Stonewall BESS
135 MW generation in Stonewall, TX · In queue since February 2025 · Proposed COD December 2028
135 MW
Capacity
1
Components
Battery
1y 5m
In Queue
Facility Study
IA Phase
COD target: 2028
Total Duration
3y 10m
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 not yet executed
Typical: 30–60 days (negotiation)
Proposed COD: 2028-12-29
Entered ERCOT interconnection queue in Facility Study phase
Proposed commercial operation date per ERCOT queue filing
The Stonewall BESS project is a proposed 135 MW hybrid battery energy storage system located in Stonewall County, Texas. Developed by Stonewall ESS, LLC, the project is interconnected within the ERCOT region under queue ID ERCOT-28INR0253. It entered the interconnection queue on February 25, 2025, with a proposed commercial operation date of December 29, 2028.
The proposed project is linked to the existing Stonewall BESS operating plant (EIA ID 68666).
Generated from interconnection queue and public data sources
Realization risk before commercial operation — cluster-study clearance, IA timing, counterparty mix, and withdrawal probability vs cohort. The diligence view that determines whether this project is worth pursuing. Powered by InfraSure's development-stage modeling stack.
See the full development-risk decomposition for this project.
State
TX
County
Stonewall
Grid Region
ERCOT (Texas)
Market
ISO/RTO Member
Developer
Stonewall ESS, LLC
Utility
—
Entity
ERCOT
Service Type
—
Point of Interconnection
tap 138kV 6150 SPUR4A - 6158 ASPM4A
Data Source
LBNL + Live
Composite operating-phase risk view — what this asset's risk profile would look like once it reaches commercial operation. Climate hazards across its operating life, expected generation variability, and offtake counterparty exposure, decomposed into a single decision-grade score. Powered by InfraRisk.
See the full risk decomposition + scenarios for this project.
Forward generation outlook — what this project would produce assuming it reaches commercial operation. Probabilistic ranges (P10/P50/P90) across weather, demand, and policy scenarios, conditioned on the proposed COD. Powered by InfraSure's generation modeling stack.
See the full forecast + scenario decomposition for this project.
Forward revenue, DSCR projection, and financing-close risk — conditioned on commercial operation. The bankability view that determines whether the deal clears its covenants once online. Powered by InfraSure's asset cashflow stack.
See the full revenue + DSCR projection for this project.
- ISO / RTO
- ERCOT
- Trading Hub
- HB_WEST
- Hub Confidence
- LOW
- POI Substation
- Peacock Substation
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.
No Ask reports yet for this entity.
Ask about Stonewall BESSForward forecasts, scenario decomposition, and risk-decision tooling for this queue project.
