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430 MW Batteries (215 MW) + Solar Photovoltaic (215 MW) operating in Maricopa, AZ — Arizona Public Service Company
430 MW
Nameplate Capacity
2
Generators
units
Hybrid (2)
Technology
Batteries + Solar Photovoltaic
2024
Operating Since
Coordinates
33.3317, -112.8119
County
Maricopa, AZ
Nearby Plants
| Field | EIA | GEM | Wikidata |
|---|---|---|---|
| Operator | Sun Streams PVS, LLC | — | — |
| Owner(s) | Sun Streams PVS, LLC | — | — |
| Status | Operating | operating | — |
Sun Streams 3 is a hybrid solar and battery energy storage system (BESS) power plant located in Maricopa County, Arizona. The plant has a total capacity of 430 MW and is operated by Sun Streams PVS, LLC. It commenced operations in 2024 and utilizes both solar photovoltaic technology and batteries for electricity generation. The facility consists of two generators and features single-axis solar tracking. The BESS component has a storage capacity of 860 MWh, providing a duration of 4 hours, and employs lithium-ion battery (LIB) chemistry. Sun Streams 3 ranks as the 20th largest power plant in Arizona out of 47, and 84th nationally out of 514.
The plant operates within the Arizona Public Service Company balancing authority and the Western Electricity Coordinating Council (WECC) NERC region. In its latest year of operation, Sun Streams 3 generated 493,451 MWh of electricity, achieving a capacity factor of 13.1%. Financial data indicates that the plant has a power purchase agreement (PPA) price of $25 per MWh. Information regarding the plant has been reported in 10 news articles, with a focus on grid-related topics (7 articles) and deals (3 articles).
Generated from EIA, GEM, and public data sources
Grid Region
Mountain West
Market
WEIM Participant
NERC Region
WECC — Western Electricity Coordinating Council
Balancing Authority
26.1K MWh
Net Discharge
493.5K MWh
Annual Net Energy
13.1%
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.
Sun Streams PVS, LLC · Data from 2024–2025
$25.0/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 articlesArizona Public Service Company (AZPS)
Grid Voltage
525.0 kV
Regulatory Status
NR — Non-Regulated
Entity Type
Independent Power Producer
Sector
IPP Non-CHP