Eleven Mile Solar Center

OperatingBESSSolarHybrid

Ranked #6 of 55 BESS plants in AZ#33 of 837 nationally

600 MW Batteries (300 MW) + Solar Photovoltaic (300 MW) operating in Pinal, AZ — Salt River Project

EIAGEM

600 MW

Nameplate Capacity

Generators

units

Hybrid (2)

Technology

Batteries + Solar Photovoltaic

2024

Operating Since

Location

Coordinates

32.8675, -111.5715

County

Pinal, AZ

Nearby Plants

South Energy Center
Natural Gas11.5 MW · 1.4 km
1000 Mile Solar
Solar300 MW · 1.4 km
Pinal Central Energy Center Hybrid
BESS30 MW · 2.1 km

Ownership & Operator

Owner data does not fully agree across sources.

EIA typically reports the operating utility, while GEM resolves to the financial owner or parent corporation. Both can be correct.

Field	EIA	GEM	Wikidata
Operator	Eleven Mile Solar Center, LLC	Ørsted A/S [100%]	—
Owner(s)	Eleven Mile Solar Center, LLC	Ørsted	—
Status	Operating	operating	—

Ownership Chain

About

Eleven Mile Solar Center is a 600 MW hybrid solar and battery energy storage system (BESS) located in Pinal County, Arizona. The plant, which began operating in 2024, is owned by Ørsted, a company based in Denmark, and operated by Eleven Mile Solar Center, LLC. The facility utilizes both solar photovoltaic technology with single-axis tracking and batteries for energy storage. The BESS component has a storage capacity of 1200 MWh, with a duration of 4 hours, and uses lithium-ion battery (LIB) chemistry. The plant is connected to the Salt River Project balancing authority within the Western Electricity Coordinating Council (WECC) NERC region.

Eleven Mile Solar Center is ranked as the 15th largest solar plant in Arizona out of 47, and 51st nationally out of 514. In its latest year of operation, the plant generated 792,639 MWh, achieving a capacity factor of 15.1%. Financial data is available for the plant from LBNL, though specific details are not provided.

Generated from EIA, GEM, and public data sources

EIA Plant Profile Global Energy Monitor

Engineering & Generators

Grid Context

NERC Region

WECC

Balancing Authority

Salt River Project

Grid Voltage

230 kV

Regulatory Status

Entity Type

Independent Power Producer

Sector

IPP Non-CHP

Generation

39.3K MWh

Net Discharge

792.6K MWh

Annual Net Energy

15.1%

Capacity Factor

Positive values indicate net discharge (generation exceeds station load). Negative values indicate net charging. Pure battery storage plants are typically net negative due to round-trip efficiency losses.

Financial DataBeta

Source: LBNL Utility-Scale SolarHIGH

$24.0/MWh

LCOE (Levelized Cost)

Pricing & Market Data

This plant is outside organized wholesale electricity markets (ISOs/RTOs). Nodal pricing data is not available.

News & Articles (10)Beta