Data last collected:
PowerPlantFactsEvidence report · prepared 19 October 2026https://powerplantfacts.com/entity/58516
EIA plant 58516
Casa Grande · Pinal · AZ
Union HS at Casa Grande
Operated by Luminace Solar Holding, LLC
Published location
Where is Union HS at Casa Grande?
This locator uses the coordinates in the approved source record. It shows geographic context, not a site boundary, safety zone or property-risk area.
32.936944, -111.738611
Open the interactive map ↗Map data © OpenStreetMap contributors
Capacity is not generation. Nameplate MW describes equipment; annual MWh describes recorded output. Proposed and retired units are not added to operating capacity.
Equipment mix
Operating capacity by technology
Grouped from this plant’s represented generator records. Use the AZ plant index for regional peers.
See the evidence
Electricity output across the year
Monthly net generation shows the seasonal shape of this plant's represented output. A negative value is retained when the source reports net consumption.
1174
2204
3205
4285
5253
6256
7300
8298
9280
10238
11192
12174
MWh net generation · 2024 final edition · EIA 923 represented operating rows. 12 of 12 supplied rows shown; 0 missing values omitted. Months with no reported numeric value are omitted, not treated as zero.
Read the chart as a table
| Record | MWh net generation |
|---|---|
| 1 | 174 |
| 2 | 204 |
| 3 | 205 |
| 4 | 285 |
| 5 | 253 |
| 6 | 256 |
| 7 | 300 |
| 8 | 298 |
| 9 | 280 |
| 10 | 238 |
| 11 | 192 |
| 12 | 174 |
2024 monthly net generation
| Month | Net generation |
|---|---|
| 1 | 174 MWh |
| 2 | 204 MWh |
| 3 | 205 MWh |
| 4 | 285 MWh |
| 5 | 253 MWh |
| 6 | 256 MWh |
| 7 | 300 MWh |
| 8 | 298 MWh |
| 9 | 280 MWh |
| 10 | 238 MWh |
| 11 | 192 MWh |
| 12 | 174 MWh |
Operating generators
| ID | Technology | Fuel | MW | Status |
|---|---|---|---|---|
| PV1 | Solar Photovoltaic | SUN | 1.6 | OP |
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Similar-capacity plants in the same state
Identity, technology and limitations
EIA plant ID
58516
Sector
IPP Non-CHP
Water source
Unavailable
Data edition
2024-final
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Questions this evidence can answer
01What exactly is this record?
Use the name, place, date and identifiers above to confirm that you have the right Union HS at Casa Grande power plant: capacity and generation | PowerPlantFacts record.
02What does the evidence establish?
Read the reported values with their units, coverage dates and source notes. Keep observed facts separate from estimates or interpretation.
03What should I verify next?
Follow the primary-source links and check the limitations before using this evidence for a decision, comparison or citation.
A closer look at Union HS at Casa Grande
Variation in the published months
Across 12 numeric monthly generation entries, 7 has the highest recorded value (300 MWh) and 1, 12 the lowest (174 MWh). Their difference is 126 MWh. Missing months have not been treated as zero.
Generator capacity in different operating conditions
| Generator ID | Technology | Nameplate MW | Summer MW | Winter MW | Minimum load MW |
|---|---|---|---|---|---|
| PV1 | Solar Photovoltaic | 1.6 | 1.6 | 1.6 | Not supplied |
EIA-860 2024 final source. Ratings describe capacity, not actual generation or availability. Missing ratings are not zero.
Source: US Energy Information Administration Form EIA-860 2024 plant and operable-generator workbooks; archive 2024. US EIA-authored information is generally public domain; cite EIA, preserve third-party exceptions, changes and no-endorsement context. Source-specific derived data.