Wolf Tank Storage
Battery storage project in Webb County, Texas. 150 MW of nameplate capacity across 1 generator, operated by Wolf Tank Storage LLC.
Also known as EIA plant 66616
Analyst: free account, 1 question a day.
Key facts
- Capacity
- 150 MWNameplate
- Generators
- 1 operatingEIA-860M, August 2026
- Operating since
- July 2023First generator online
- Operator
- Wolf Tank Storage LLCEIA operator ID 65642
- Grid
- ERCOTBalancing authority ERCO
- Price nodes
- 1 ERCOT nodeResource nodes with prices
- Location
- Webb County, TX27.5772, −99.2760
- EIA plant ID
- 66616EIA plant page
Data as of EIA-860M August 2026 (published 2026-09-24). Capacity is nameplate, not live output.
How much power Wolf Tank Storage produces
Free · EIA-923Net generation, 2025
−17.2 GWh
−17,247 MWh, final
Battery discharge, 2025
57.4 GWh
Charge 74.7 GWh
January to July 2026
−9.55 GWh
Provisional
Range, 2024 to 2025
−17.2–−15.6
GWh a year. Low 2025, high 2024
| 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 | −7,014 | Not reported | 6 of 12 |
| 2024 | −15,598 | Not reported | 12 of 12 |
| 2025 | −17,247 | Not reported | 12 of 12 |
| 2026 (provisional, partial year) | −9,554 | Not reported | 7 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 |
|---|---|---|---|
| 1 | Batteries | 150.0 | July 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 Wolf Tank Storage 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 Wolf Tank Storage
How much power does Wolf Tank Storage produce?
Wolf Tank Storage reported −17,247 MWh (−17.2 GWh) of net generation in 2025. From January to July 2026 it reported −9.55 GWh, which is provisional.
Where is Wolf Tank Storage?
Wolf Tank Storage is in Webb County, Texas, at 27.5772, −99.2760. It is in the Electric Reliability Council of Texas, Inc. balancing area (ERCO).
Who operates Wolf Tank Storage?
EIA-860M for August 2026 lists Wolf Tank Storage LLC as the operator (EIA operator ID 65642). The operator is not always the owner.
When did Wolf Tank Storage start operating?
Its first generator began operating in July 2023, according to EIA-860M.
Does InfraMap have power prices for Wolf Tank Storage?
Yes. InfraMap has ERCOT day-ahead and real-time prices at 1 price node linked to Wolf Tank Storage, 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