Mass Midstate Solar 1
Solar power plant in Worcester County, Massachusetts. 5 MW of nameplate capacity across 1 generator, operated by Evergreen Wind, LLC.
Also known as EIA plant 58279
Analyst: free account, 1 question a day.
Key facts
- Capacity
- 5 MWNameplate
- Generators
- 1 operatingEIA-860M, August 2026
- Operating since
- May 2014First generator online
- Operator
- Evergreen Wind, LLCEIA operator ID 59155
- Grid
- ISO-NEBalancing authority ISNE
- Price nodes
- 1 ISONE nodeResource nodes with prices
- Location
- Worcester County, MA42.2197, −71.8783
- EIA plant ID
- 58279EIA plant page
Data as of EIA-860M August 2026 (published 2026-09-24). Capacity is nameplate, not live output.
How much power Mass Midstate Solar 1 produces
Free · EIA-923Net generation, 2025
7.11 GWh
7,107 MWh, final
Capacity factor, 2025
16.2%
2024: 16.5%
January to July 2026
Not reported
Provisional. 0 of 7 months reported
Range, 2015 to 2025
6.3–7.8
GWh a year. Low 2017, 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 | 4,534 | Not reported | 8 of 12 |
| 2015 | 7,446 | 17.0% | 12 of 12 |
| 2016 | 7,633 | 17.4% | 12 of 12 |
| 2017 | 6,269 | 14.3% | 12 of 12 |
| 2018 | 6,355 | 14.5% | 12 of 12 |
| 2019 | 7,334 | 16.7% | 12 of 12 |
| 2020 | 7,408 | 16.9% | 12 of 12 |
| 2021 | 7,382 | 16.9% | 12 of 12 |
| 2022 | 7,813 | 17.8% | 12 of 12 |
| 2023 | 7,331 | 16.7% | 12 of 12 |
| 2024 | 7,248 | 16.5% | 12 of 12 |
| 2025 | 7,107 | 16.2% | 12 of 12 |
| 2026 (provisional, partial year) | Not reported | Not reported | 0 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 · ISONEEmissions
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 |
|---|---|---|---|
| 1 | Solar Photovoltaic | 5.0 | May 2014 |
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 Evergreen Wind, 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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Power plants near Mass Midstate Solar 1
More plants operated by Evergreen Wind, LLC
Questions about Mass Midstate Solar 1
How much power does Mass Midstate Solar 1 produce?
Mass Midstate Solar 1 reported 7,107 MWh (7.11 GWh) of net generation in 2025, a 16.2% capacity factor on 5 MW of nameplate capacity.
Where is Mass Midstate Solar 1?
Mass Midstate Solar 1 is in Worcester County, Massachusetts, at 42.2197, −71.8783. It is in the ISO New England Inc. balancing area (ISNE).
Who operates Mass Midstate Solar 1?
EIA-860M for August 2026 lists Evergreen Wind, LLC as the operator (EIA operator ID 59155). The operator is not always the owner.
When did Mass Midstate Solar 1 start operating?
Its first generator began operating in May 2014, according to EIA-860M.
Does InfraMap have power prices for Mass Midstate Solar 1?
Yes. InfraMap has ISONE day-ahead and real-time prices at 1 price node linked to Mass Midstate 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)
- ISONE 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