Great Bay Solar 1
Solar power plant in Somerset County, Maryland. 118 MW of nameplate capacity across 2 generators, operated by Great Bay Solar I LLC.
Also known as EIA plant 59851
Analyst: free account, 1 question a day.
Key facts
- Capacity
- 118 MWNameplate
- Generators
- 2 operatingEIA-860M, August 2026
- Operating since
- March 2018First generator online
- Operator
- Great Bay Solar I LLCEIA operator ID 59633
- Grid
- PJMBalancing authority PJM
- Price nodes
- 1 PJM nodeResource nodes with prices
- Location
- Somerset County, MD38.1689, −75.6975
- EIA plant ID
- 59851EIA plant page
Data as of EIA-860M August 2026 (published 2026-09-24). Capacity is nameplate, not live output.
How much power Great Bay Solar 1 produces
Free · EIA-923Net generation, 2025
135 GWh
134,592 MWh, final
Capacity factor, 2025
13.0%
2024: 21.1%
January to July 2026
86.7 GWh
Provisional
Range, 2019 to 2025
130.8–140.3
GWh a year. Low 2020, high 2022
| Year | Net generation, MWh | Capacity factor | Months reported |
|---|---|---|---|
| 2000 | Not reported | Not reported | 0 of 12 |
| 2001 | Not reported | Not reported | 0 of 12 |
| 2002 | Not reported | Not reported | 0 of 12 |
| 2003 | Not reported | Not reported | 0 of 12 |
| 2004 | Not reported | Not reported | 0 of 12 |
| 2005 | Not reported | Not reported | 0 of 12 |
| 2006 | Not reported | Not reported | 0 of 12 |
| 2007 | Not reported | Not reported | 0 of 12 |
| 2008 | Not reported | Not reported | 0 of 12 |
| 2009 | Not reported | Not reported | 0 of 12 |
| 2010 | Not reported | Not reported | 0 of 12 |
| 2011 | Not reported | Not reported | 0 of 12 |
| 2012 | Not reported | Not reported | 0 of 12 |
| 2013 | Not reported | Not reported | 0 of 12 |
| 2014 | Not reported | Not reported | 0 of 12 |
| 2015 | Not reported | Not reported | 0 of 12 |
| 2016 | Not reported | Not reported | 0 of 12 |
| 2017 | Not reported | Not reported | 0 of 12 |
| 2018 | 107,182 | Not reported | 10 of 12 |
| 2019 | 134,193 | Not reported | 12 of 12 |
| 2020 | 130,761 | 19.8% | 12 of 12 |
| 2021 | 131,646 | 20.0% | 12 of 12 |
| 2022 | 140,293 | 21.4% | 12 of 12 |
| 2023 | 138,880 | 21.1% | 12 of 12 |
| 2024 | 138,734 | 21.1% | 12 of 12 |
| 2025 | 134,592 | 13.0% | 12 of 12 |
| 2026 (provisional, partial year) | 86,704 | 14.4% | 7 of 7 |
* 2026 covers January to July and is provisional. Capacity factor is net generation divided by nameplate capacity times the hours of each reported month.
Power prices and basis
Free account · PJMEmissions
Free · EPA CAMPDNo EPA emissions units are linked to this plant.
Water use
Free · EIA-923 cooling, USGSNo EIA cooling-water record for this plant in 2024. Plants without steam cooling, such as wind, solar and batteries, do not report cooling water.
Generators
Free · EIA-860M| Generator | Technology | Nameplate MW | Online since |
|---|---|---|---|
| GBS01 | Solar Photovoltaic | 75.0 | March 2018 |
| GBS02 | Solar Photovoltaic | 43.0 | August 2020 |
Ownership and offtake
ProOwnership and offtake are part of Pro
Owners and their shares, parent companies, and power purchase agreements with their buyers. EIA-860M lists Great Bay Solar I LLC as the operator, which is not always the owner.
Modeled data
ProPro adds modeled values for this plant. Everything above stays free.
Modeled curtailment
A range, not one number. The lower bound counts hours inside the production tax credit window; the upper bound is the no-credit case.
Expected vs reported generation
Monthly modeled expected output and physical potential next to EIA-923 reported output.
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Questions about Great Bay Solar 1
How much power does Great Bay Solar 1 produce?
Great Bay Solar 1 reported 134,592 MWh (135 GWh) of net generation in 2025, a 13.0% capacity factor on 118 MW of nameplate capacity. From January to July 2026 it reported 86.7 GWh, which is provisional.
Where is Great Bay Solar 1?
Great Bay Solar 1 is in Somerset County, Maryland, at 38.1689, −75.6975. It is in the PJM Interconnection, LLC balancing area (PJM).
Who operates Great Bay Solar 1?
EIA-860M for August 2026 lists Great Bay Solar I LLC as the operator (EIA operator ID 59633). The operator is not always the owner.
When did Great Bay Solar 1 start operating?
Its first generator began operating in March 2018, according to EIA-860M.
Does InfraMap have power prices for Great Bay Solar 1?
Yes. InfraMap has PJM day-ahead and real-time prices at 1 price node linked to Great Bay Solar 1, with the hub price and node-to-hub basis. Prices are free with an InfraMap account; pricing node names are part of InfraMap Pro.
Sources
- EIA-860 2025 (final) and EIA-860M August 2026: plant, generators, capacity, operator and location
- EIA-923 monthly net generation, 2000 to July 2026 (2026 provisional)
- PJM day-ahead and real-time prices; node and hub assignments as of 2026-10-05
Page updated 2026-10-04 from the InfraMap data build. Methodology · Data sources · EIA plant page