Cotton Center Solar Hybrid

OperatingBESSSolarHybrid

Ranked #49 of 55 BESS plants in AZ#432 of 837 nationally

34 MW Batteries (17 MW) + Solar Photovoltaic (17 MW) operating in Maricopa, AZ — Arizona Public Service Company

EIAGEMWD

34 MW

Nameplate Capacity

2

Generators

units

Hybrid (2)

Technology

Batteries + Solar Photovoltaic

2011

Operating Since

Location

Coordinates

33.0347, -112.6617

County

Maricopa, AZ

Nearby Plants

Stratford Solar Center, LLC
Solar15 MW · 0.2 km
Palaau Power Hybrid
Distillate Oil17.1 MW · 1.1 km
Paloma Solar Hybrid
BESS34 MW · 1.5 km

Ownership & Operator

Field	EIA	GEM	Wikidata
Operator	Arizona Public Service Co	Arizona Public Service	—
Owner(s)	Arizona Public Service Co	Pinnacle West Capital	—
Status	Operating	operating	—

Ownership Chain

About

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

EIA Plant Profile Wikidata Global Energy Monitor

Engineering & Generators

Grid Context

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

Generation

1.3K MWh

Net Discharge

36.5K MWh

Annual Net Energy

12.2%

Capacity Factor

Jan 2022 – Dec 2024

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 Form 1, LBNL Utility-Scale SolarHIGH

$4,883/kW

Installed Cost

Arizona Public Service Company

Reporting Utility

Cumulative Installed Cost

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 (2)Beta

Regulatory·permitting

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.

APS (operator)

Power Engineering·1 weeks ago