Sweeny
Battery storage project in Brazoria County, Texas. 9.9 MW of nameplate capacity across 1 generator, operated by Engie North America.
Also known as EIA plant 64321
Analyst: free account, 1 question a day.
Key facts
- Capacity
- 9.9 MWNameplate
- Generators
- 1 operatingEIA-860M, August 2026
- Operating since
- April 2021First generator online
- Operator
- Engie North AmericaEIA operator ID 56201
- Grid
- ERCOTBalancing authority ERCO
- Price nodes
- 1 ERCOT nodeResource nodes with prices
- Location
- Brazoria County, TX29.0556, −95.6872
- EIA plant ID
- 64321EIA plant page
Data as of EIA-860M August 2026 (published 2026-09-24). Capacity is nameplate, not live output.
How much power Sweeny produces
Free · EIA-923Net generation, 2025
−394 MWh
−394 MWh, final
Battery discharge, 2025
4.58 GWh
Charge 4.97 GWh
January to July 2026
Not reported
Provisional. 0 of 7 months reported
Range, 2024 to 2025
−414.0–−394.0
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 | −414 | Not reported | 12 of 12 |
| 2025 | −394 | 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 account · ERCOTEmissions
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 |
|---|---|---|---|
| SWNY | Batteries | 9.9 | April 2021 |
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 Engie North America as the operator, which is not always the owner.
Modeled data
ProPro adds modeled values for this plant. Everything above stays free.
300 analyst questions a month, plus MCP
Query Sweeny and 14,224 other projects from Claude or your own tools. Free accounts get 1 question a day.
Power plants near Sweeny
More plants operated by Engie North America
Questions about Sweeny
How much power does Sweeny produce?
Sweeny reported −394 MWh (−394 MWh) of net generation in 2025.
Where is Sweeny?
Sweeny is in Brazoria County, Texas, at 29.0556, −95.6872. It is in the Electric Reliability Council of Texas, Inc. balancing area (ERCO).
Who operates Sweeny?
EIA-860M for August 2026 lists Engie North America as the operator (EIA operator ID 56201). The operator is not always the owner.
When did Sweeny start operating?
Its first generator began operating in April 2021, according to EIA-860M.
Does InfraMap have power prices for Sweeny?
Yes. InfraMap has ERCOT day-ahead and real-time prices at 1 price node linked to Sweeny, with the hub price and node-to-hub basis. Prices are free with an InfraMap account; pricing node names are part of InfraMap Pro.
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)
- ERCOT day-ahead and real-time prices; node and hub assignments as of 2026-10-05
Page updated 2026-10-04 from the InfraMap data build. Methodology · Data sources · EIA plant page