Sonoran Solar Energy — Plant Summary
- EIA Plant ID
- 66627
- Capacity
- 750 MW
- Primary Fuel
- Solar
- Technology
- Batteries, Solar Photovoltaic
- Status
- Operating
- Location
- Maricopa, AZ
- Operating Since
- 2023
- Generators
- 2
- Operator
- Sonoran Solar Energy, LLC
- Parent Company
- NextEra Energy
- Annual Generation
- 1,077,137 MWh
- Capacity Factor
- 16.4%
- Balancing Authority
- Salt River Project
- ISO/RTO
- —
- NERC Region
- WECC
Sonoran Solar Energy
OperatingBESSSolarHybrid
Ranked #2 of 104 Solar plants in AZ#12 of 7447 nationally
750 MW Batteries (260 MW) + Solar Photovoltaic (490 MW) operating in Maricopa, AZ — Salt River Project
EIAGEM
750 MW
Nameplate Capacity
2
Generators
units
Hybrid (2)
Technology
Batteries + Solar Photovoltaic
2023
Operating Since
Location
Coordinates
33.2488, -112.5424
County
Maricopa, AZ
Nearby Plants
- Desert Star HybridBESS20 MW · 15.9 km
- Buckeye Union HS District 201Solar3.3 MW · 19.0 km
- RE Gillespie 1 LLCSolar15 MW · 19.3 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 | Sonoran Solar Energy, LLC | NextEra Energy Inc [100%] | — |
| Owner(s) | Sonoran Solar Energy, LLC | NextEra Energy | — |
| Status | Operating | operating | — |
Ownership Chain
About
Sonoran Solar Energy is a 750 MW hybrid power plant located in Maricopa County, Arizona. The facility, which began operating in 2023, combines solar photovoltaic generation with battery energy storage. It is owned by NextEra Energy and operated by Sonoran Solar Energy, LLC. The plant utilizes single-axis tracking for its solar panels. The battery energy storage system (BESS) has a capacity of 1040 MWh and a duration of 4 hours, employing lithium-ion battery chemistry (LIB).
The plant's latest annual generation was 1,077,137 MWh, resulting in a capacity factor of 16.4%. Sonoran Solar Energy operates within the Salt River Project balancing authority and the Western Electricity Coordinating Council (WECC) NERC region. The plant ranks as the 7th largest in Arizona out of 47 facilities and 31st nationally out of 514. Financial data indicates a power purchase agreement (PPA) price of $18.31 per MWh.
Generated from EIA, GEM, and public data sources
Engineering & Generators
Grid Context
NERC Region
WECC
Balancing Authority
Salt River Project
Grid Voltage
500 kV
Regulatory Status
NR
Entity Type
Independent Power Producer
Sector
IPP Non-CHP
Generation
56.0K MWh
Latest Month
1.1M MWh
Annual Generation
16.4%
Capacity Factor
Financial DataBeta
Source: FERC Electric Quarterly Reports, LBNL Utility-Scale SolarHIGH
$14.4/MWh
PPA Price
Sonoran Solar Energy, LLC
Contract Seller
Per-Unit Cost Trends
Pricing & Market Data
This plant is outside organized wholesale electricity markets (ISOs/RTOs). Nodal pricing data is not available.
News & Articles (10)Beta
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The Alamosa News·2 weeks ago
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AGDAILY·3 weeks ago
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NextEra Energy Defends $300M Solar Project Amid Tax Debate
NextEra Energy says Little Ashdown Solar will create construction jobs and tax revenue, while critics call it corporate welfare.
Arkansas Business·1 months ago
Last updated 2026-03-26
View all 10 articles