Panhandle Flagship Solar 1
439.4 MW hybrid in Carson, TX · In queue since March 2023 · Proposed COD June 2031
439.4 MW
Capacity
1
Components
Solar
3y 4m
In Queue
IA Executed
IA Phase
Signed Aug 2025
Queue → IA
2y 5m
IA → COD
5y 10m
Total Duration
2y 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 executed — binding commitment to build
Typical: 30–60 days (negotiation)
Project under construction
Typical: 18–30 months
Proposed COD: 2031-06-30
The Panhandle Flagship Solar 1 project is a proposed 439.4 MW solar generation facility in Carson County, Texas. The project, developed by Panhandle Solar Group Operating Company LLC, is located within the ERCOT region and interconnected to the 345 kV Railhead Substation. It entered the ERCOT interconnection queue as entry ERCOT-27INR0022 on March 13, 2023, with a proposed commercial operation date of June 30, 2031. The project's interconnection status is currently in the Facility Study phase.
The proposed project consists of 439.4 MW of solar photovoltaic generation. Recent news coverage indicates interest in the project's potential impact on the electric grid.
Generated from interconnection queue and public data sources
Realization risk from now to commercial operation — financing close, EPC and tax-equity counterparty mix, and COD probability vs the proposed date. The diligence view that determines whether the deal actually closes. Powered by InfraSure's development-stage modeling stack.
See the full development-risk decomposition for this project.
State
TX
County
Carson
Grid Region
ERCOT (Texas)
Market
ISO/RTO Member
Developer
Panhandle Solar Group Operating Company LLC
Utility
—
Entity
ERCOT
Service Type
—
Point of Interconnection
345 kV Railhead Substation (RAILHEAD #79005)
Data Source
LBNL + Live
Composite operating-phase risk view — what this asset's risk profile will look like once it commissions. 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 — first-year production estimate and 10-year P50 trajectory, with probabilistic ranges (P10/P50/P90) across weather, demand, and policy scenarios. 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. First-year DSCR, 10-year cashflow, and counterparty exposure across price and policy scenarios. 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
- MEDIUM
- POI Substation
- Railhead 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.
Last updated 2026-03-26
View all articlesTop solar plant owners in the US
Data tables and metrics from the InfraSure database.
Top solar plant owners in the US
Data tables and metrics from the InfraSure database.
Compare Texas vs California solar
Summary analysis with parallel narrative sections and visualizations.
Top 10 solar states
Data tables and metrics from the InfraSure database.
Forward forecasts, scenario decomposition, and risk-decision tooling for this queue project.
