Mount Saint Mary's — Plant Summary
- EIA Plant ID
- 57758
- Capacity
- 13.7 MW
- Primary Fuel
- Solar
- Technology
- Solar Photovoltaic
- Status
- Operating
- Location
- Frederick, MD
- Operating Since
- 2012
- Generators
- 1
- Operator
- Constellation Solar Horizons LLC
- Parent Company
- —
- Annual Generation
- 16,378 MWh
- Capacity Factor
- 13.6%
- Balancing Authority
- PJM Interconnection, LLC
- ISO/RTO
- PJM
- NERC Region
- RFC
Mount Saint Mary's
OperatingSolar
Ranked #17 of 184 Solar plants in MD#1912 of 7447 nationally
13.7 MW Solar operating in Frederick, MD — PJM Interconnection, LLC
EIAGEMWD
13.7 MW
Nameplate Capacity
1
Generators
unit
Solar Photovoltaic
Technology
2012
Operating Since
Location
Coordinates
39.6750, -77.3450
County
Frederick, MD
Nearby Plants
- Emmitsburg Solar ArraysSolar1.7 MW · 3.3 km
- Baker PointSolar9 MW · 11.7 km
- LeGore Bridge Solar CenterSolar20 MW · 11.8 km
Ownership & Operator
| Field | EIA | GEM | Wikidata |
|---|---|---|---|
| Operator | Constellation Solar Horizons LLC | Constellation Solar Horizons | — |
| Owner(s) | Constellation Solar Horizons LLC | — | — |
| Status | Operating | operating | — |
Ownership Chain
No GEM tracker match for this plant — ownership chain unavailable.
About
Mount Saint Mary's is a 13.7 MW solar photovoltaic power plant located in Frederick County, Maryland. The plant, which began operating in 2012, is owned and operated by Constellation Solar Horizons LLC. It utilizes a single generator and fixed-tilt solar tracking technology. The primary fuel source is solar (SUN).
The plant operates within the PJM Interconnection, LLC balancing authority and the RFC NERC region. In terms of size, Mount Saint Mary's is ranked as the 16th largest solar plant out of 183 in Maryland, and 1712th out of 7108 nationally. The latest annual generation data indicates an output of 16,378 MWh, resulting in a capacity factor of 13.6%. Financial data for the plant is available from LBNL Solar.
Generated from EIA, GEM, and public data sources
Engineering & Generators
Grid Context
NERC Region
RFC
Balancing Authority
PJM Interconnection, LLC
Grid Voltage
34 kV
Regulatory Status
NR
Entity Type
Independent Power Producer
Sector
IPP Non-CHP
Interconnection Queue1 projectBeta
Mount St. Mary's PV Park
OperationalSolar14 MWPJM
Generation
681 MWh
Latest Month
16.4K MWh
Annual Generation
13.6%
Capacity Factor
Jan 2023 – Dec 2025
Financial DataBeta
Source: LBNL Utility-Scale SolarHIGH
$203.4/MWh
LCOE (Levelized Cost)
$37.2/MWh
Energy Value
Pricing & Market Data
HIGH confidenceMarket Position
ISO/RTO Market
PJM
LMP Node
CATOCTIN138 KV MTSTMPSP
Pricing Hub
WESTERN HUB
Location Type
Generation Node
Node Source
Curated node match
News & Articles (10)Beta
General
College Wrap: Paskell powers Rider baseball to sweep of Mount St. Mary’s
EMMITSBURG, Md. — Anthony Paskell, Kyle Neri and Charley Magoulic all homered and the Rider baseball team completed a three-game sweep of...
Trentonian·2 days ago
General
Maryland baseball at Mount St. Mary’s preview
Maryland baseball will face in-state foe Mount St. Mary's for the second time this season Tuesday. The Terps will travel to Emmitsburg, Maryland,...
MSN·5 days ago
General
Winter storm hits region; some school closures continue Thursday
Schools and most county government services in Charles, St. Mary's and Calvert counties were closed on Monday and Tuesday, Jan.
SoMdNews.com·1 months ago
General
Winter storm hits region; some school closures continue Thursday
Schools and most county government services in Charles, St. Mary's and Calvert counties were closed on Monday and Tuesday, Jan.
SoMdNews.com·1 months ago
Last updated 2026-03-26
View all 10 articles