Data last collected:
PowerPlantFactsEvidence report · prepared 19 October 2026https://powerplantfacts.com/entity/66334
EIA plant 66334
Tolleson · Maricopa · AZ
Sierra Estrella Energy Storage
Operated by Sierra Estrella Energy Storage, LLC
Published location
Where is Sierra Estrella Energy Storage?
This locator uses the coordinates in the approved source record. It shows geographic context, not a site boundary, safety zone or property-risk area.
33.410802, -112.313800
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.
5-212
6-3,863
7-4,067
8-3,886
9-3,850
10-3,716
11-3,330
12-3,325
MWh net generation · 2024 final edition · EIA 923 represented operating rows. 8 of 8 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 |
|---|---|
| 5 | -212 |
| 6 | -3,863 |
| 7 | -4,067 |
| 8 | -3,886 |
| 9 | -3,850 |
| 10 | -3,716 |
| 11 | -3,330 |
| 12 | -3,325 |
2024 monthly net generation
| Month | Net generation |
|---|---|
| 5 | -212 MWh |
| 6 | -3,863 MWh |
| 7 | -4,067 MWh |
| 8 | -3,886 MWh |
| 9 | -3,850 MWh |
| 10 | -3,716 MWh |
| 11 | -3,330 MWh |
| 12 | -3,325 MWh |
Operating generators
| ID | Technology | Fuel | MW | Status |
|---|---|---|---|---|
| BESS3 | Batteries | MWH | 250 | OP |
Continue exploring
Similar-capacity plants in the same state
Identity, technology and limitations
EIA plant ID
66334
Sector
IPP Non-CHP
Water source
Unavailable
Data edition
2024-final
Use this record
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 Sierra Estrella Energy Storage 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 Sierra Estrella Energy Storage
Generator capacity in different operating conditions
| Generator ID | Technology | Nameplate MW | Summer MW | Winter MW | Minimum load MW |
|---|---|---|---|---|---|
| BESS3 | Batteries | 250.0 | 250.0 | 250.0 | 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.