Space City Solar
609.74 MW generation in Wharton, TX · In queue since November 2019 · Proposed COD June 2027
609.74 MW
Capacity
1
Components
Solar
6y 6m
In Queue
IA Executed
IA Status
Signed Jan 2021
Queue → IA
1y 2m
IA → COD
6y 5m
Total Duration
1y 2m
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: 12–24 months
Proposed COD: 2027-06-01
Space City Solar is a proposed 609.74 MW solar generation project located in Wharton County, Texas. Developed by Apollo Solar Ranch, LLC, the project consists entirely of solar photovoltaic generation. It is currently active in the ERCOT interconnection queue as entry ERCOT-21INR0341, with a queue entry date of November 1, 2019. The project's proposed commercial operation date is June 1, 2027, and its Interconnection Agreement (IA) was executed on January 6, 2021.
The point of interconnection for Space City Solar is the 44200 Hillje 345kV substation. The project has been the subject of recent news coverage, with 13 articles categorized as pertaining to industry and regulatory matters.
Generated from interconnection queue and public data sources
State
TX
County
Wharton
Grid Region
ERCOT (Texas)
Market
ISO/RTO Member
Developer
Apollo Solar Ranch, LLC
Utility
—
Entity
ERCOT
Service Type
—
Point of Interconnection
44200 Hillje 345kV
Data Source
LBNL + Live
- ISO / RTO
- ERCOT
- Trading Hub
- HB_HOUSTON
- Hub Confidence
- MEDIUM
- POI Substation
- Hillje 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
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