Connolly BESS
Battery storage project in Wise County, Texas. 125 MW of nameplate capacity across 1 generator, operated by BT Connolly Storage, LLC.
Also known as EIA plant 67861
Analyst: free account, 1 question a day.
Key facts
- Capacity
- 125 MWNameplate
- Generators
- 1 operatingEIA-860M, August 2026
- Operating since
- November 2024First generator online
- Operator
- BT Connolly Storage, LLCEIA operator ID 66432
- Grid
- ERCOTBalancing authority ERCO
- Price nodes
- 1 ERCOT nodeResource nodes with prices
- Location
- Wise County, TX33.2107, −97.4190
- EIA plant ID
- 67861EIA plant page
Data as of EIA-860M August 2026 (published 2026-09-24). Capacity is nameplate, not live output.
How much power Connolly BESS produces
Free · EIA-923Net generation, 2025
−14.7 GWh
−14,730 MWh, final
Battery discharge, 2025
79.3 GWh
Charge 94.1 GWh
January to July 2026
−9.60 GWh
Provisional
| Year | Net generation, MWh | Capacity factor | Months reported |
|---|---|---|---|
| 2000 | Not reported | Not reported | 0 of 12 |
| 2001 | Not reported | Not reported | 0 of 12 |
| 2002 | Not reported | Not reported | 0 of 12 |
| 2003 | Not reported | Not reported | 0 of 12 |
| 2004 | Not reported | Not reported | 0 of 12 |
| 2005 | Not reported | Not reported | 0 of 12 |
| 2006 | Not reported | Not reported | 0 of 12 |
| 2007 | Not reported | Not reported | 0 of 12 |
| 2008 | Not reported | Not reported | 0 of 12 |
| 2009 | Not reported | Not reported | 0 of 12 |
| 2010 | Not reported | Not reported | 0 of 12 |
| 2011 | Not reported | Not reported | 0 of 12 |
| 2012 | Not reported | Not reported | 0 of 12 |
| 2013 | Not reported | Not reported | 0 of 12 |
| 2014 | Not reported | Not reported | 0 of 12 |
| 2015 | Not reported | Not reported | 0 of 12 |
| 2016 | Not reported | Not reported | 0 of 12 |
| 2017 | Not reported | Not reported | 0 of 12 |
| 2018 | Not reported | Not reported | 0 of 12 |
| 2019 | Not reported | Not reported | 0 of 12 |
| 2020 | Not reported | Not reported | 0 of 12 |
| 2021 | Not reported | Not reported | 0 of 12 |
| 2022 | Not reported | Not reported | 0 of 12 |
| 2023 | Not reported | Not reported | 0 of 12 |
| 2024 | −4,766 | Not reported | 5 of 12 |
| 2025 | −14,730 | Not reported | 12 of 12 |
| 2026 (provisional, partial year) | −9,604 | Not reported | 7 of 7 |
* 2026 covers January to July and is provisional. Battery plants can report negative net generation, when charging uses more energy than they discharge.
Power prices and basis
Free account · ERCOTEmissions
Free · EPA CAMPDNo EPA emissions units are linked to this plant.
Water use
Free · EIA-923 cooling, USGSNo EIA cooling-water record for this plant in 2024. Plants without steam cooling, such as wind, solar and batteries, do not report cooling water.
Generators
Free · EIA-860M| Generator | Technology | Nameplate MW | Online since |
|---|---|---|---|
| CNLY | Batteries | 125.0 | November 2024 |
Ownership and offtake
ProOwnership and offtake are part of Pro
Owners and their shares, parent companies, and power purchase agreements with their buyers. EIA-860M lists BT Connolly Storage, LLC as the operator, which is not always the owner.
Modeled data
ProPro adds modeled values for this plant. Everything above stays free.
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Questions about Connolly BESS
How much power does Connolly BESS produce?
Connolly BESS reported −14,730 MWh (−14.7 GWh) of net generation in 2025. From January to July 2026 it reported −9.60 GWh, which is provisional.
Where is Connolly BESS?
Connolly BESS is in Wise County, Texas, at 33.2107, −97.4190. It is in the Electric Reliability Council of Texas, Inc. balancing area (ERCO).
Who operates Connolly BESS?
EIA-860M for August 2026 lists BT Connolly Storage, LLC as the operator (EIA operator ID 66432). The operator is not always the owner.
When did Connolly BESS start operating?
Its first generator began operating in November 2024, according to EIA-860M.
Does InfraMap have power prices for Connolly BESS?
Yes. InfraMap has ERCOT day-ahead and real-time prices at 1 price node linked to Connolly BESS, with the hub price and node-to-hub basis. Prices are free with an InfraMap account; pricing node names are part of InfraMap Pro.
Sources
- EIA-860 2025 (final) and EIA-860M August 2026: plant, generators, capacity, operator and location
- EIA-923 monthly net generation, 2000 to July 2026 (2026 provisional)
- ERCOT day-ahead and real-time prices; node and hub assignments as of 2026-10-05
Page updated 2026-10-04 from the InfraMap data build. Methodology · Data sources · EIA plant page