Cunningham Storage
Rayburn County Electric Cooperative · Hunt County · ERCOT
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.
Overview
Key fields
- Power / energy
- 190 MW / 380 MWh
Reported plant capacity and configuration.
- Technology
- Batteries
Primary generation technology.
- Registry anchor
- Plant 65410
Acciona Energy USA Global, LLC · Hunt County · ERCOT
- Storage duration
- 2 hours
Battery subsystem rating.
- Operating status
- Operating
Cunningham Storage is operating.
Equipment
- 159 containers
Installed equipment documented in public project records.
- Commercial operation
- 2023
Best-supported operating milestone.
- Resource stack
- 1 resource
TURQBESS_ESR1
Profile
- Grid role
- storage arbitrage, peaking, grid stability, ancillary services
- Context
- ACCIONA stated the 190 MW / 380 MWh Cunningham facility would be the largest operating battery energy storage project on the Texas grid upon commissioning (ACCIONA press release, Dec 13, 2022).
- Physical build
- 190 MW / 380 MWh battery energy storage system consisting of 159 cabinets (cabinetized BESS blocks) of 2.4 MWh each (manufactured by Sungrow) using liquid-cooled cells supplied by CATL.
Structured profile
- Reported capacity
- 190 MW
Batteries
- Energy
- 380 MWh
2-hour storage duration
- Commercial operation
- 2023
- Operating status
- operating
Cunningham Storage is operating.
- Location
- Hunt County
ERCOT
- Owner
- ACCIONA Energía
These together support listing ACCIONA Energía as the public owner name.
Units and generators
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 |
Performance
Monthly EIA generation history and recent market-resource behavior where linked telemetry is available.
Peer context
- Technology capacity
- 190 MW
- National rank
- #71
- TX rank
- #27
Monthly generation
Download CSVEIA-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.
ERCOT disclosed dispatch
1 ERCOT market resource · Battery / storage
Dispatch
3 mo through May 21, 2026Cycles/day is discharged energy vs. usable capacity (~411 MWh). Capacity factor is avg discharge vs. peak.
Output by hourlocal time · 90 days through May 21, 2026
Latest disclosed outputhourly · 2 weeks ending May 21, 2026
Generation from ERCOT's 60-Day SCED Disclosure (≈60-day lag), summed over this site's market resources.
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.
Market registration
ERCOT public disclosuresOperating context
ERCOT market recordsNearby substations
HIFLD infrastructure inventoryCommercial, land, and environmental record
Source-backed project transactions, agreements, land records, permits, and environmental disclosures. Portfolio and adjacent-project facts remain explicitly scoped.
Land and environmental record
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
Drag organizations to explore the network. Select a node to pin its details and available page link.
Parties and identifiers
| Relationship | Entity | Basis |
|---|---|---|
| Owner / operator | Owner / operator for Cunningham Storage | |
| Battery supplier | Battery supplier for Cunningham Storage | |
| Optimizer | Optimizer for Cunningham Storage | |
| Market resources | TURQBESS_ESR1 | Linked ERCOT resources. |
| Grid selection | plant:plant-65410 | Canonical asset page /ercot/assets/plant/cunningham-storage. |
Reporting portfolio
| 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 portfolioTimeline and sources
Project milestones and public references behind the asset profile.
Project timeline
- Qcells acquisition (developer period)Q CELLS Acq...
Qcells USA announced acquisition/ownership of the Cunningham Energy Storage project (Qcells press release, Dec 13, 2021).
- Construction financing (corporate revolver supporting construction)Qcells Clos...
Qcells USA closed a $150 million corporate revolver intended in part to support construction of the Cunningham project (Qcells announcement, Sep 8, 2022).
- Project sale / acquisition by ACCIONA EnergíaAcciona buy...
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).
- Commercial operation / commissioningAcciona buy...
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.
- Generator enters operationEIA-860
EIA-860 lists generator SPUT with this operating date.
- Asset Optimization AppointmentHabitat Ene...
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).
- Latest disclosed generation interval
ERCOT SCED disclosure is delayed, so plant performance windows end at the latest disclosed interval.
Sources
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