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304 MW BESS operating in Brazoria, TX
304 MW
Nameplate Capacity
1
Generators
unit
Batteries
Technology
2025
Operating Since
Coordinates
29.4559, -95.3113
County
Brazoria, TX
Nearby Plants
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| 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
Electric 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
Monthly net generation as reported to EIA-923 — useful for historical context. Confidence varies sharply by fuel type; the band above and the “About this data” button explain the caveats specific to this plant and how InfraSure’s in-house model handles them.
−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.
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2023
$1,361/kW
Est. Construction Cost
Total estimated cost: $413.7M
Forward revenue, DSCR bands, and refinancing risk projected under price, demand, and policy scenarios. Powered by InfraSure's asset cashflow stack.
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Market Position
ISO/RTO Market
ERCOT
LMP Node
COSTAL
Pricing Hub
HB_HOUSTON
Node Source
EIA-860 direct report
No wholesale contracts disclosed in FERC EQR for this plant.
FERC EQR captures bilateral wholesale energy + capacity contracts ≥$1M/yr filed quarterly by jurisdictional sellers — covers renewable PPAs, thermal energy sales agreements, capacity contracts, and tolling agreements alike. Many plants don't appear: regulated-utility output flows to ratepayers via cost-of-service rather than bilateral contracts; small projects fall below the filing threshold; tax-equity-financed renewables route offtake to investors not utilities; merchant plants sell into ISO clearing markets without bilateral contracts. News-extracted buyer facts (below) may surface contracts disclosed only through announcements.
Last updated 2026-03-26
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