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50 MW BESS operating in Williamson, TX — Electric Reliability Council of Texas, Inc.
50 MW
Nameplate Capacity
1
Generators
unit
Batteries
Technology
2023
Operating Since
Coordinates
30.4143, -97.3552
County
Williamson, TX
Nearby Plants
| Field | EIA | GEM | Wikidata |
|---|---|---|---|
| Operator | Key Capture Energy | — | — |
| Owner(s) | Key Capture Energy | — | — |
| Status | Operating | — | — |
TX21 River Valley Storage 2 is a 50 MW battery energy storage system (BESS) located in Williamson County, Texas. The plant began operating in 2023 and is owned and operated by Key Capture Energy. It is interconnected to the Electric Reliability Council of Texas (ERCOT) grid, within the TRE NERC region. The facility ranks 234th in size among power plants in Texas, and 611th nationally.
The plant consists of a single generator utilizing battery storage technology. The battery system has a total storage capacity of 107 MWh, providing a duration of approximately 2.14 hours at its full 50 MW output. The battery chemistry is lithium-ion (LIB). The plant's primary fuel is "MWH", indicating that it charges using electricity from the grid.
Generated from EIA, GEM, and public data sources
ISO/RTO
ERCOT
Market
ISO/RTO Member
NERC Region
TRE — Texas Reliability Entity
Balancing Authority
−833 MWh
Net Charging
-7.1K MWh
Annual Net Energy
-1.6%
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: $68.0M
Market Position
ISO/RTO Market
ERCOT
LMP Node
RVRVLYS_ALL
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 TX21 River Valley Storage 2Electric 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