Notrees Windpower Hybrid is a hybrid wind and battery storage facility with 188.5 MW of EIA-reported operating capacity and 24 MWh of reported storage energy capacity in Ector County, Texas, registered as EIA Plant ID 56961. Commercial operation began in April 2009.
Reported plant capacity and configuration.
Primary generation technology.
Ector County · ERCOT
Battery subsystem rating.
Notrees Windpower Hybrid is operating.
Best-supported operating milestone.
NWF_ESR1 · NWF_NWF1 · NWF_NWF2
Separate operating technologies
0.7-hour storage duration
Notrees Windpower Hybrid is operating.
ERCOT
Similar plants ranked by technology, capacity, and distance.
Operating generator records and technology attributes reported through EIA-860.
| Generator | Capacity | Technology | Operation | Status |
|---|---|---|---|---|
| BATT | 36 MW 36 MW summer | Batteries Electricity used for energy storage · BA | Dec 2012 | Operating |
| GE | 60 MW 60 MW summer | Onshore Wind Turbine Wind · WT | Apr 2009 | Operating |
| VESTA | 92.5 MW 92.5 MW summer | Onshore Wind Turbine Wind · WT | Apr 2009 | 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.
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.
Duke Energy announced plans in late 2009 to match a $22 million grant from the U.S. Department of Energy (ARRA) to support installation of large-scale batteries at the Notrees wind site.
ERCOT · Ector County
Global Energy Monitor (which cites EIA/EIA-860 data) lists the owner as Duke Energy Corp [100%], and Duke Energy's own press release refers to the Notrees Windpower Project as a Duke Energy Renewables asset. These statements together support naming Duke Energy (Duke Energy Corporation) as the public owner.
The best-supported single-date for the plant's initial commercial operation (first unit online) is therefore 2009-04-01.
Monthly generation is reported through EIA-923. Capacity factor uses the current EIA nameplate capacity and is shown only for complete calendar years.
3 ERCOT market resources · Battery / storage, Wind
Cycles/day is discharged energy vs. usable capacity (~6 MWh). Capacity factor is avg discharge vs. peak.
Observed ERCOT settlement prices at NWF_NWF1 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 and any physical dispatch constraint. 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.
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Portfolio membership follows the latest EIA-860 reporting entity. It does not imply ultimate ownership.
View full reporting portfolioEIA-860 lists generator GE, generator VESTA with this operating date.
EIA record reports the plant’s first unit entered service on April 1, 2009; the project is listed as an operational EIA plant (Plant ID 56961).
The 36 MW battery energy storage and power management system completed testing and became fully operational in December 2012.
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.
Notrees Windpower Hybrid has a reported capacity of 188.5 MW. Source: EIA Form 860.
Notrees Windpower Hybrid is a Batteries; Onshore Wind Turbine; facility in Ector County, TX, participating in the ERCOT market.
Notrees Windpower Hybrid is in Ector County, TX, inside the ERCOT balancing area.
Notrees Windpower Hybrid is operated by Duke Energy Renewables Services according to the EIA generator inventory. Reporting membership does not by itself establish ultimate ownership.
Notrees Windpower Hybrid reports a commercial operation date of 2009-04-01. Current status: operating. Source: EIA Form 860.
Notrees Windpower Hybrid reported 217 GWh over the twelve months to 2026-06. Figures are net generation as filed to EIA-923.
Notrees Windpower Hybrid settles at NWF_NWF1, interconnects at Notrees substation.
By capacity, Notrees Windpower Hybrid ranks #429 of 1,362 operating plants of the same technology nationally. It ranks #140 of 228 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.
