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9.9 MW BESS operating in Williamson, TX
9.9 MW
Nameplate Capacity
1
Generators
unit
Batteries
Technology
2020
Operating Since
Coordinates
30.5882, -97.6846
County
Williamson, TX
Nearby Plants
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| Field | EIA | GEM | Wikidata |
|---|---|---|---|
| Operator | Rabbit Hill Energy Storage Project | — | — |
| Owner(s) | Rabbit Hill Energy Storage Project | — | — |
| Status | Operating | — | — |
The Rabbit Hill Energy Storage Project is a 9.9 MW battery energy storage system located in Williamson County, Texas. The plant began operating in 2020 and is owned and operated by Rabbit Hill Energy Storage Project. It consists of a single generator utilizing battery storage technology with lithium-ion battery chemistry (LIB). The plant's total storage capacity is 9.9 MWh, providing a duration of approximately 1 hour at full output.
The facility's primary fuel source is electricity (MWH), which it stores and discharges as needed. Rabbit Hill operates within the Electric Reliability Council of Texas (ERCOT) balancing authority, and the TRE NERC region. In terms of size, the plant is ranked 287th out of 313 power plants in Texas, and 836th out of 1205 plants nationally.
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
24.9 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.
−74 MWh
Net Charging
-872 MWh
Annual Net Energy
-1.0%
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.
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2020
$758/kW
Est. Construction Cost
Total estimated cost: $7.5M
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Point of Interconnection
Nearest Substation
Georgetown South Substation · 138 kV
Substation Distance
0 km
Operator
Lower Colorado River Authority
Coord Source
OSM spatial
Market Position
ISO/RTO Market
ERCOT
LMP Node
RHESS2_ESS1
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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