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
NERC Region
WECC
Balancing Authority
Arizona Public Service Company
Grid Voltage
12.5 kV
Regulatory Status
RE
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.
$4,883/kW
Installed Cost
Arizona Public Service Company
Reporting Utility
Cumulative Installed Cost
Per-Unit Cost Trends
This plant is outside organized wholesale electricity markets (ISOs/RTOs). Nodal pricing data is not available.
APS seeks license extension for Palo Verde Nuclear Plant
Arizona Public Service (APS) plans to renew operating licenses for all three units at Palo Verde Generating Station, extending operations to the mid-2060s, ensuring continued energy supply.
DOE nixes $1.8B loan to Arizona Public Service for transmission, renewables and storage
Additional de-obligations are in process but cannot be publicly disclosed until finalized,” said Olivia Tinari, deputy press secretary for...
Last updated 2026-03-25
View all articles