Foothills Solar Plant Hybrid
Solar and battery storage project in Yuma County, Arizona. 73 MW of nameplate capacity across 3 generators, operated by Arizona Public Service Co.
Also known as EIA plant 57997
This project groups Foothills Solar Plant Hybrid (EIA 57997). EIA reports them as separate plants.
Analyst: free account, 1 question a day.
Key facts
- Capacity
- 73 MWSolar 38.0 · Battery storage 35.0
- Generators
- 3 operatingEIA-860M, August 2026
- Operating since
- March 2013First generator online
- Operator
- Arizona Public Service CoEIA operator ID 803
- Grid
- AZPSBalancing authority AZPS
- Price nodes
- None linkedNo verified ISO node
- Location
- Yuma County, AZ32.6486, −114.4287
- EIA plant ID
- 57997EIA plant page
Data as of EIA-860M August 2026 (published 2026-09-24). Capacity is nameplate, not live output.
How much power Foothills Solar Plant Hybrid produces
Free · EIA-923Net generation, 2025
80.2 GWh
80,232 MWh, final
Capacity factor, 2025
25.9%
2024: Not reported
January to July 2026
Not reported
Provisional. 0 of 7 months reported
Range, 2015 to 2025
80.2–110.8
GWh a year. Low 2025, high 2015
| 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 | 61,100 | 51.1% | 10 of 12 |
| 2014 | 80,654 | 28.7% | 11 of 12 |
| 2015 | 110,820 | 36.1% | 12 of 12 |
| 2016 | 96,915 | 31.5% | 12 of 12 |
| 2017 | 95,588 | 31.2% | 12 of 12 |
| 2018 | 93,025 | 30.3% | 12 of 12 |
| 2019 | 95,510 | 31.2% | 12 of 12 |
| 2020 | 97,826 | 31.8% | 12 of 12 |
| 2021 | 104,279 | 34.0% | 12 of 12 |
| 2022 | 96,854 | 31.6% | 12 of 12 |
| 2023 | 81,080 | Not reported | 9 of 12 |
| 2024 | 97,802 | Not reported | 12 of 12 |
| 2025 | 80,232 | 25.9% | 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 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 |
|---|---|---|---|
| FH38M | Batteries | 35.0 | April 2023 |
| PV1 | Solar Photovoltaic | 18.0 | March 2013 |
| PV2 | Solar Photovoltaic | 20.0 | December 2013 |
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 Arizona Public Service Co 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 Foothills Solar Plant Hybrid
More plants operated by Arizona Public Service Co
Questions about Foothills Solar Plant Hybrid
How much power does Foothills Solar Plant Hybrid produce?
Foothills Solar Plant Hybrid reported 80,232 MWh (80.2 GWh) of net generation in 2025, a 25.9% capacity factor on 73 MW of nameplate capacity.
Where is Foothills Solar Plant Hybrid?
Foothills Solar Plant Hybrid is in Yuma County, Arizona, at 32.6486, −114.4287. It is in the Arizona Public Service Company balancing area (AZPS).
Who operates Foothills Solar Plant Hybrid?
EIA-860M for August 2026 lists Arizona Public Service Co as the operator (EIA operator ID 803). The operator is not always the owner.
Is Foothills Solar Plant Hybrid a solar or a battery storage plant?
Both. Solar capacity totals 38 MW and battery storage capacity totals 35 MW.
When did Foothills Solar Plant Hybrid start operating?
Its first generator began operating in March 2013, 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