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United States › Power plants › Battery storage › Arizona

BATTERY STORAGE

Sierra Estrella Energy Storage

Sierra Estrella Energy Storage is a 250 MW operating battery storage site in Maricopa County, Arizona, operated by Sierra Estrella Energy Storage, LLC. Its batteries store up to 1,000 MWh.

Plant statusOperating
  1. Planning (completed)
  2. Consented (completed)
  3. Construction (completed)
  4. OperatingMay 2024 (current stage)
  5. Closed (not yet reached)

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Generators

Each generating unit EIA lists at this plant.

UnitTechnologyCapacityStatusOnlineRetired / planned retirement
BESS3Batteries250 MW
1,000 MWh
OperatingMay 2024

Plant details

Operator
Sierra Estrella Energy Storage, LLC
Location
Maricopa County, Arizona
Balancing authority
SRP
Sector
IPP Non-CHP
Capacity
Operating: 250 MW
First unit online
May 2024
EIA plant ID
66334

Location

33.4108, -112.3138

Nearby power plants

Source: U.S. Energy Information Administration, Form EIA-860M, September 2026. Planned dates are targets reported by the developer and often change. Report a problem