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34 MW Batteries (17 MW) + Solar Photovoltaic (17 MW) operating in Maricopa, AZ — Arizona Public Service Company
34 MW
Nameplate Capacity
2
Generators
units
Hybrid (2)
Technology
Batteries + Solar Photovoltaic
2011
Operating Since
Coordinates
33.0347, -112.6617
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 | — |
Cotton Center Solar Hybrid is a 34 MW hybrid power plant located in Maricopa County, Arizona. The plant, which began operating in 2011, is owned by Pinnacle West Capital and operated by Arizona Public Service Co. It utilizes both solar photovoltaic technology and batteries, with a 51 MWh battery energy storage system (BESS) providing 3 hours of duration. The BESS uses lithium-ion (LIB) chemistry. The solar array employs single-axis tracking. The plant is ranked 60th out of 68 power plants in Arizona and 645th out of 1205 nationally.
The plant's primary fuel is listed as MWH. In the most recent year of data, Cotton Center Solar Hybrid generated 36,492 MWh, resulting in a capacity factor of 12.2%. The plant operates within the Arizona Public Service Company balancing authority and the Western Electricity Coordinating Council (WECC) NERC region. Financial data indicates an installed cost of $4,735.69 per kW.
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
12.5 kV
Regulatory Status
RE — Regulated
Entity Type
Investor-Owned Utility
Sector
Electric Utility
1.3K MWh
Net Discharge
36.5K MWh
Annual Net Energy
12.2%
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 2011–2024
$10.6/MWh
Energy Value
$24.8/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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