Eleven Mile Solar Center
Solar and battery storage project in Pinal County, Arizona. 600 MW of nameplate capacity across 2 generators, operated by Eleven Mile Solar Center, LLC.
Also known as EIA plant 66263
This project groups Eleven Mile Solar Center (EIA 66263). EIA reports them as separate plants.
Analyst: free account, 1 question a day.
Key facts
- Capacity
- 600 MWSolar 300.0 · Battery storage 300.0
- Generators
- 2 operatingEIA-860M, August 2026
- Operating since
- June 2024First generator online
- Operator
- Eleven Mile Solar Center, LLCEIA operator ID 65368
- Grid
- SRPBalancing authority SRP
- Price nodes
- None linkedNo verified ISO node
- Location
- Pinal County, AZ32.8610, −111.5919
- EIA plant ID
- 66263EIA plant page
Data as of EIA-860M August 2026 (published 2026-09-24). Capacity is nameplate, not live output.
How much power Eleven Mile Solar Center produces
Free · EIA-923Net generation, 2025
793 GWh
792,639 MWh, final
Capacity factor, 2025
31.7%
2024: Not reported
January to July 2026
483 GWh
Provisional
| 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 | Not reported | Not reported | 0 of 12 |
| 2023 | Not reported | Not reported | 0 of 12 |
| 2024 | 416,419 | Not reported | 7 of 12 |
| 2025 | 792,639 | 31.7% | 12 of 12 |
| 2026 (provisional, partial year) | 483,447 | 33.2% | 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 |
|---|---|---|---|
| 1111 | Solar Photovoltaic | 300.0 | June 2024 |
| 2222 | Batteries | 300.0 | June 2024 |
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 Eleven Mile Solar Center, 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 Eleven Mile Solar Center
How much power does Eleven Mile Solar Center produce?
Eleven Mile Solar Center reported 792,639 MWh (793 GWh) of net generation in 2025, a 31.7% capacity factor on 600 MW of nameplate capacity. From January to July 2026 it reported 483 GWh, which is provisional.
Where is Eleven Mile Solar Center?
Eleven Mile Solar Center is in Pinal County, Arizona, at 32.8610, −111.5919. It is in the Salt River Project balancing area (SRP).
Who operates Eleven Mile Solar Center?
EIA-860M for August 2026 lists Eleven Mile Solar Center, LLC as the operator (EIA operator ID 65368). The operator is not always the owner.
Is Eleven Mile Solar Center a solar or a battery storage plant?
Both. Solar capacity totals 300 MW and battery storage capacity totals 300 MW.
When did Eleven Mile Solar Center start operating?
Its first generator began operating in June 2024, 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