Castle Gap Solar Hybrid
Vistra Corp · Upton County · ERCOT
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.
Overview
Key fields
- Reported capacity
- 189.9 MW
EIA-reported operating capacity; nameplate, seasonal, AC/DC, and unit ratings may differ.
- Technology
- Solar + battery storage
Primary generation technology.
- Registry anchor
- Plant 60123
Upton County Solar 2 LLC · Upton County · ERCOT
- Operating status
- Operating
Castle Gap Solar Hybrid is operating.
- Equipment
- 485,000 panels / 90 inverters
Installed equipment documented in public project records.
- Resource stack
- 2 resources
CASL_GAP_ESR1 · CASL_GAP_UNIT1
Profile
- Grid role
- Utility-scale solar generation in ERCOT's energy-only market.
- Physical build
- Castle Gap Solar Hybrid (EIA 60123) — a two-unit solar + battery hybrid: solar generation ~189.9 MW AC (EIA record), DC net capacity reported 234 MW, single-axis tracking, crystalline silicon PV; approximately 485,000 PV modules reported in project summaries; 90 KACO BP 2200 TL3 solar inverters (2.0 MW each) specified in the interconnection agreement; on-site battery energy storage: 9.9 MW / 42 MWh (LIB) storage, enclosure type reported as 'CS' in storage details. Sources below provide the cited counts and electrical ratings; OEM module supplier is not identified in the available corpus, and no OEM product pages for installed equipment were found there.
Structured profile
- Reported capacity
- 189.9 MW
Batteries; Solar Photovoltaic.
- Operating status
- operating
Castle Gap Solar Hybrid is operating.
- Location
- Upton County
ERCOT
- Operator
- Upton County Solar 2 LLC
- Asset role
- solar
ERCOT · Upton County
Units and generators
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 |
Performance
Monthly EIA generation history and recent market-resource behavior where linked telemetry is available.
Peer context
- Technology capacity
- 180 MW
- National rank
- #216
- TX rank
- #85
Monthly generation
Download CSVMonthly generation is reported through EIA-923. Capacity factor uses the current EIA nameplate capacity and is shown only for complete calendar years.
ERCOT disclosed dispatch
2 ERCOT market resources · Battery / storage, Solar
Dispatch
3 mo through May 22, 2026Cycles/day is discharged energy vs. usable capacity (~9 MWh). Capacity factor is avg discharge vs. peak.
Output by hourlocal time · 90 days through May 22, 2026
Latest disclosed outputhourly · 2 weeks ending May 22, 2026
Generation from ERCOT's 60-Day SCED Disclosure (≈60-day lag), summed over this site's market resources.
Grid and market context
Deterministic links to ERCOT market resources, price records, outage disclosures, queue records, and nearby infrastructure. Candidate joins remain labeled until corroborated.
Market registration
ERCOT public disclosuresOperating context
ERCOT market recordsNearby substations
HIFLD infrastructure inventoryCommercial, land, and environmental record
Source-backed project transactions, agreements, land records, permits, and environmental disclosures. Portfolio and adjacent-project facts remain explicitly scoped.
Land and environmental record
Related parties and identifiers
Parties, market resources, and identifiers tied to this asset, with owner, operator, developer, EPC, compliance provider, and interconnecting entity roles kept separate.
Relationship graph
Drag organizations to explore the network. Select a node to pin its details and available page link.
Parties and identifiers
| Relationship | Entity | Basis |
|---|---|---|
| Operator | Owner / developer associated with Castle Gap Solar Hybrid. | |
| Market resources | CASL_GAP_ESR1, CASL_GAP_UNIT1 | Linked ERCOT resources. |
| Grid selection | plant:plant-60123 | Canonical asset page /ercot/assets/plant/castle-gap-solar-hybrid. |
Reporting portfolio
Portfolio membership follows the latest EIA-860 reporting entity. It does not imply ultimate ownership.
Timeline and sources
Project milestones and public references behind the asset profile.
Project timeline
- Generator enters operationEIA-860
EIA-860 lists generator CGAP with this operating date.
- Generator enters operationEIA-860
EIA-860 lists generator BAT1 with this operating date.
- Latest disclosed generation interval
ERCOT SCED disclosure is delayed, so plant performance windows end at the latest disclosed interval.
Sources
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