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150 MW BESS operating in Webb, TX — Electric Reliability Council of Texas, Inc.
150 MW
Nameplate Capacity
1
Generators
unit
Batteries
Technology
2023
Operating Since
Coordinates
27.5771, -99.2764
County
Webb, TX
Nearby Plants
| Field | EIA | GEM | Wikidata |
|---|---|---|---|
| Operator | Wolf Tank Storage LLC | — | — |
| Owner(s) | Wolf Tank Storage LLC | — | — |
| Status | Operating | — | — |
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
ISO/RTO
ERCOT
Market
ISO/RTO Member
NERC Region
TRE — Texas Reliability Entity
Balancing Authority
−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.
2023
$1,361/kW
Est. Construction Cost
Total estimated cost: $204.2M
Market Position
ISO/RTO Market
ERCOT
LMP Node
WFTANK_ESS1
Pricing Hub
HB_SOUTH
Alt. Hub / Zone
LZ_SOUTH
Location Type
Resource Node
Node Source
Curated node match
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ask pi about Wolf Tank StorageElectric Reliability Council of Texas, Inc. (ERCO)
Grid Voltage
138.0 kV
Regulatory Status
NR — Non-Regulated
Entity Type
Independent Power Producer
Sector
IPP Non-CHP