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20 MW Batteries (10 MW) + Solar Photovoltaic (10 MW) operating in Maricopa, AZ — Arizona Public Service Company
20 MW
Nameplate Capacity
2
Generators
units
Hybrid (2)
Technology
Batteries + Solar Photovoltaic
2015
Operating Since
Coordinates
33.1450, -112.6600
County
Maricopa, AZ
Nearby Plants
| Field | EIA | GEM | Wikidata |
|---|---|---|---|
| Operator | Arizona Public Service Co | Arizona Public Service | — |
| Owner(s) | Arizona Public Service Co | Pinnacle West Capital | — |
| Status | Operating | operating | — |
Desert Star Hybrid is a 20 MW hybrid power plant located in Maricopa County, Arizona. The facility, which began operating in 2015, is owned by Pinnacle West Capital and operated by Arizona Public Service Company (APS). The plant utilizes both solar photovoltaic technology with single-axis tracking and battery energy storage. The battery energy storage system (BESS) has a capacity of 30 MWh, providing a duration of 3 hours and employing lithium-ion battery (LIB) chemistry. The plant's primary fuel type is listed as "MWH."
Desert Star Hybrid operates within the Arizona Public Service Company balancing authority and the Western Electricity Coordinating Council (WECC) NERC region. In the most recent year of data, the plant generated 29,163 MWh, achieving a capacity factor of 16.6%. The installed cost of the plant was $3,259.75 per kW, according to FERC data. Desert Star Hybrid ranks as the 65th largest power plant out of 68 in Arizona, and 699th out of 1205 nationally.
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
12.0 kV
Regulatory Status
RE — Regulated
Entity Type
Investor-Owned Utility
Sector
Electric Utility
1.6K MWh
Net Discharge
29.2K MWh
Annual Net Energy
16.6%
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.
Data from 2015–2024
$11.2/MWh
Energy Value
$25.7/MWh
Capacity Value
Annual Capital & Operating Expenses
Cumulative Installed Cost
Per-Unit Cost Trends
This plant's balancing authority participates in CAISO's Western Energy Imbalance Market (WEIM). Direct nodal pricing data is not yet available.
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