Union HS at Casa Grande
Solar power plant in Pinal County, Arizona. 1.6 MW of nameplate capacity across 1 generator, operated by Luminace Solar Holding, LLC.
Also known as EIA plant 58516
Analyst: free account, 1 question a day.
Key facts
- Capacity
- 1.6 MWNameplate
- Generators
- 1 operatingEIA-860M, August 2026
- Operating since
- December 2012First generator online
- Operator
- Luminace Solar Holding, LLCEIA operator ID 58491
- Grid
- AZPSBalancing authority AZPS
- Price nodes
- None linkedNo verified ISO node
- Location
- Pinal County, AZ32.9369, −111.7386
- EIA plant ID
- 58516EIA plant page
Data as of EIA-860M August 2026 (published 2026-09-24). Capacity is nameplate, not live output.
How much power Union HS at Casa Grande produces
Free · EIA-923Net generation, 2025
2.63 GWh
2,625 MWh, final
Capacity factor, 2025
18.7%
2024: 20.3%
January to July 2026
Not reported
Provisional. 0 of 7 months reported
Range, 2015 to 2025
2.6–3.4
GWh a year. Low 2023, high 2016
| 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 | 3,364 | 24.0% | 12 of 12 |
| 2014 | 3,343 | 23.9% | 12 of 12 |
| 2015 | 3,196 | 22.8% | 12 of 12 |
| 2016 | 3,404 | 24.2% | 12 of 12 |
| 2017 | 3,274 | 23.4% | 12 of 12 |
| 2018 | 3,219 | 23.0% | 12 of 12 |
| 2019 | 2,852 | 20.3% | 12 of 12 |
| 2020 | 3,274 | 23.3% | 12 of 12 |
| 2021 | 3,136 | 22.4% | 12 of 12 |
| 2022 | 2,886 | 20.6% | 12 of 12 |
| 2023 | 2,573 | 18.4% | 12 of 12 |
| 2024 | 2,859 | 20.3% | 12 of 12 |
| 2025 | 2,625 | 18.7% | 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 |
|---|---|---|---|
| PV1 | Solar Photovoltaic | 1.6 | December 2012 |
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 Luminace Solar Holding, 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 Union HS at Casa Grande
More plants operated by Luminace Solar Holding, LLC
Questions about Union HS at Casa Grande
How much power does Union HS at Casa Grande produce?
Union HS at Casa Grande reported 2,625 MWh (2.63 GWh) of net generation in 2025, a 18.7% capacity factor on 1.6 MW of nameplate capacity.
Where is Union HS at Casa Grande?
Union HS at Casa Grande is in Pinal County, Arizona, at 32.9369, −111.7386. It is in the Arizona Public Service Company balancing area (AZPS).
Who operates Union HS at Casa Grande?
EIA-860M for August 2026 lists Luminace Solar Holding, LLC as the operator (EIA operator ID 58491). The operator is not always the owner.
When did Union HS at Casa Grande start operating?
Its first generator began operating in December 2012, 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