Castle Gap Solar Hybrid is a hybrid solar and battery storage facility with 189.9 MW of EIA-reported operating capacity in Upton County, Texas, registered as EIA Plant ID 60123. Upton County Solar 2 LLC is the registered plant entity or operator. Project filings list 485,000 solar panels and 90 inverters for the facility.
EIA-reported operating capacity; nameplate, seasonal, AC/DC, and unit ratings may differ.
Primary generation technology.
Upton County Solar 2 LLC · Upton County · ERCOT
Castle Gap Solar Hybrid is operating.
Installed equipment documented in public project records.
CASL_GAP_ESR1 · CASL_GAP_UNIT1
Batteries; Solar Photovoltaic.
Castle Gap Solar Hybrid is operating.
ERCOT
Similar plants ranked by technology, capacity, and distance.
Operating generator records and technology attributes reported through EIA-860.
| Generator | Capacity | Technology | Operation | Status |
|---|---|---|---|---|
| BAT1 | 9.9 MW 9.9 MW summer | Batteries Electricity used for energy storage · BA | Jun 2019 | Operating |
| CGAP | 180 MW 180 MW summer | Solar Photovoltaic Solar · PV | May 2018 | Operating |
Monthly EIA generation history and recent market-resource behavior where linked telemetry is available.
Deterministic links to ERCOT market resources, price records, outage disclosures, queue records, and nearby infrastructure. Candidate joins remain labeled until corroborated.
Source-backed project transactions, agreements, land records, permits, and environmental disclosures. Portfolio and adjacent-project facts remain explicitly scoped.
Parties, market resources, and identifiers tied to this asset, with owner, operator, developer, EPC, compliance provider, and interconnecting entity roles kept separate.
Project milestones and public references behind the asset profile.
EIA-860 lists generator CGAP with this operating date.
ERCOT · Upton County
Monthly generation is reported through EIA-923. Capacity factor uses the current EIA nameplate capacity and is shown only for complete calendar years.
2 ERCOT market resources · Battery / storage, Solar
Cycles/day is discharged energy vs. usable capacity (~13 MWh). Capacity factor is avg discharge vs. peak.
Observed ERCOT settlement prices at CASL_GAP_UN1 over 363 days (2025-09-11 to 2026-09-10).
The TB2 figure is a price benchmark, not revenue: it values one perfect-foresight cycle per day between the 2 cheapest and 2 dearest hours of each day, gross of round-trip losses, and excludes ancillary services and any physical dispatch constraint. It describes what this node’s price shape was worth over the window — it is not this asset’s realized capture, and no dispatch is assumed or modelled.
Portfolio membership follows the latest EIA-860 reporting entity. It does not imply ultimate ownership.
EIA-860 lists generator BAT1 with this operating date.
ERCOT SCED disclosure is delayed, so plant performance windows end at the latest disclosed interval.
Answered from the published record above. Questions whose inputs this profile does not carry are omitted rather than estimated.
Castle Gap Solar Hybrid has a reported capacity of 189.9 MW. Source: EIA Form 860.
Castle Gap Solar Hybrid is a Batteries; Solar Photovoltaic; facility in Upton County, TX, participating in the ERCOT market.
Castle Gap Solar Hybrid is in Upton County, TX, inside the ERCOT balancing area.
Castle Gap Solar Hybrid is operated by Upton County Solar 2 LLC according to the EIA generator inventory. Reporting membership does not by itself establish ultimate ownership.
Castle Gap Solar Hybrid reported 350 GWh over the twelve months to 2026-06. Figures are net generation as filed to EIA-923.
By capacity, Castle Gap Solar Hybrid ranks #216 of 7,234 operating plants of the same technology nationally. It ranks #85 of 231 in TX.
Plants within 25 km, nearest first, regardless of technology. Proximity is straight-line distance between mapped plant coordinates; it does not by itself establish a shared point of interconnection.
