SOUTHERN SELECT ENERGY STORAGE
204.76 MW storage in Galveston, TX · In queue since October 2023 · Proposed COD March 2027
204.76 MW
Capacity
1
Components
Battery
2y 9m
In Queue
IA Executed
IA Phase
Signed May 2025
Queue → IA
1y 7m
IA → COD
1y 10m
Total Duration
1y 7m
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: 2027-03-31
The Southern Select Energy Storage project is a proposed 404.3 MW battery storage project located in Galveston County, Texas. The developer is Southern Select Energy Storage LLC. It is currently in the ERCOT interconnection queue as entry ERCOT-26INR0340, with a queue entry date of October 25, 2023, and a proposed commercial operation date of March 31, 2027. The project's interconnection agreement status is currently in the Facility Study phase.
The Southern Select Energy Storage project has been the subject of recent news coverage.
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
Galveston
Grid Region
ERCOT (Texas)
Market
ISO/RTO Member
Developer
SOUTHERN SELECT ENERGY STORAGE LLC
Utility
—
Entity
ERCOT
Service Type
—
Point of Interconnection
Bus Name: TNHEIGHTS_1 Bus Number: 38740
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_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.
Forward forecasts, scenario decomposition, and risk-decision tooling for this queue project.
