Sun Streams 3

OperatingBESSSolarHybrid

Ranked #16 of 55 BESS plants in AZ#54 of 837 nationally

430 MW Batteries (215 MW) + Solar Photovoltaic (215 MW) operating in Maricopa, AZ — Arizona Public Service Company

EIAGEM

430 MW

Nameplate Capacity

Generators

units

Hybrid (2)

Technology

Batteries + Solar Photovoltaic

2024

Operating Since

Location

Coordinates

33.3317, -112.8119

County

Maricopa, AZ

Nearby Plants

Sun Streams 2
Solar150 MW · 1.2 km
Red Hawk
Natural Gas1127 MW · 2.7 km
Agave
BESS300 MW · 2.7 km

Ownership & Operator

Field	EIA	GEM	Wikidata
Operator	Sun Streams PVS, LLC	—	—
Owner(s)	Sun Streams PVS, LLC	—	—
Status	Operating	operating	—

Ownership Chain

No GEM tracker match for this plant — ownership chain unavailable.

About

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

EIA Plant Profile Global Energy Monitor

Engineering & Generators

Grid Context

NERC Region

WECC

Balancing Authority

Arizona Public Service Company

Grid Voltage

525 kV

Regulatory Status

Entity Type

Independent Power Producer

Sector

IPP Non-CHP

Generation

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.

Financial DataBeta

Source: FERC Electric Quarterly Reports, LBNL Utility-Scale SolarHIGH

$25.0/MWh

PPA Price

Sun Streams PVS, 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