Desert Willow BESS
154.4 MW storage in Ellis, TX · In queue since February 2021 · Proposed COD March 2025
154.4 MW
Capacity
1
Components
Battery
5y 3m
In Queue
IA Executed
IA Status
Signed May 2023
Queue → IA
2y 3m
IA → COD
1y 10m
Total Duration
2y 3m
Schedule
13 months past proposed COD
Interconnection request submitted to ISO/RTO
ERCOT uses a serial "connect and manage" approach — fastest among major ISOs.
Typical: 18–30 months (fastest major ISO)
Interconnection agreement executed — binding commitment to build
Typical: 30–60 days (negotiation)
Project under construction
Typical: 6–18 months
Proposed COD: 2025-03-31
The Desert Willow BESS project is a proposed 154.4 MW battery storage project located in Ellis County, Texas. Developed by Desert Willow Energy Storage, LLC, the project consists of 154.4 MW of battery capacity. It is listed in the ERCOT interconnection queue as entry ERCOT-23INR0195, with a queue entry date of February 4, 2021, and a proposed commercial operation date of March 31, 2025. The project's Interconnection Agreement (IA) was executed on May 15, 2023.
The Desert Willow BESS project is linked to the existing Desert Willow Energy Storage operating plant (EIA ID 67598). The point of interconnection is at tap 345kV 1906 Venus_S5 - 1916 LiggettA1_5. The project has appeared in recent news coverage.
Generated from interconnection queue and public data sources
State
TX
County
Ellis
Grid Region
ERCOT (Texas)
Market
ISO/RTO Member
Developer
Desert Willow Energy Storage, LLC
Utility
—
Entity
ERCOT
Service Type
—
Point of Interconnection
tap 345kV 1906 Venus_S5 - 1916 LiggettA1_5
Data Source
LBNL
- ISO / RTO
- ERCOT
- Trading Hub
- HB_NORTH
- Hub Confidence
- HIGH
- Nearest Node (Estimated)
- DSWL_BES1
This project's market context is estimated from its Point of Interconnection. Hub and node assignments are approximate and based on geographic inference from the POI substation name.
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