Cunningham Storage is a battery energy storage facility with 190 MW of EIA-reported operating capacity and 380 MWh of reported energy capacity in Hunt County, Texas, registered as EIA Plant ID 65410. Acciona Energy USA Global, LLC is the registered plant entity or operator. Commercial operation began in 2023.
Reported plant capacity and configuration.
Primary generation technology.
Acciona Energy USA Global, LLC · Hunt County · ERCOT
Battery subsystem rating.
Cunningham Storage is operating.
Installed equipment documented in public project records.
Best-supported operating milestone.
TURQBESS_ESR1
Batteries
2-hour storage duration
Cunningham Storage is operating.
Similar plants ranked by technology, capacity, and distance.
Operating generator records and technology attributes reported through EIA-860.
| Generator | Capacity | Technology | Operation | Status |
|---|---|---|---|---|
| SPUT | 190 MW 190 MW summer | Batteries Electricity used for energy storage · BA | Aug 2023 | 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.
Qcells USA announced acquisition/ownership of the Cunningham Energy Storage project (Qcells press release, Dec 13, 2021).
ERCOT
These together support listing ACCIONA Energía as the public owner name.
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.
1 ERCOT market resource · Battery / storage
Cycles/day is discharged energy vs. usable capacity (~411 MWh). Capacity factor is avg discharge vs. peak.
Observed ERCOT settlement prices at TURQ_BESS1 over 363 days (2025-09-11 to 2026-09-10).
The TB2 figure is a price benchmark, not revenue: it values one perfect-foresight cycle per day between the 2 cheapest and 2 dearest hours of each day, gross of round-trip losses, and excludes ancillary services. It describes what this node’s price shape was worth over the window — it is not this asset’s realized capture, and no dispatch is assumed or modelled.
| Largest reported plants | Capacity | State | |
|---|---|---|---|
| Red Tailed Hawk Solar LLC | 360 MW | TX | |
| AEUG Union Solar, LLC | 325 MW | OH | |
| Fort Bend Solar LLC | 240 MW | TX | |
| La Chalupa, LLC | 198.5 MW | TX | |
| Cunningham StorageCurrent | 190 MW | TX | |
| Palmas Wind, LLC | 144.9 MW | TX | |
| High Point Solar LLC | 100 MW | IL | |
| San Roman Wind I, LLC | 95.3 MW | TX |
Portfolio membership follows the latest EIA-860 reporting entity. It does not imply ultimate ownership.
View full reporting portfolioQcells USA closed a $150 million corporate revolver intended in part to support construction of the Cunningham project (Qcells announcement, Sep 8, 2022).
ACCIONA Energía acquired the 190 MW / 380 MWh Cunningham Energy Storage project from Qcells USA; both companies announced the transaction on Dec 13, 2022 (press releases).
Sources report the project entered commercial service in 2023 — news reporting states commissioning in early 2023 while a project database lists commercial operation in August 2023.
EIA-860 lists generator SPUT with this operating date.
Habitat Energy was appointed by ACCIONA Energía to optimize and manage the 190 MW / 380 MWh Cunningham battery in ERCOT (Habitat Energy announcement, May 8, 2024).
ERCOT SCED disclosure is delayed, so plant performance windows end at the latest disclosed interval.
Answered from the published record above. Questions whose inputs this profile does not carry are omitted rather than estimated.
Cunningham Storage has a reported capacity of 190 MW and an energy capacity of 380 MWh. Source: EIA Form 860.
Cunningham Storage is a batteries facility in Hunt County, TX, participating in the ERCOT market.
Cunningham Storage is in Hunt County, TX, inside the ERCOT balancing area.
Cunningham Storage is operated by Acciona Energy USA Global, LLC according to the EIA generator inventory. Reporting membership does not by itself establish ultimate ownership.
Cunningham Storage reports a commercial operation date of 2023. Current status: operating. Source: EIA Form 860.
Cunningham Storage reported 102.7 GWh over the twelve months to 2026-06. For a storage plant this is reported gross generation — a discharge proxy, not a cycle count or a conventional capacity factor.
By capacity, Cunningham Storage ranks #71 of 962 operating plants of the same technology nationally. It ranks #27 of 223 in TX.
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.
