McFarland C
AES Clean EnergyYuma County
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.
Mapped infrastructure geometry associated with this asset.
Batteries
4-hour storage duration
McFarland C is operating.
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.
EIA plant 67498 · Inventory for Sep 2026.
| Generator | Technology | Status | Power (MW) | Energy (MWh) |
|---|---|---|---|---|
| MCFRC | Batteries | Operating | 185 | 740 |
The Hoodoo Wash transmission connection involves APS, SDG&E, and IID. CAISO’s McFarland A/B filing identifies their jointly owned switchyard. That transmission relationship does not establish SDG&E ownership of McFarland C or a power purchase agreement. The phases retain separate capacity records.
Similar plants ranked by technology, capacity, and distance.
Current generator records and technology attributes reported through EIA-860.
| Generator | Capacity | Technology | Operation | Status |
|---|---|---|---|---|
| MCFRC | 185 MW 185 MW summer | Batteries BA | May 2025 | Operating |
Monthly EIA generation history and recent market-resource behavior where linked telemetry is available.
Deterministic links to ERCOT market resources, price records, outage disclosures, queue records, and nearby infrastructure. Candidate joins remain labeled until corroborated.
Source-backed project transactions, agreements, land records, permits, and environmental disclosures. Portfolio and adjacent-project facts remain explicitly scoped.
Parties, market resources, and identifiers tied to this asset, with owner, operator, developer, EPC, compliance provider, and interconnecting entity roles kept separate.
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Project milestones and public references behind the asset profile.
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.
CAISO
CAISO · Yuma County
EIA-923 reports gross generation and net grid exchange for storage plants. Gross generation is shown as a discharge proxy; it is not a cycle count or conventional capacity factor.
| Largest reported plants | Capacity | State | |
|---|---|---|---|
| Rexford Solar Farm | 540 MW | CA | |
| West Camp Wind Farm | 500 MW | AZ | |
| 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 |
Portfolio membership follows the latest EIA-860 reporting entity. It does not imply ultimate ownership.
View full reporting portfolioThe 2016 permit schedule forecast construction during 2017–2018; the cited record does not establish that this schedule was completed or that the original solar configuration entered service.
AES and Alberta Investment Management Corporation agreed to acquire FTP Power LLC, doing business as sPower, from a majority-member affiliate of Fir Tree Partners, for $853 million in cash subject to adjustment plus assumption of $724 million of sPower non-recourse debt. This was a corporate sPower portfolio transaction, not a disclosed project-level McFarland C sale; closing was expected in the third quarter of 2017, but the actual closing month is not identified.
AES issued $900 million of 5.45% senior notes due 2028 and subsequently reported $176.8 million of the $887.6 million net proceeds allocated to McFarland C Storage, shown at 75% ownership and 185 MW.
California regulatory records documented SCE's 15-year resource-adequacy-with-financial-settlement contract for McFarland C, covering 185 MW of nameplate capacity, 139 MW of incremental September NQC, and an initial delivery date of June 1, 2025.
The Federal Energy Regulatory Commission published a supplemental notice concerning McFarland Storage C, LLC's initial market-based-rate application and request for blanket Section 204 authorization under docket ER24-2148-000.
EIA-860 lists generator MCFRC with this operating date.
Answered from the published record above. Questions whose inputs this profile does not carry are omitted rather than estimated.
The Hoodoo Wash transmission connection involves APS, SDG&E, and IID. CAISO’s McFarland A/B filing identifies their jointly owned switchyard. That transmission relationship does not establish SDG&E ownership of McFarland C or a power purchase agreement. The phases retain separate capacity records.
McFarland C reports 185 MW battery storage of operating nameplate capacity. These technology ratings do not establish a common export limit. Source: EIA Sep 2026.
McFarland C is a batteries facility in Yuma County, AZ, participating in the CAISO market.
McFarland C is in Yuma County, AZ, inside the CAISO balancing area.
McFarland C is operated by AES Clean Energy according to the EIA generator inventory. Reporting membership does not by itself establish ultimate ownership.
McFarland C reported 207.7 GWh over the twelve months to 2026-07. For a storage plant this is reported gross generation — a discharge proxy, not a cycle count or a conventional capacity factor.
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.
By capacity, McFarland C ranks #86 of 1,061 operating plants of the same technology nationally. It ranks #18 of 55 in AZ.
Plants within 25 km, nearest first, regardless of technology. Proximity is straight-line distance between mapped plant coordinates; it does not by itself establish a shared point of interconnection.
