How big is Hecate Energy Longhorn Solar LLC?

Hecate Energy Longhorn Solar LLC has a reported capacity of 650 MW. Source: EIA Form 860.

What kind of plant is Hecate Energy Longhorn Solar LLC?

Hecate Energy Longhorn Solar LLC is a Solar Photovoltaic facility in Jack County, TX, participating in the ERCOT market.

Where is Hecate Energy Longhorn Solar LLC located?

Hecate Energy Longhorn Solar LLC is in Jack County, TX, inside the ERCOT balancing area.

Who operates Hecate Energy Longhorn Solar LLC?

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.

How much electricity does Hecate Energy Longhorn Solar LLC generate?

Hecate Energy Longhorn Solar LLC reported 132.7 GWh over the twelve months to 2026-04. Figures are net generation as filed to EIA-923.

Where does Hecate Energy Longhorn Solar LLC connect to the grid?

Hecate Energy Longhorn Solar LLC interconnects at Long Hollow Switch, on the Oncor Electric Delivery Company LLC system.

How does Hecate Energy Longhorn Solar LLC compare to other plants?

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.

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Solar PhotovoltaicERCOT · Jack County

Hecate Energy Longhorn Solar LLC

Hecate Energy Longhorn Solar LLC · Jack County · ERCOT

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.

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plant:plant-68839

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Investigate technology, capacity, output, price behavior, ownership, and related facilities using this profile plus current grid data.

Overview

Key fields

Reported capacity: 650 MW
EIA-reported operating capacity; nameplate, seasonal, AC/DC, and unit ratings may differ.
Technology: Solar Photovoltaic
Primary generation technology.
Registry anchor: Plant 68839
Repsol Renewables NA · Jack County · ERCOT
Operating status: Operating
Hecate Energy Longhorn Solar LLC is operating.
Grid connection: Long Hollow Switch
345 kV · Oncor Electric Delivery Company LLC
Commercial operation: May 21, 2026
Best-supported operating milestone.

Profile

Grid role: Utility-scale solar generation in ERCOT's energy-only market.
Grid connection: Long Hollow Switch · 345 kV · Oncor Electric Delivery Company LLC.
Context: Repsol and Black & Veatch describe Pinnington Solar as the largest single renewable project ever to reach commercial operation in ERCOT and among the largest single-injection renewable projects commissioned in the United States.
Physical build: Repsol-developed Pinnington solar facility, engineered and built by Black & Veatch and Overland Contracting Inc.; official project sources report approximately 1.5 million solar panels, 170 solar arrays, and 170 inverters. The matched EIA facility is recorded as a 650 MW, one-unit solar photovoltaic plant.

Structured profile

Reported capacity: 650 MW
Solar Photovoltaic
Commercial operation: May 21, 2026
Operating status: operating
Hecate Energy Longhorn Solar LLC is operating.
Interconnection: Long Hollow Switch
345 kV · Oncor Electric Delivery Company LLC
Location

Units and generators

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

Performance

Monthly EIA generation history and recent market-resource behavior where linked telemetry is available.

Peer context

Technology capacity: 650 MW
National rank: #2
TX rank: #1

Monthly generation

Download CSV

Latest 12 months

132.7 GWh

Reported net generation

Latest report

Apr 2026

EIA-923 monthly filing

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.

Nearby substations

HIFLD infrastructure inventory

UNKNOWN305641

NOT AVAILABLE · 138 kV

0.1 km

UNKNOWN307629

Commercial, land, and environmental record

Source-backed project transactions, agreements, land records, permits, and environmental disclosures. Portfolio and adjacent-project facts remain explicitly scoped.

Transactions and agreements

Tax Incentive Agreement Amended

Dec 16, 2024

Amendment No. 1 to Chapter 313 agreement, effective December 16, 2024, reset tax limitation period start to January 1, 2026. Supplemental payments set at greater of $50,000 or $100 × prior-year average daily attendance. No fixed total payment disclosed.

Bryson Independent School District · Hecate Energy Longhorn Solar LLC

1719-bryson-hecate-amendagmt1

Land and environmental record

Coordinate Parcel

2025

TxGIO parcel 58288; owner BARTON CHAPEL WIND LLC; 12.142 acres; JACK APPRAISAL DISTRICT

Texas Geographic Information Office parcel intersecting EIA plant coordinate (33.04417, -98.34052). Parcel 58288 owned by Barton Chapel Wind LLC. Represents single parcel at coordinate; project spans multiple parcels.

TxGIO land parcel 58288

Coordinate Parcel Area

2025

12.142 Acres

TxGIO parcel intersecting the mapped EIA plant coordinate; parcel 58288; JACK APPRAISAL DISTRICT; tax year 2025

TxGIO land parcel 58288

Coordinate Parcel Id

2025

58288

TxGIO parcel intersecting the mapped EIA plant coordinate; parcel 58288; JACK APPRAISAL DISTRICT; tax year 2025

TxGIO land parcel 58288

Coordinate Parcel Owner

2025

BARTON CHAPEL WIND LLC

TxGIO parcel intersecting the mapped EIA plant coordinate; parcel 58288; JACK APPRAISAL DISTRICT; tax year 2025

TxGIO land parcel 58288

Project Land Area

Dec 16, 2024

Approximately ±13,440 acres

Bryson ISD Chapter 313 amendment describes project land as approximately 13,440-acre tract in Jack County, located approximately 20 miles northwest of Mineral Wells. This is the described reinvestment-zone project boundary, not necessarily the area occupied by solar panels.

1719-bryson-hecate-amendagmt1

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

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AssetOwner / operatorOrganizationContractor

Timeline and sources

Project milestones and public references behind the asset profile.

Project timeline

Nov 29, 2023
Nov 29, 2023
Generation Interconnection AgreementInterchange...
Oncor Electric Delivery Company LLC filed the generation interconnection agreement with Hecate Energy Longhorn Solar LLC, identified as Pinnington Solar.
May 2024

Reporting portfolio

EIA reporting entity

Repsol Renewables NA

Entity 65265

Operating portfolio

4 plants

2 states

Reported capacity

1,135 MW

Batteries · Solar Photovoltaic

Largest reported plants in this portfolio
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 portfolio

Hecate Energy Longhorn Solar LLC

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Hecate Energy Longhorn Solar LLC

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Overview

Key fields

Profile

Structured profile

Units and generators

Performance

Peer context

Monthly generation

Grid and market context

Nearby substations

Commercial, land, and environmental record

Transactions and agreements

Land and environmental record

Related parties and identifiers

Relationship graph

Timeline and sources

Project timeline

Parties and identifiers

Reporting portfolio

Sources

Common questions about Hecate Energy Longhorn Solar LLC

How big is Hecate Energy Longhorn Solar LLC?

What kind of plant is Hecate Energy Longhorn Solar LLC?

Where is Hecate Energy Longhorn Solar LLC located?

Who operates Hecate Energy Longhorn Solar LLC?

How much electricity does Hecate Energy Longhorn Solar LLC generate?

Where does Hecate Energy Longhorn Solar LLC connect to the grid?

How does Hecate Energy Longhorn Solar LLC compare to other plants?

Co-located assets

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