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304 MW BESS operating in Brazoria, TX — Electric Reliability Council of Texas, Inc.
304 MW
Nameplate Capacity
1
Generators
unit
Batteries
Technology
2025
Operating Since
Coordinates
29.4559, -95.3113
County
Brazoria, TX
Nearby Plants
| Field | EIA | GEM | Wikidata |
|---|---|---|---|
| Operator | SMT Ironman BESS LLC | — | — |
| Owner(s) | SMT Ironman BESS LLC | — | — |
| Status | Operating | — | — |
The SMT Ironman Battery Storage Plant is a 304 MW battery energy storage system (BESS) located in Brazoria County, Texas. The plant, which began operating in 2025, has one generator and is owned and operated by SMT Ironman BESS LLC. The facility utilizes batteries as its primary fuel source, categorized under the code "MWH".
The plant operates within the Electric Reliability Council of Texas (ERCOT) balancing authority, and the NERC region TRE. With a capacity of 304 MW, the SMT Ironman Battery Storage Plant is ranked as the 49th largest power plant in Texas out of 224, and 137th nationally out of 514. The battery system has a duration of 1.45 hours.
Generated from EIA, GEM, and public data sources
ISO/RTO
ERCOT
Market
ISO/RTO Member
NERC Region
TRE — Texas Reliability Entity
Balancing Authority
−1.9K MWh
Net Charging
-13.3K MWh
Annual Net Energy
-0.9%
Capacity Factor
Positive values indicate net discharge (generation exceeds station load). Negative values indicate net charging. Pure battery storage plants are typically net negative due to round-trip efficiency losses.
2023
$1,361/kW
Est. Construction Cost
Total estimated cost: $413.7M
Market Position
ISO/RTO Market
ERCOT
LMP Node
COSTAL
Pricing Hub
HB_HOUSTON
Node Source
EIA-860 direct report
Last updated 2026-03-26
View all articlesElectric Reliability Council of Texas, Inc. (ERCO)
Grid Voltage
345.0 kV
Regulatory Status
NR — Non-Regulated
Entity Type
Independent Power Producer
Sector
IPP Non-CHP