West Line Solar, LLC
Solar power plant in Pinal County, Arizona. 100 MW of nameplate capacity across 1 generator, operated by Foster Clean Power A LLC.
Also known as EIA plant 66125
Analyst: free account, 1 question a day.
Key facts
- Capacity
- 100 MWNameplate
- Generators
- 1 operatingEIA-860M, August 2026
- Operating since
- December 2022First generator online
- Operator
- Foster Clean Power A LLCEIA operator ID 67320
- Grid
- SRPBalancing authority SRP
- Price nodes
- None linkedNo verified ISO node
- Location
- Pinal County, AZ32.7559, −111.5548
- EIA plant ID
- 66125EIA plant page
Data as of EIA-860M August 2026 (published 2026-09-24). Capacity is nameplate, not live output.
How much power West Line Solar produces
Free · EIA-923Net generation, 2025
259 GWh
258,633 MWh, final
Capacity factor, 2025
29.5%
2024: 31.1%
January to July 2026
147 GWh
Provisional
Range, 2023 to 2025
258.6–276.5
GWh a year. Low 2025, high 2023
| 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 | Not reported | Not reported | 0 of 12 |
| 2019 | Not reported | Not reported | 0 of 12 |
| 2020 | Not reported | Not reported | 0 of 12 |
| 2021 | Not reported | Not reported | 0 of 12 |
| 2022 | 6,447 | Not reported | 2 of 12 |
| 2023 | 276,469 | 31.6% | 12 of 12 |
| 2024 | 273,581 | 31.1% | 12 of 12 |
| 2025 | 258,633 | 29.5% | 12 of 12 |
| 2026 (provisional, partial year) | 147,236 | 28.9% | 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 accountNo verified ISO price node is linked to this plant, or its price history could not load.
Emissions
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 |
|---|---|---|---|
| WESTL | Solar Photovoltaic | 100.0 | December 2022 |
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 Foster Clean Power A 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 West Line Solar
How much power does West Line Solar, LLC produce?
West Line Solar, LLC reported 258,633 MWh (259 GWh) of net generation in 2025, a 29.5% capacity factor on 100 MW of nameplate capacity. From January to July 2026 it reported 147 GWh, which is provisional.
Where is West Line Solar, LLC?
West Line Solar, LLC is in Pinal County, Arizona, at 32.7559, −111.5548. It is in the Salt River Project balancing area (SRP).
Who operates West Line Solar, LLC?
EIA-860M for August 2026 lists Foster Clean Power A LLC as the operator (EIA operator ID 67320). The operator is not always the owner.
When did West Line Solar, LLC start operating?
Its first generator began operating in December 2022, according to EIA-860M.
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)
Page updated 2026-10-04 from the InfraMap data build. Methodology · Data sources · EIA plant page