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750 MW Batteries (260 MW) + Solar Photovoltaic (490 MW) operating in Maricopa, AZ — Salt River Project
750 MW
Nameplate Capacity
2
Generators
units
Hybrid (2)
Technology
Batteries + Solar Photovoltaic
2023
Operating Since
Coordinates
33.2488, -112.5424
County
Maricopa, AZ
Nearby Plants
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 | — |
| Owner(s) | Sonoran Solar Energy, LLC | NextEra Energy | — |
| Status | Operating | operating | — |
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
Grid Region
Mountain West
Market
WEIM Participant
NERC Region
WECC — Western Electricity Coordinating Council
Balancing Authority
56.0K MWh
Latest Month
1.1M MWh
Annual Generation
16.4%
Capacity Factor
Sonoran Solar Energy, LLC · Data from 2023–2025
$14.4/MWh
PPA Price
This plant's balancing authority participates in CAISO's Western Energy Imbalance Market (WEIM). Direct nodal pricing data is not yet available.
Last updated 2026-03-26
View all articlesSalt River Project (SRP)
Grid Voltage
500.0 kV
Regulatory Status
NR — Non-Regulated
Entity Type
Independent Power Producer
Sector
IPP Non-CHP
Top 10 solar states
Data tables and metrics from the powerplantsinfo.org database.