Seven Flags BESS LLC — Plant Summary
- EIA Plant ID
- 66689
- Capacity
- 100 MW
- Primary Fuel
- Battery Storage
- Technology
- Batteries
- Status
- Under construction
- Location
- Webb, TX
- Operating Since
- —
- Generators
- 1
- Operator
- Seven Flags BESS LLC
- Parent Company
- —
- Balancing Authority
- Electric Reliability Council of Texas, Inc.
- ISO/RTO
- ERCOT
- NERC Region
- TRE
Seven Flags BESS LLC
Under constructionBESS
Ranked #147 of 256 BESS plants in TX#328 of 837 nationally
100 MW BESS under construction in Webb, TX — Electric Reliability Council of Texas, Inc.
EIA
100 MW
Nameplate Capacity
1
Generators
unit
Batteries
Technology
—
Operating Since
Location
Coordinates
27.4561, -99.4173
County
Webb, TX
Nearby Plants
- LaredoNatural Gas263.6 MW · 15.3 km
- Quarter Ranch SolarSolar154.1 MW · 17.3 km
- HEB00095Natural Gas1.6 MW · 17.7 km
Ownership & Operator
| Field | EIA | GEM | Wikidata |
|---|---|---|---|
| Operator | Seven Flags BESS LLC | — | — |
| Owner(s) | Seven Flags BESS LLC | — | — |
| Status | Under construction | — | — |
Ownership Chain
No GEM tracker match for this plant — ownership chain unavailable.
About
Seven Flags BESS LLC, plant ID 66689, is a 100 MW battery energy storage system (BESS) located in Webb County, Texas. The facility is owned and operated by Seven Flags BESS LLC. It consists of a single generator utilizing batteries as its primary fuel source, measured in MWh. The plant operates within the Electric Reliability Council of Texas, Inc. (ERCOT) balancing authority, falling under the TRE NERC region.
Seven Flags BESS LLC is ranked as the 217th largest plant in Texas out of 224, and nationally it is ranked 509th out of 514. Public information indicates that the plant has been the subject of 7 news articles, with 5 focusing on deals and 2 on industry-related topics.
Generated from EIA, GEM, and public data sources
Engineering & Generators
Grid Context
NERC Region
TRE
Balancing Authority
Electric Reliability Council of Texas, Inc.
Grid Voltage
138 kV
Regulatory Status
NR
Entity Type
Independent Power Producer
Sector
IPP Non-CHP
Interconnection Queue1 projectBeta
Seven Flags BESS
ActiveBattery102.7 MWERCOT
Generation
No generation data available for this plant.
Financial Data
No financial data available for this plant.
Pricing & Market Data
HIGH confidencePoint of Interconnection
Nearest Substation
Wormser Road Substation · 138 kV
Substation Distance
< 10 km
Operator
American Electric Power
Coord Source
OSM spatial
Market Position
ISO/RTO Market
ERCOT
LMP Node
—
Pricing Hub
HB_SOUTH
Node Source
OSM spatial match
Substation identified. Node ID not yet resolved against ISO roster.
Sierra Vista SubstationSubstation
News & Articles (10)Beta
Industry·corporate
Texas: SolarMax wins EPC contract for 600 MWh BESS; Spearmint nets investment for 400 MWh of BESS
United States company SolarMax expects the contract for its Texas battery energy storage system (BESS) to generate revenues of $258.1...
SolarMax (other)Spearmint (other)
ESS News·2 months ago
General
ROUNDUP: Texas BESS updates from SolarMax, Energy Vault, Engie, and Spearmint
A roundup of BESS projects from SolarMax, Energy Vault, Engie, and Spearmint in the Electric Reliability Council of Texas (ERCOT) market.
Energy-Storage.News·2 months ago
General
ROUNDUP: Texas BESS updates from SolarMax, Energy Vault, Engie, and Spearmint
A roundup of BESS projects from SolarMax, Energy Vault, Engie, and Spearmint in the Electric Reliability Council of Texas (ERCOT) market.
Energy-Storage.News·2 months ago
General
ROUNDUP: Texas BESS updates from SolarMax, Energy Vault, Engie, and Spearmint
A roundup of BESS projects from SolarMax, Energy Vault, Engie, and Spearmint in the Electric Reliability Council of Texas (ERCOT) market.
Energy-Storage.News·2 months ago
Last updated 2026-03-26
View all 10 articles