SMT Rio Grande II LLC
Battery storage project in Starr County, Texas. 10 MW of nameplate capacity across 1 generator, operated by SMT Rio Grande II LLC.
Also known as EIA plant 66935
Analyst: free account, 1 question a day.
Key facts
- Capacity
- 10 MWNameplate
- Generators
- 1 operatingEIA-860M, August 2026
- Operating since
- December 2023First generator online
- Operator
- SMT Rio Grande II LLCEIA operator ID 65846
- Grid
- ERCOTBalancing authority ERCO
- Price nodes
- None linkedNo verified ISO node
- Location
- Starr County, TX26.3910, −98.8204
- EIA plant ID
- 66935EIA plant page
Data as of EIA-860M August 2026 (published 2026-09-24). Capacity is nameplate, not live output.
How much power SMT Rio Grande II produces
Free · EIA-923Net generation, 2025
−307 MWh
−307 MWh, final
Battery discharge, 2025
1.24 GWh
Charge 1.55 GWh
January to July 2026
Not reported
Provisional. 0 of 7 months reported
Range, 2024 to 2025
−357.0–−307.0
MWh a year. Low 2024, high 2025
| Year | Net generation, MWh | Capacity factor | Months reported |
|---|---|---|---|
| 2000 | Not reported | Not reported | 0 of 12 |
| 2001 | Not reported | Not reported | 0 of 12 |
| 2002 | Not reported | Not reported | 0 of 12 |
| 2003 | Not reported | Not reported | 0 of 12 |
| 2004 | Not reported | Not reported | 0 of 12 |
| 2005 | Not reported | Not reported | 0 of 12 |
| 2006 | Not reported | Not reported | 0 of 12 |
| 2007 | Not reported | Not reported | 0 of 12 |
| 2008 | Not reported | Not reported | 0 of 12 |
| 2009 | Not reported | Not reported | 0 of 12 |
| 2010 | Not reported | Not reported | 0 of 12 |
| 2011 | Not reported | Not reported | 0 of 12 |
| 2012 | Not reported | Not reported | 0 of 12 |
| 2013 | Not reported | Not reported | 0 of 12 |
| 2014 | Not reported | Not reported | 0 of 12 |
| 2015 | Not reported | Not reported | 0 of 12 |
| 2016 | Not reported | Not reported | 0 of 12 |
| 2017 | Not reported | Not reported | 0 of 12 |
| 2018 | Not reported | Not reported | 0 of 12 |
| 2019 | Not reported | Not reported | 0 of 12 |
| 2020 | Not reported | Not reported | 0 of 12 |
| 2021 | Not reported | Not reported | 0 of 12 |
| 2022 | Not reported | Not reported | 0 of 12 |
| 2023 | Not reported | Not reported | 0 of 12 |
| 2024 | −357 | Not reported | 12 of 12 |
| 2025 | −307 | Not reported | 12 of 12 |
| 2026 (provisional, partial year) | Not reported | Not reported | 0 of 7 |
* 2026 covers January to July and is provisional. Battery plants can report negative net generation, when charging uses more energy than they discharge.
Power prices and basis
Free accountNo verified ISO price node is linked to this plant, or its price history could not load.
Emissions
Free · EPA CAMPDNo EPA emissions units are linked to this plant.
Water use
Free · EIA-923 cooling, USGSNo EIA cooling-water record for this plant in 2024. Plants without steam cooling, such as wind, solar and batteries, do not report cooling water.
Generators
Free · EIA-860M| Generator | Technology | Nameplate MW | Online since |
|---|---|---|---|
| SMTR2 | Batteries | 10.0 | December 2023 |
Ownership and offtake
ProOwnership and offtake are part of Pro
Owners and their shares, parent companies, and power purchase agreements with their buyers. EIA-860M lists SMT Rio Grande II LLC as the operator, which is not always the owner.
Modeled data
ProPro adds modeled values for this plant. Everything above stays free.
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Questions about SMT Rio Grande II
How much power does SMT Rio Grande II LLC produce?
SMT Rio Grande II LLC reported −307 MWh (−307 MWh) of net generation in 2025.
Where is SMT Rio Grande II LLC?
SMT Rio Grande II LLC is in Starr County, Texas, at 26.3910, −98.8204. It is in the Electric Reliability Council of Texas, Inc. balancing area (ERCO).
Who operates SMT Rio Grande II LLC?
EIA-860M for August 2026 lists SMT Rio Grande II LLC as the operator (EIA operator ID 65846). The operator is not always the owner.
When did SMT Rio Grande II LLC start operating?
Its first generator began operating in December 2023, according to EIA-860M.
Sources
- EIA-860 2025 (final) and EIA-860M August 2026: plant, generators, capacity, operator and location
- EIA-923 monthly net generation, 2000 to July 2026 (2026 provisional)
Page updated 2026-10-04 from the InfraMap data build. Methodology · Data sources · EIA plant page