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50 MW BESS operating in Williamson, TX
50 MW
Nameplate Capacity
1
Generators
unit
Batteries
Technology
2023
Operating Since
Coordinates
30.4143, -97.3552
County
Williamson, TX
Nearby Plants
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| 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
Electric 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
Monthly net generation as reported to EIA-923 — useful for historical context. Confidence varies sharply by fuel type; the band above and the “About this data” button explain the caveats specific to this plant and how InfraSure’s in-house model handles them.
−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.
Forward-looking generation outlook with probabilistic ranges across weather, demand, and policy scenarios. Powered by InfraSure's generation modeling stack.
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2023
$1,361/kW
Est. Construction Cost
Total estimated cost: $68.0M
Forward revenue, DSCR bands, and refinancing risk projected under price, demand, and policy scenarios. Powered by InfraSure's asset cashflow stack.
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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
No wholesale contracts disclosed in FERC EQR for this plant.
FERC EQR captures bilateral wholesale energy + capacity contracts ≥$1M/yr filed quarterly by jurisdictional sellers — covers renewable PPAs, thermal energy sales agreements, capacity contracts, and tolling agreements alike. Many plants don't appear: regulated-utility output flows to ratepayers via cost-of-service rather than bilateral contracts; small projects fall below the filing threshold; tax-equity-financed renewables route offtake to investors not utilities; merchant plants sell into ISO clearing markets without bilateral contracts. News-extracted buyer facts (below) may surface contracts disclosed only through announcements.
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