Castle Gap Solar Hybrid
Solar project in Upton County, Texas. 189.9 MW of nameplate capacity across 2 generators, operated by Upton County Solar 2 LLC.
Also known as Upton County Solar 2 · EIA plant 60123
This project groups Castle Gap Solar Hybrid (EIA 60123). EIA reports them as separate plants.
Analyst: free account, 1 question a day.
Key facts
- Capacity
- 189.9 MWSolar 180.0 · Battery storage 9.9
- Generators
- 2 operatingEIA-860M, August 2026
- Operating since
- May 2018First generator online
- Operator
- Upton County Solar 2 LLCEIA operator ID 61123
- Grid
- ERCOTBalancing authority ERCO
- Price nodes
- 1 ERCOT nodeResource nodes with prices
- Location
- Upton County, TX31.2550, −102.2720
- EIA plant ID
- 60123EIA plant page
Data as of EIA-860M August 2026 (published 2026-09-24). Capacity is nameplate, not live output.
How much power Castle Gap Solar Hybrid produces
Free · EIA-923Net generation, 2025
384 GWh
384,210 MWh, final
Capacity factor, 2025
24.4%
2024: 25.1%
January to July 2026
202 GWh
Provisional
Range, 2020 to 2025
384.2–451.2
GWh a year. Low 2025, high 2022
| 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 | 300,193 | 27.6% | 8 of 12 |
| 2019 | 262,948 | Not reported | 7 of 12 |
| 2020 | 408,144 | 26.7% | 12 of 12 |
| 2021 | 427,588 | 28.0% | 12 of 12 |
| 2022 | 451,168 | 29.1% | 12 of 12 |
| 2023 | 396,246 | 25.2% | 12 of 12 |
| 2024 | 396,135 | 25.1% | 12 of 12 |
| 2025 | 384,210 | 24.4% | 12 of 12 |
| 2026 (provisional, partial year) | 201,985 | 22.1% | 7 of 7 |
* 2026 covers January to July and is provisional. Capacity factor is net generation divided by nameplate capacity times the hours of each reported month.
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 |
|---|---|---|---|
| BAT1 | Batteries | 9.9 | June 2019 |
| CGAP | Solar Photovoltaic | 180.0 | May 2018 |
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 Upton County Solar 2 LLC as the operator, which is not always the owner.
Modeled data
ProPro adds modeled values for this plant. Everything above stays free.
Modeled curtailment
A range, not one number. The lower bound counts hours inside the production tax credit window; the upper bound is the no-credit case.
Expected vs reported generation
Monthly modeled expected output and physical potential next to EIA-923 reported output.
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Power plants near Castle Gap Solar Hybrid
Questions about Castle Gap Solar Hybrid
How much power does Castle Gap Solar Hybrid produce?
Castle Gap Solar Hybrid reported 384,210 MWh (384 GWh) of net generation in 2025, a 24.4% capacity factor on 189.9 MW of nameplate capacity. From January to July 2026 it reported 202 GWh, which is provisional.
Where is Castle Gap Solar Hybrid?
Castle Gap Solar Hybrid is in Upton County, Texas, at 31.2550, −102.2720. It is in the Electric Reliability Council of Texas, Inc. balancing area (ERCO).
Who operates Castle Gap Solar Hybrid?
EIA-860M for August 2026 lists Upton County Solar 2 LLC as the operator (EIA operator ID 61123). The operator is not always the owner.
When did Castle Gap Solar Hybrid start operating?
Its first generator began operating in May 2018, according to EIA-860M.
Does InfraMap have power prices for Castle Gap Solar Hybrid?
Yes. InfraMap has ERCOT day-ahead and real-time prices at 1 price node linked to Castle Gap Solar Hybrid, 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