Hecate Energy Longhorn Solar LLC is a solar power facility with 650 MW of EIA-reported operating capacity in Jack County, Texas, registered as EIA Plant ID 68839. Repsol Renewables NA owns and operates the plant. Project filings list 1,500,000 solar panels and 170 inverters for the facility. Commercial operation began on May 21, 2026. The facility interconnects at Long Hollow Switch at 345 kV.
EIA-reported operating capacity; nameplate, seasonal, AC/DC, and unit ratings may differ.
Primary generation technology.
Repsol Renewables NA · Jack County · ERCOT
Hecate Energy Longhorn Solar LLC is operating.
345 kV · Oncor Electric Delivery Company LLC
Best-supported operating milestone.
Solar Photovoltaic
Hecate Energy Longhorn Solar LLC is operating.
345 kV · Oncor Electric Delivery Company LLC
ERCOT
Similar plants ranked by technology, capacity, and distance.
Operating generator records and technology attributes reported through EIA-860.
| Generator | Capacity | Technology | Operation | Status |
|---|---|---|---|---|
| RRPS | 650 MW 650 MW summer | Solar Photovoltaic Solar · PV | Apr 2026 | 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.
Drag organizations to explore the network. Select a node to pin its details and available page link.
Project milestones and public references behind the asset profile.
Oncor Electric Delivery Company LLC filed the generation interconnection agreement with Hecate Energy Longhorn Solar LLC, identified as Pinnington Solar.
ERCOT · Jack County
Monthly generation is reported through EIA-923. Capacity factor uses the current EIA nameplate capacity and is shown only for complete calendar years.
| Largest reported plants | Capacity | State | |
|---|---|---|---|
| Hecate Energy Outpost Solar LLC | 515 MW | TX | |
| Hecate Energy Frye Solar LLC | 500 MW | TX | |
| Jicarilla Solar 1 LLC | 70 MW | NM | |
| Jicarilla Solar 2 | 50 MW | NM |
Portfolio membership follows the latest EIA-860 reporting entity. It does not imply ultimate ownership.
View full reporting portfolioBlack & Veatch states that the full agreement was signed in May 2024 and that crews mobilized within four days.
A tornado damaged one of the project's 170 solar arrays during construction; Black & Veatch states that construction momentum continued.
EIA-860 lists generator RRPS with this operating date.
Repsol announced that its 825 MW Pinnington Solar project had reached commercial operations in Texas.
Answered from the published record above. Questions whose inputs this profile does not carry are omitted rather than estimated.
Hecate Energy Longhorn Solar LLC has a reported capacity of 650 MW. Source: EIA Form 860.
Hecate Energy Longhorn Solar LLC is a Solar Photovoltaic facility in Jack County, TX, participating in the ERCOT market.
Hecate Energy Longhorn Solar LLC is in Jack County, TX, inside the ERCOT balancing area.
Hecate Energy Longhorn Solar LLC is operated by Repsol Renewables NA according to the EIA generator inventory. Reporting membership does not by itself establish ultimate ownership.
Hecate Energy Longhorn Solar LLC reported 461.4 GWh over the twelve months to 2026-06. Figures are net generation as filed to EIA-923.
Hecate Energy Longhorn Solar LLC interconnects at Long Hollow Switch, on the Oncor Electric Delivery Company LLC system.
By capacity, Hecate Energy Longhorn Solar LLC ranks #2 of 7,234 operating plants of the same technology nationally. It ranks #1 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.
