How big is McFarland C?

McFarland C has a reported capacity of 185 MW and an energy capacity of 740 MWh. Source: EIA Form 860.

What kind of plant is McFarland C?

McFarland C is a batteries facility in Yuma County, AZ, participating in the CAISO market.

Where is McFarland C located?

McFarland C is in Yuma County, AZ, inside the CAISO balancing area.

Who operates McFarland C?

McFarland C is operated by AES Clean Energy according to the EIA generator inventory. Reporting membership does not by itself establish ultimate ownership.

How much electricity does McFarland C generate?

McFarland C reported 174.7 GWh over the twelve months to 2026-04. For a storage plant this is reported gross generation — a discharge proxy, not a cycle count or a conventional capacity factor.

Where does McFarland C connect to the grid?

McFarland C interconnects at Hoodoo Wash 500 kV Switchyard, on the Arizona Public Service Company (APS) as designated interconnection/transmission filer; the Hoodoo Wash switchyard is co-owned by APS, SDG&E, and IID. system.

How does McFarland C compare to other plants?

By capacity, McFarland C ranks #72 of 962 operating plants of the same technology nationally. It ranks #14 of 47 in AZ.

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BatteriesCAISO · Yuma County

McFarland C

AES Clean Energy · Yuma County · CAISO

McFarland C is a battery energy storage facility with 185 MW of EIA-reported operating capacity and 740 MWh of reported energy capacity in Yuma County, Arizona, registered as EIA Plant ID 67498. AES Clean Energy owns and operates the plant, a subsidiary of The AES Corporation. The facility interconnects at Hoodoo Wash 500 kV Switchyard at 500 kV. Its grid role is grid-scale, four-hour lithium-ion energy-storage resource contracted to provide resource adequacy with financial settlement.

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plant:plant-67498

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Investigate technology, capacity, output, price behavior, ownership, and related facilities using this profile plus current grid data.

Overview

Key fields

Power / energy: 185 MW / 740 MWh
Reported plant capacity and configuration.
Technology: Batteries
Primary generation technology.
Registry anchor: Plant 67498
AES Clean Energy · Yuma County · CAISO
Storage duration: 4 hours
Battery subsystem rating.
Operating status: Operating
McFarland C is operating.
Grid connection: Hoodoo Wash 500 kV Switchyard
500 kV · Arizona Public Service Company (APS) as designated interconnection/transmission filer; the Hoodoo Wash switchyard is co-owned by APS, SDG&E, and IID.

Profile

Grid role: Grid-scale, four-hour lithium-ion energy-storage resource contracted to provide resource adequacy with financial settlement.
Grid connection: Hoodoo Wash 500 kV Switchyard · 500 kV · Arizona Public Service Company (APS) as designated interconnection/transmission filer; the Hoodoo Wash switchyard is co-owned by APS, SDG&E, and IID.
Physical build: Operating 185 MW, four-hour, transmission-connected lithium-ion battery energy storage facility at McFarland C in Yuma County, Arizona. EIA data lists one operational generating unit; no exact-asset source identifies installed battery-unit, container, PCS/inverter, module/panel, OEM, or model counts.

Structured profile

Reported capacity: 185 MW
Batteries
Energy: 740 MWh
4-hour storage duration
Operating status: operating
McFarland C is operating.
Interconnection: Hoodoo Wash 500 kV Switchyard
500 kV · Arizona Public Service Company (APS) as designated interconnection/transmission filer; the Hoodoo Wash switchyard is co-owned by APS, SDG&E, and IID.

Units and generators

Operating generator records and technology attributes reported through EIA-860.

Generator	Capacity	Technology	Operation	Status
MCFRC	185 MW 185 MW summer	Batteries Electricity used for energy storage · BA	May 2025	Operating

Performance

Monthly EIA generation history and recent market-resource behavior where linked telemetry is available.

Peer context

Technology capacity: 185 MW
National rank: #72
AZ rank: #14

Monthly generation

Download CSV

Latest 12 months

174.7 GWh

Reported gross generation

Latest report

Apr 2026

EIA-923 monthly filing

Grid and market context

Deterministic links to ERCOT market resources, price records, outage disclosures, queue records, and nearby infrastructure. Candidate joins remain labeled until corroborated.

Nearby substations

HIFLD infrastructure inventory

HOODOO WASH

IN SERVICE · 500 kV

0.9 km

UNKNOWN303427

Commercial, land, and environmental record

Source-backed project transactions, agreements, land records, permits, and environmental disclosures. Portfolio and adjacent-project facts remain explicitly scoped.

Financing

Offtake Contract Approval

Mar 21, 2024

California Public Utilities Commission Resolution E-5309 approved Southern California Edison's mid-term reliability contract for McFarland C on March 21, 2024. Contract covers 185 MW nameplate capacity and 139 MW incremental September NQC, with initial delivery date June 1, 2025 and contract term June 1, 2025 through May 31, 2045 (20 years). Resource adequacy capacity with financial settlement; no transaction amount disclosed.

185 MW contracted20 yearsMcFarland Storage C, LLC · Southern California Edison Company

Source

Tax Equity Ownership Structure

Date not disclosed

AES disclosed that McFarland C is owned with third-party tax equity investors holding variable ownership interests who receive a portion of the project's economic and tax attributes. No investor names, financing amount, or tax-equity closing date disclosed.

The AES Corporation · Third-party tax equity investors

Source

Land and environmental record

Historical Parcel Identifiers (Name-Matched)

Nov 21, 2016

APNs 165-04-004, 165-04-005, 165-04-006 through 165-04-013, 165-09-006, and 165-03-007 through 165-03-010; portions of Replat of Dateland Ranch.

Yuma County SUP16-07 legal description lists 15 parcel identifiers for the McFarland C Solar site recorded in Dateland Ranch replat. Record does not establish current ownership or title for the 185 MW battery asset.

Exhibit A

Historical Site Acreage (Name-Matched)

Jun 2016

Approximately 600 gross acres

Yuma County Special Use Permit SUP16-07 (2016) for McFarland C Solar describes approximately 600 acres of previously disturbed, undeveloped private agricultural land in Dateland. This is a 2016 solar-site record and is not independently confirmed as the current 185 MW battery's exclusive footprint.

Special Use Permit Application

Historical Site Zoning And Land-Use Classification

2016

Rural Area RA-40 zoning; Agriculture/Rural Preservation planned land use; historically agricultural private land.

McFarland C Solar SUP16-07 (2016) states the site is zoned RA-40, with Agriculture/Rural Preservation planned use, on private land historically used for agriculture, approximately 65 miles east of Yuma, south of Palomas/Hyder Road across from Hoodoo Wash Substation.

Special Use Permit Application

Historical Water-Use Estimate (Construction And Operations)

2016

Construction: up to 162 acre-feet; Operations: approximately 5 acre-feet per year.

McFarland C Solar SUP application (2016) projected up to 162 acre-feet for construction, dust control, module washing, sanitary use, and approximately 5 acre-feet per year for domestic, process water, and fire protection. Water sourced from on-site wells or trucked; portable toilets and holding tanks for sanitary facilities. These figures are from the solar-site application, not separately established for the battery configuration.

Special Use Permit Application

Related parties and identifiers

Parties, market resources, and identifiers tied to this asset, with owner, operator, developer, EPC, compliance provider, and interconnecting entity roles kept separate.

Relationship graph

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AssetOwner / operatorFinancierOfftaker

Timeline and sources

Project milestones and public references behind the asset profile.

Project timeline

Jun 21, 2016
Jun 21, 2016
Original predecessor development applicationSpecial Use...
Sustainable Power Group, doing business as McFarland Solar, LLC, submitted a Yuma County special-use-permit application for the proposed McFarland C Solar Project, described as a utility-scale solar facility of up to 100 MW.
2017

Reporting portfolio

EIA reporting entity

AES Clean Energy

Entity 64904

Operating portfolio

48 plants

15 states

Reported capacity

4,273.7 MW

Batteries · Onshore Wind Turbine · Solar Photovoltaic

Largest reported plants in this portfolio
Largest reported plants	Capacity	State
Rexford Solar Farm	540 MW	CA
McFarland B Solar and Storage	450 MW	AZ
McFarland A Solar and Storage	300 MW	AZ
Morris Solar	250 MW	MO
Chevelon Butte Wind Farm	238.2 MW	AZ
Baldy Mesa Solar & Storage	225 MW	CA
Chevelon Butte Phase 2	216 MW	AZ
Raceway Solar & Storage	205 MW	CA

Portfolio membership follows the latest EIA-860 reporting entity. It does not imply ultimate ownership.

View full reporting portfolio

McFarland C

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McFarland C

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Overview

Key fields

Profile

Structured profile

Units and generators

Performance

Peer context

Monthly generation

Grid and market context

Nearby substations

Commercial, land, and environmental record

Financing

Land and environmental record

Related parties and identifiers

Relationship graph

Timeline and sources

Project timeline

Parties and identifiers

Reporting portfolio

Sources

Common questions about McFarland C

How big is McFarland C?

What kind of plant is McFarland C?

Where is McFarland C located?

Who operates McFarland C?

How much electricity does McFarland C generate?

Where does McFarland C connect to the grid?

How does McFarland C compare to other plants?

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