Cannonball Solar (CSG) | Thurmont, MD | 1.5 GWh | 9.7 mi |
| CES VMT Solar | Hagerstown, MD | 1.4 GWh | 20.3 mi |
| Chambersburg | Chambersburg, PA | 193.8 GWh | 22.4 mi |
| Emmitsburg Solar Arrays | Emmitsburg, MD | 2.4 GWh | 2.1 mi |
| FedEx Hagerstown | Hagerstown, MD | 2.7 GWh | 23.9 mi |
| Fort Detrick Solar PV | Frederick, MD | 20.6 GWh | 17.2 mi |
| Francis Scott Key Mall | Frederick, MD | 1.3 GWh | 20.3 mi |
| Frederick County - Landfill | Frederick, MD | 2.3 GWh | 20.8 mi |
| Hostetter Solar One, LLC | Hagerstown, MD | 3.9 GWh | 18.9 mi |
| Hunterstown | Gettysburg, PA | 12.4 GWh | 16.3 mi |
| Hunterstown Power Plant | Gettysburg, PA | 6.1 TWh | 16.6 mi |
| Maryland Solar | Hagerstown, MD | 26.0 GWh | 21.4 mi |
| Orchard Park | Chambersburg, PA | 49.8 GWh | 23.6 mi |
| Shepherds Mill CSG | Union Bridge, MD | 3.3 GWh | 12.5 mi |
| Solar Hagerstown | Hagerstown, MD | 15.9 GWh | 17.8 mi |
| Spruce - WCMD - Resh I | Hagerstown, MD | 2.8 GWh | 24.3 mi |
| Union Bridge Solar | Union Bridge, MD | 12.3 GWh | 11.6 mi |