Marshall Spring Solar
150 MW generation in Gillespie, TX · In queue since February 2023 · Proposed COD July 2026
150 MW
Capacity
1
Components
Solar
3y 3m
In Queue
Facility Study
IA Status
COD target: 2026
Total Duration
3y 5m
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: 2026-07-01
Marshall Spring Solar is a proposed 150 MW solar generation project located in Gillespie County, Texas. The project, developed by Marshall Springs Solar, LLC, is currently in the ERCOT interconnection queue as entry ERCOT-25INR0353, with a queue entry date of February 20, 2023. The proposed commercial operation date is July 1, 2026, and the project's interconnection agreement status is currently in the Facility Study phase.
The point of interconnection (POI) is planned at a new POI station between the 7132 L_GILLES8_1Y - 7126 L_FERGUS8_1Y 138kV line and the 7132 L_GILLES8_1Y - 7128 L_HORSBA8_1Y 138kV line, with both lines looped into the new POI station. The project has been mentioned in recent news coverage related to the energy industry.
Generated from interconnection queue and public data sources
State
TX
County
Gillespie
Grid Region
ERCOT (Texas)
Market
ISO/RTO Member
Developer
Marshall Springs Solar, LLC
Utility
—
Entity
ERCOT
Service Type
—
Point of Interconnection
New POI station between 7132 L_GILLES8_1Y - 7126 L_FERGUS8_1Y 138kV line and 7132 L_GILLES8_1Y - 7128 L_HORSBA8_1Y 138kV line, then loop in both lines into the new POI station.
Data Source
LBNL + Live
- ISO / RTO
- ERCOT
- Trading Hub
- HB_NORTH
- Hub Confidence
- LOW
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.
Last updated 2026-03-26
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