Planned battery storage projects in Arizona
What EIA-860M's Planned sheet says is coming in Arizona: 23 battery storage projects totalling 10 GW, each with the in-service year its developer reported and the construction status EIA records. A planned project is not a built one.
As of 2026-07 (inventory dated 2026-07-31) · EIA-860M Preliminary Monthly Electric Generator Inventory · eia.gov/…/july_generator2026.xlsx · eia.gov/…/eia860m
- Planned projects
- 23
- 37 generating units
- Proposed capacity
- 10 GW
- Earliest in-service year
- 2026
- Latest in-service year
- 2030
Map of planned battery storage projects in Arizona
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List of planned battery storage projects in Arizona
| Snowflake A Solar and BESS2 technologies | Clenera DevCo LLC | Navajo | 950 | 2 | 2027 | Regulatory approvals pending. Not under construction |
| Eagle Eye Solar and Storage2 technologies | EAGL bn, LLC | La Paz | 800 | 2 | 2028 | Regulatory approvals pending. Not under construction |
| CO Bar Solar and BESS2 technologies | Clenera DevCo LLC | Coconino | 800 | 2 | 2027 | Planned for installation |
| CO Bar D Solar and BESS2 technologies | Clenera DevCo LLC | Coconino | 788 | 2 | 2028 | Planned for installation |
| Desert Sand BESS2 technologies | DESA bn, LLC | Maricopa | 600 | 2 | 2028 | Regulatory approvals pending. Not under construction |
| THREE SISTERS Solar Generation and BESS2 technologies | THSI bn, LLC | Pinal | 600 | 2 | 2029 | Regulatory approvals pending. Not under construction |
| Pioneer Clean Energy Center2 technologies | Yuma bn, LLC | Yuma | 600 | 2 | 2027 | Under construction |
| Maricopa SolarBatteries | Maricopa Solar | Maricopa | 550 | 1 | 2026 | Under construction |
| Hashknife Energy Center LLC2 technologies | Invenergy Services LLC | Navajo | 550 | 2 | 2026 | Under construction |
| Sawtooth Solar2 technologies | EDF Renewables Development, Inc. | Pinal | 500 | 2 | 2028 | Regulatory approvals pending. Not under construction |
| CO Bar C Solar and BESS2 technologies | Clenera DevCo LLC | Coconino | 412 | 2 | 2027 | Planned for installation |
| Hashknife Energy Center II LLC2 technologies | Invenergy Services LLC | Navajo | 400 | 2 | 2027 | Under construction |
| Valley Farms Energy CenterBatteries | Valley Farms Energy Center, LLC | Pinal | 400 | 1 | 2027 | Under construction |
| Atlas VIIIBatteries | Atlas VIII LLC | La Paz | 382.4 | 2 | 2026 | Under construction |
| Selma Energy Center2 technologies | Selma Energy Center, LLC | Pinal | 275 | 2 | 2027 | Under construction |
| Romero Energy CenterBatteries | Romero Energy Center, LLC | Maricopa | 225 | 1 | 2027 | Under construction |
| Romero Energy Center II, LLCBatteries | Romero Energy Center II, LLC | Maricopa | 225 | 1 | 2028 | Under construction |
| Kitt Solar2 technologies | 301AK 8me LLC | Pinal | 200 | 2 | 2026 | Under construction |
| AgaveBatteries | Arizona Public Service Co | Maricopa | 150 | 1 | 2026 | Construction complete |
| Atlas BESS IV LLCBatteries | ATLAS BESS IV, LLC | La Paz | 150 | 1 | 2027 | Under construction |
| Desert BloomBatteries | RE Desert Bloom LLC | Maricopa | 150 | 1 | 2026 | Construction complete |
| Sierra Luna Energy StorageBatteries | Sierra Luna Energy Storage LLC | Maricopa | 150 | 1 | 2030 | Planned for installation |
| White Tank Energy StorageBatteries | White Tank Energy Storage LLC | Maricopa | 100 | 1 | 2027 | Under construction |
Where they are in the build
- Under construction7
- Regulatory approvals pending. Not under construction5
- Under construction5
- Planned for installation4
- Construction complete2
Planned battery storage projects in Arizona: FAQ
- How many battery storage projects are planned in Arizona?
- 23, for 10 GW of nameplate capacity. These are generators developers have reported to EIA, not generators that exist.
- What do the status letters mean?
- EIA files each planned generator under a status: regulatory approvals pending, under construction at or below half complete, under construction more than half complete, construction complete but not yet in commercial operation, or planned but not yet started. Each row shows its own.
- Do these projects always get built?
- No. EIA keeps a separate Canceled or Postponed sheet, and projects move between the sheets month to month. This page is the Planned sheet for 2026-07 and nothing more.