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13.7 MW Solar operating in Frederick, MD — PJM Interconnection, LLC
13.7 MW
Nameplate Capacity
1
Generators
unit
Solar Photovoltaic
Technology
2012
Operating Since
Coordinates
39.6750, -77.3450
County
Frederick, MD
Nearby Plants
| Field | EIA | GEM | Wikidata |
|---|---|---|---|
| Operator | Constellation Solar Horizons LLC | Constellation Solar Horizons | — |
| Owner(s) | Constellation Solar Horizons LLC | — | — |
| Status | Operating | operating | — |
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
ISO/RTO
PJM
Market
ISO/RTO Member
NERC Region
RFC
Balancing Authority
681 MWh
Latest Month
16.4K MWh
Annual Generation
13.6%
Capacity Factor
Data from 2012–2024
$37.2/MWh
Energy Value
$2.9/MWh
Capacity Value
Market Position
ISO/RTO Market
PJM
LMP Node
CATOCTIN138 KV MTSTMPSP
Pricing Hub
WESTERN HUB
Location Type
Generation Node
Node Source
Curated node match
Last updated 2026-03-26
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ask pi about Mount Saint Mary'sPJM Interconnection, LLC (PJM)
Grid Voltage
34.0 kV
Regulatory Status
NR — Non-Regulated
Entity Type
Independent Power Producer
Sector
IPP Non-CHP