Wolf Tank Storage — Plant Summary
- EIA Plant ID
- 66616
- Capacity
- 150 MW
- Primary Fuel
- Battery Storage
- Technology
- Batteries
- Status
- Operating
- Location
- Webb, TX
- Operating Since
- 2023
- Generators
- 1
- Operator
- Wolf Tank Storage LLC
- Parent Company
- —
- Annual Generation
- -17,247 MWh
- Capacity Factor
- -1.3%
- Balancing Authority
- Electric Reliability Council of Texas, Inc.
- ISO/RTO
- ERCOT
- NERC Region
- TRE
Wolf Tank Storage
OperatingBESS
Ranked #122 of 256 BESS plants in TX#240 of 837 nationally
150 MW BESS operating in Webb, TX — Electric Reliability Council of Texas, Inc.
EIA
150 MW
Nameplate Capacity
1
Generators
unit
Batteries
Technology
2023
Operating Since
Location
Coordinates
27.5771, -99.2764
County
Webb, TX
Nearby Plants
- Guajillo Energy StorageBESS228.7 MW · 5.8 km
- Corazon Energy LLCSolar200 MW · 8.8 km
- Cuchillas PV and BESSBESS612.5 MW · 11.7 km
Ownership & Operator
| Field | EIA | GEM | Wikidata |
|---|---|---|---|
| Operator | Wolf Tank Storage LLC | — | — |
| Owner(s) | Wolf Tank Storage LLC | — | — |
| Status | Operating | — | — |
Ownership Chain
No GEM tracker match for this plant — ownership chain unavailable.
About
Wolf Tank Storage is a 150 MW battery energy storage system (BESS) located in Webb County, Texas. The plant, which began operating in 2023, is owned and operated by Wolf Tank Storage LLC. It utilizes lithium-ion batteries (LIB) and has a total storage capacity of 150 MWh, providing a duration of 1 hour at full output. The facility consists of a single generator and ranks as the 165th largest power plant in Texas out of 224, and 386th nationally out of 514. Its primary fuel is electricity (MWH) used to charge the batteries.
The plant operates within the Electric Reliability Council of Texas (ERCOT) balancing authority, which falls under the Texas Reliability Entity (TRE) NERC region. As a grid-connected storage asset, Wolf Tank Storage plays a role in supporting grid stability and reliability within the ERCOT market.
Generated from EIA, GEM, and public data sources
Engineering & Generators
Grid Context
NERC Region
TRE
Balancing Authority
Electric Reliability Council of Texas, Inc.
Grid Voltage
138 kV
Regulatory Status
NR
Entity Type
Independent Power Producer
Sector
IPP Non-CHP
Generation
−1.8K MWh
Net Charging
-17.2K MWh
Annual Net Energy
-1.3%
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.
Financial Data
No financial data available for this plant.
Pricing & Market Data
HIGH confidenceMarket Position
ISO/RTO Market
ERCOT
LMP Node
WFTANK_ESS1
Pricing Hub
HB_SOUTH
Secondary Zone
LZ_SOUTH
Location Type
Resource Node
Node Source
Curated node match
News & Articles (1)Beta
Grid·capacity addition
US battery storage capacity increased by 52% year over year, to 10.8 GW by the end of Q1
The 190MW/380MWh Cunningham facility being commissioned next year will be the largest operating battery energy storage project on the Texas grid.
Cunningham (operator)Texas (other)
Utility Dive·2 years ago
Last updated 2026-03-14
View all articles