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125 MW BESS operating in Wise, TX — Electric Reliability Council of Texas, Inc.
125 MW
Nameplate Capacity
1
Generators
unit
Batteries
Technology
2024
Operating Since
Coordinates
33.2113, -97.4197
County
Wise, TX
Nearby Plants
| Field | EIA | GEM | Wikidata |
|---|---|---|---|
| Operator | BT Connolly Storage, LLC | — | — |
| Owner(s) | BT Connolly Storage, LLC | — | — |
| Status | Operating | — | — |
Connolly BESS is a 125 MW battery energy storage system located in Wise County, Texas. The plant began operating in 2024 and is owned and operated by BT Connolly Storage, LLC. It consists of one generator utilizing battery technology with a total storage capacity of 250 MWh, providing a duration of 2 hours. The battery chemistry is classified as "OTH".
The facility operates within the Electric Reliability Council of Texas (ERCOT) balancing authority and the TRE NERC region. Connolly BESS ranks as the 185th largest power plant in Texas out of 224, and 431st nationally out of 514. The plant's primary fuel is electricity, indicated by the fuel code "MWH".
Generated from EIA, GEM, and public data sources
ISO/RTO
ERCOT
Market
ISO/RTO Member
NERC Region
TRE — Texas Reliability Entity
Balancing Authority
−1.6K MWh
Net Charging
-14.7K 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: $170.1M
Market Position
ISO/RTO Market
ERCOT
LMP Node
CNLY_ESS_RN
Pricing Hub
HB_NORTH
Alt. Hub / Zone
LZ_NORTH
Location Type
Resource Node
Node Source
EIA-860 direct report
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ask pi about Connolly BESSElectric 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