Bat Cave
Battery storage project in Mason County, Texas. 100 MW of nameplate capacity across 1 generator, operated by Engie North America.
Also known as Bat Cave BESS · EIA plant 64312
Analyst: free account, 1 question a day.
Key facts
- Capacity
- 100 MWNameplate
- Generators
- 1 operatingEIA-860M, August 2026
- Operating since
- October 2021First generator online
- Operator
- Engie North AmericaEIA operator ID 56201
- Grid
- ERCOTBalancing authority ERCO
- Price nodes
- 1 ERCOT nodeResource nodes with prices
- Location
- Mason County, TX30.7377, −99.2318
- EIA plant ID
- 64312EIA plant page
Data as of EIA-860M August 2026 (published 2026-09-24). Capacity is nameplate, not live output.
How much power Bat Cave produces
Free · EIA-923Net generation, 2025
−13.1 GWh
−13,140 MWh, final
Battery discharge, 2025
34.3 GWh
Charge 47.5 GWh
January to July 2026
−7.14 GWh
Provisional
Range, 2022 to 2025
−15.4–−13.1
GWh a year. Low 2023, high 2025
| 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 | −127 | Not reported | 3 of 12 |
| 2022 | −13,305 | Not reported | 12 of 12 |
| 2023 | −15,429 | Not reported | 12 of 12 |
| 2024 | −14,870 | Not reported | 12 of 12 |
| 2025 | −13,140 | Not reported | 12 of 12 |
| 2026 (provisional, partial year) | −7,142 | 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 |
|---|---|---|---|
| BC | Batteries | 100.0 | October 2021 |
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 Engie North America 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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Power plants near Bat Cave
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Questions about Bat Cave
How much power does Bat Cave produce?
Bat Cave reported −13,140 MWh (−13.1 GWh) of net generation in 2025. From January to July 2026 it reported −7.14 GWh, which is provisional.
Where is Bat Cave?
Bat Cave is in Mason County, Texas, at 30.7377, −99.2318. It is in the Electric Reliability Council of Texas, Inc. balancing area (ERCO).
Who operates Bat Cave?
EIA-860M for August 2026 lists Engie North America as the operator (EIA operator ID 56201). The operator is not always the owner.
When did Bat Cave start operating?
Its first generator began operating in October 2021, according to EIA-860M.
Does InfraMap have power prices for Bat Cave?
Yes. InfraMap has ERCOT day-ahead and real-time prices at 1 price node linked to Bat Cave, 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
- Plant names from OpenStreetMap, © OpenStreetMap contributors (ODbL)
Page updated 2026-10-04 from the InfraMap data build. Methodology · Data sources · EIA plant page