Connolly BESS — Plant Summary
- EIA Plant ID
- 67861
- Capacity
- 125 MW
- Primary Fuel
- Battery Storage
- Technology
- Batteries
- Status
- Operating
- Location
- Wise, TX
- Operating Since
- 2024
- Generators
- 1
- Operator
- BT Connolly Storage, LLC
- Parent Company
- —
- Annual Generation
- -14,730 MWh
- Capacity Factor
- -1.3%
- Balancing Authority
- Electric Reliability Council of Texas, Inc.
- ISO/RTO
- ERCOT
- NERC Region
- TRE
Connolly BESS
OperatingBESS
Ranked #128 of 256 BESS plants in TX#274 of 837 nationally
125 MW BESS operating in Wise, TX — Electric Reliability Council of Texas, Inc.
EIA
125 MW
Nameplate Capacity
1
Generators
unit
Batteries
Technology
2024
Operating Since
Location
Coordinates
33.2113, -97.4197
County
Wise, TX
Nearby Plants
- Porter Solar, LLC (TX)Solar245 MW · 12.0 km
- Sandford Solar and StorageBESS227.1 MW · 14.7 km
- TX10 Hummingbird StorageBESS100 MW · 15.8 km
Ownership & Operator
| Field | EIA | GEM | Wikidata |
|---|---|---|---|
| Operator | BT Connolly Storage, LLC | — | — |
| Owner(s) | BT Connolly Storage, LLC | — | — |
| Status | Operating | — | — |
Ownership Chain
No GEM tracker match for this plant — ownership chain unavailable.
About
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
Engineering & Generators
Grid Context
NERC Region
TRE
Balancing Authority
Electric Reliability Council of Texas, Inc.
Grid Voltage
138 kV
Regulatory Status
NR
Entity Type
Independent Power Producer
Sector
IPP Non-CHP
Generation
−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.
Financial Data
No financial data available for this plant.
Pricing & Market Data
HIGH confidenceMarket Position
ISO/RTO Market
ERCOT
LMP Node
CNLY_ESS_RN
Pricing Hub
HB_NORTH
Secondary Zone
LZ_NORTH
Location Type
Resource Node
Node Source
EIA-860 direct report
News & Articles (1)Beta
Industry·technology
Why Oklahoma farmers are leery of the energy storage facility next door
Oklahoma leaders have embraced large-scale battery storage as part of the state's growing wind and solar industry. But farmers fear fire risks, land...
Investigate Midwest·1 years ago
Last updated 2026-03-14
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