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84.9 MW Batteries (41 MW) + Solar Photovoltaic (44 MW) operating in Maricopa, AZ
84.9 MW
Nameplate Capacity
2
Generators
units
Hybrid (2)
Technology
Batteries + Solar Photovoltaic
2017
Operating Since
Coordinates
32.5510, -111.2892
County
Maricopa, AZ
Nearby Plants
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| Field | EIA | GEM | Wikidata |
|---|---|---|---|
| Operator | Arizona Public Service Co | Arizona Public Service | — |
| Owner(s) | Arizona Public Service Co | Pinnacle West Capital | — |
| Status | Operating | operating | — |
Located in Maricopa County, Arizona, the Red Rock power plant is a hybrid solar and battery energy storage system (BESS) facility with a total capacity of 84.9 MW. The plant began operating in 2017 and is owned by Pinnacle West Capital, with Arizona Public Service Co. (APS) serving as the operator. The facility utilizes both solar photovoltaic technology with single-axis tracking and battery storage. The battery energy storage system has a capacity of 164 MWh and a duration of 4 hours, employing lithium-ion battery chemistry. Red Rock ranks as the 50th largest power plant in Arizona out of 68, and 532nd nationally out of 1205.
Red Rock operates within the Arizona Public Service Company balancing authority and the Western Electricity Coordinating Council (WECC) NERC region. The plant's latest annual generation was 85,866 MWh, resulting in a capacity factor of 11.5%. Financial data indicates an installed cost of $2,288.8 per kW, based on FERC filings. The plant has been the subject of 10 news articles, with 9 focused on industry topics and 1 on grid-related matters. The plant's primary fuel is listed as MWH, reflecting its reliance on solar energy and battery storage.
Generated from EIA, GEM, and public data sources
Grid Region
Mountain West
Market
WEIM Participant
NERC Region
WECC — Western Electricity Coordinating Council
Balancing Authority
Arizona Public Service Company (AZPS)
Grid Voltage
115.0 kV
Regulatory Status
RE — Regulated
Entity Type
Investor-Owned Utility
Sector
Electric Utility
Monthly net generation as reported to EIA-923 — useful for historical context. Confidence varies sharply by fuel type; the band above and the “About this data” button explain the caveats specific to this plant and how InfraSure’s in-house model handles them.
6.2K MWh
Latest Month
85.9K MWh
Annual Generation
11.5%
Capacity Factor
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Data from 2016–2024
$10.4/MWh
Energy Value
$21.1/MWh
Capacity Value
Annual Capital & Operating Expenses
Cumulative Installed Cost
Per-Unit Cost Trends
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This plant's balancing authority participates in CAISO's Western Energy Imbalance Market (WEIM). Direct nodal pricing data is not yet available.
No wholesale contracts disclosed in FERC EQR for this plant.
FERC EQR captures bilateral wholesale energy + capacity contracts ≥$1M/yr filed quarterly by jurisdictional sellers — covers renewable PPAs, thermal energy sales agreements, capacity contracts, and tolling agreements alike. Many plants don't appear: regulated-utility output flows to ratepayers via cost-of-service rather than bilateral contracts; small projects fall below the filing threshold; tax-equity-financed renewables route offtake to investors not utilities; merchant plants sell into ISO clearing markets without bilateral contracts. News-extracted buyer facts (below) may surface contracts disclosed only through announcements.
Last updated 2026-03-14
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