Battery Storage Projects in Arizona

Every operating battery storage project in Arizona on EIA-860M for 2026-07: 42 plants, 65 storage units and 8 GW of nameplate capacity across 8 counties.

As of 2026-07 (inventory dated 2026-07-31) · EIA-860M Preliminary Monthly Electric Generator Inventory · eia.gov/…/july_generator2026.xlsx · eia.gov/…/eia860m

Plants
42
65 generating units
Nameplate capacity
8 GW
Counties
8
Grid operator
Mixed
no single ISO covers a majority

Map of battery storage projects in Arizona

Every one of the 42 plants is drawn at the coordinate EIA files for it.

Loading map…
  • Battery · 42

List of battery storage projects in Arizona

Sort by any column. Capacity is nameplate, summed across every generating unit EIA lists at the site.

battery storage projects in Arizona
Eleven Mile Solar Center2 technologiesEleven Mile Solar Center, LLCPinal60022024Operating
Sun Streams 42 technologiesSun Streams Expansion, LLCMaricopa60022025Operating
Harquahala 22 technologiesCopia PowerMaricopa60022025Operating
Roadrunner Solar and BESS2 technologiesClenera LLCCochise47022025Operating
Catclaw Solar2 technologies311SV 8me, LLCMaricopa45022026Operating
Sun Streams 32 technologiesSun Streams PVS, LLCMaricopa43022024Operating
Serrano2 technologiesSerrano Solar, LLCPima383.822025Operating
Papago Energy StorageBatteriesRE Papago LLCMaricopa30012025Operating
Atlas VIIBatteriesAtlas VII LLCLa Paz30022025Operating
Sierra Estrella Energy StorageBatteriesSierra Estrella Energy Storage, LLCMaricopa25012024Operating
Beehive Energy StorageBatteriesBeehive Energy Storage, LLCMaricopa25012026Operating
Pediment BESS IBatteriesPediment BESS I LLCMaricopa25012026Operating
WestwingBatteriesAES Clean EnergyMaricopa20022024Operating
Roadrunner Reserve Phase 1BatteriesTucson Electric Power CoPima20012025Operating
Flatland StorageBatteriesFlatland Storage LLCPinal20012025Operating
Roadrunner Reserve Phase 2BatteriesTucson Electric Power CoPima20012026Operating
Wilmot Energy Center II2 technologiesWilmot Energy Center II, LLCPima20022026Operating
McFarland CBatteriesAES Clean EnergyYuma18512025Operating
Scatter Wash 1BatteriesScatter Wash Energy Storage, LLCMaricopa17012025Operating
Sun Pond2 technologiesSun Pond, LLCMaricopa17022026Operating
Atlas IXBatteriesAtlas IX LLCLa Paz15012025Operating
Justice Energy StorageBatteriesStrata Clean EnergyMaricopa15012026Operating
Yuma Solar + Storage2 technologiesInvenergy Services LLCYuma14022025Operating
Mesquite Solar 5, LLC2 technologiesRWE Clean EnergyMaricopa12022023Operating
Sierra Pinta BESSBatteriesLeeward Asset Management, LLCYuma11312025Operating
Saint Energy Storage II LLCBatteriesSaint Energy Storage II LLCPinal10012023Operating
Superstition Energy StorageBatteriesSuperstition Energy Storage, LLCMaricopa9012024Operating
Scatter Wash 2BatteriesScatter Wash Energy Storage, LLCMaricopa8512025Operating
Pluto Energy StorageBatteriesPluto Energy Storage, LLCMaricopa7512025Operating
El Sol BESSBatteriesInvenergy Services LLCMaricopa5012023Operating
Kingman Energy StorageBatteriesKingman Energy Storage LLCMohave5012025Operating
Apache Solar I2 technologiesArizona Electric Pwr Coop IncCochise4032017Operating
SR McNeal2 technologiesSR McNeal, LLCCochise4022023Operating
Chino Valley Solar2 technologiesArizona Public Service CoYavapai3822012Operating
Cotton Center Solar Hybrid2 technologiesArizona Public Service CoMaricopa3422011Operating
Paloma Solar Hybrid2 technologiesArizona Public Service CoMaricopa3422011Operating
Hyder II Hybrid2 technologiesArizona Public Service CoYuma2822013Operating
Mohave Electric Cooperative at Joy Lane2 technologiesMohave Electric Cooperative, Inc.Mohave25.922016Operating
Desert Star Hybrid2 technologiesArizona Public Service CoMaricopa2022015Operating
Iron Horse Battery Storage Hybrid2 technologiesRWE Clean EnergyPima1222017Operating
Pima Energy Storage SystemBatteriesPima Energy Storage SystemPima1012017Operating
AES ES GILBERTBatteriesAES ES GILBERT, LLCMaricopa1012019Out of service and NOT expected to return to service in next calendar year

Largest battery storage projects in Arizona

  1. 1Eleven Mile Solar CenterPinal County, Arizona600 MW
  2. 2Sun Streams 4Maricopa County, Arizona600 MW
  3. 3Harquahala 2Maricopa County, Arizona600 MW
  4. 4Roadrunner Solar and BESSCochise County, Arizona470 MW
  5. 5Catclaw SolarMaricopa County, Arizona450 MW
  6. 6Sun Streams 3Maricopa County, Arizona430 MW
  7. 7SerranoPima County, Arizona383.8 MW
  8. 8Papago Energy StorageMaricopa County, Arizona300 MW
  9. 9Atlas VIILa Paz County, Arizona300 MW
  10. 10Sierra Estrella Energy StorageMaricopa County, Arizona250 MW

Battery storage projects by county in Arizona

The county EIA files against each plant. It is the fastest way to find the plant nearest a given town.

CountyPlantsNameplate MW
Maricopa214,338
Pima61,005.8
Pinal3900
Cochise3550
Yuma4466
La Paz2450
Mohave275.9
Yavapai138

Battery Storage Projects in Arizona: FAQ

How many battery storage projects are in Arizona?
42, with 8 GW of nameplate capacity between them, spread over 8 counties. That is the EIA-860M operating count for 2026-07.
Is there a map of Arizona battery storage projects?
Yes — the map above. Each dot is one battery storage project, sized by nameplate capacity and placed at the coordinates EIA files for it.
Which is the largest battery storage project in Arizona?
Eleven Mile Solar Center, at 600 MW. The table is sorted largest first, so the rest follow it.
Is there a battery storage project near me in Arizona?
The county roll-up below groups every plant by county, which is the quickest way to find the one closest to a given town.
Which grid operator runs Arizona's battery storage projects?
No single ISO or RTO covers most of them. EIA files each plant against its own balancing authority, which in Arizona is largely a vertically integrated utility rather than an organised market.
How current is this, and what is left out?
EIA-860M for 2026-07. EIA technology "Batteries" — grid-connected electrochemical storage of 1 MW and above. Plants below 1 MW are not surveyed by EIA and so are absent; retirements and additions after 2026-07 arrive with the next monthly release.