# Notrees Windpower Hybrid

ERCOT asset profile · https://askthegrid.com/assets/facilities/notrees-windpower-hybrid

Ector County · ERCOT

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.

## Profile

- **Grid role:** Utility-scale wind generation in ERCOT's energy-only market.
- **Physical build:** Notrees Windpower Hybrid (EIA Plant 56961) is a hybrid wind + battery site comprising multiple wind turbine strings and an on-site battery energy storage system: 55 Vestas V82 turbines (1.65 MW each), one Vestas 1-V90 experimental turbine (≈1.86 MW), 40 GE 1.5-MW turbines, and a 36 MW / 24 MWh Xtreme Power Dynamic Power Resource composed of 24 Dynamic Power Modules (each 1.5 MW / 1.0 MWh) with one Power Unit (PCS) per module. The DPR modules were installed inside a building (not in shipping containers) on site.

## Metrics

- **Generation / storage:** 188.5 MW total / 24 MWh storage — Reported plant capacity and configuration.
- **Technology:** Wind + battery storage — Primary generation technology.
- **Registry anchor:** Plant 56961 — Ector County · ERCOT
- **Storage duration:** 0.7 hours — Battery subsystem rating.
- **Operating status:** Operating — Notrees Windpower Hybrid is operating.
- **Commercial operation:** April 2009 — Best-supported operating milestone.
- **Resource stack:** 3 resources — NWF_ESR1 · NWF_NWF1 · NWF_NWF2

## Facts

- **Reported capacity:** 153 MW wind + 36 MW storage — Separate operating technologies · confidence: high
- **Energy:** 24 MWh — 0.7-hour storage duration · confidence: medium
- **Operating status:** operating — Notrees Windpower Hybrid is operating. · confidence: medium
- **Location:** Ector County — ERCOT · confidence: high
- **Asset role:** wind — ERCOT · Ector County
- **Owner:** Duke Energy (Duke Energy Corporation) — 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. · confidence: high
- **Commercial operation:** 2009-04-01 — The best-supported single-date for the plant's initial commercial operation (first unit online) is therefore 2009-04-01. · confidence: medium

## Sources

- [Duke Energy Notrees Wind Storage Demonstration Project](https://www.energy.gov/sites/prod/files/2016/10/f33/OE0000195_Duke_FinalRep_Nov_2015.pdf) — energy.gov · regulatory — by DENW Storage · 2015 · Cited by 8 — Duke Energy Renewables owns and operates the Notrees Wind Farm in west Texas's Ector and. Winkler counties. Settlement meter installed at the wind farm point
- [Duke Energy Notrees Wind Storage Demonstration Project...](https://www.osti.gov/biblio/1369566) — osti.gov · regulatory — 55 Vestas V82 turbines, one Vestas 1-V90 experimental turbine, and 40 GE 1.5-MW turbines
- [DOE Peer Review - Notrees Energy Storage Project](https://www.sandia.gov/ess-ssl/docs/pr_conferences/2014/Friday/Session9/05_Gates_Jeff_Duke_Notrees.pdf) — sandia.gov · regulatory — Apr 13, 2013 — The Notrees substation is metered at several different feeders: BESS meter includes house loads. • 1-minute interval data for power, frequency,
- [Combo & Single Model ESR Names](https://www.ercot.com/files/docs/2025/02/14/single-model-esr-names_16Jun2025.xlsx) — ercot.com · regulatory — Feb 14, 2025 — The Single Model Energy Strorage Resource Names ・ live ---- are determined by ERCOT ・ 1 ESR1 NWF_ESR1 45687
- [MORA July 2026](https://ercot.com/files/docs/2026/05/01/MORA_July2026.pdf) — ercot.com · regulatory — 724 NOTREES WIND 1 NWF_NWF1 WINKLER WIND-O WEST 2009 92.6

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Canonical page: https://askthegrid.com/assets/facilities/notrees-windpower-hybrid

Profile published: 2026-07-17T03:34:36.105Z
Source: Ask the Grid — https://askthegrid.com/