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United States β€Ί Power plants β€Ί Battery storage β€Ί Arizona

BATTERY STORAGE

Westwing

Westwing is a 200 MW operating battery storage site in Maricopa County, Arizona, operated by AES Clean Energy. Its batteries store up to 808 MWh.

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

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Generators

Each generating unit EIA lists at this plant.

UnitTechnologyCapacityStatusOnlineRetired / planned retirement
WEST2Batteries118 MW
479 MWh
OperatingMay 2025
WESTWBatteries82 MW
330 MWh
OperatingSep 2024

Plant details

Operator
AES Clean Energy
Location
Maricopa County, Arizona
Balancing authority
AZPS
Sector
IPP Non-CHP
Capacity
Operating: 200 MW
First unit online
Sep 2024
EIA plant ID
67855

Location

33.7131, -112.3242

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