Duffy BESS

ERCOT-26INR0250BetaActiveBatteryBatteryERCOTLBNL + Live

241.05 MW generation in Matagorda, TX · In queue since August 2023 · Proposed COD December 2026

BA: ERCOISO/RTO: ERCOTNERC: TRERC: ERCOT

241.05 MW

Capacity

Components

Battery

2y 11m

In Queue

IA Executed

IA Phase

Signed Jul 2025

Interconnection

Queue → IA

1y 11m

IA → COD

1y 5m

Total Duration

1y 11m

Construction75%

Queue EntryAug 21, 2023

Interconnection request submitted to ISO/RTO

Interconnection Study

ERCOT uses a serial "connect and manage" approach — fastest among major ISOs.

Typical: 18–30 months (fastest major ISO)

Interconnection AgreementJul 28, 2025

Interconnection agreement executed — binding commitment to build

Typical: 30–60 days (negotiation)

ConstructionCurrent

Project under construction

Typical: 18–30 months

Commercial Operation

Proposed COD: 2026-12-31

Cross-source intelligence

Beta

High confidence·8 sources·as of 2026-06-01

Expected COD

2026-12-31

From queue filing

Developer

Linea Energy

Filed as Duffy Energy Storage LLC

Status

IA Executed

IA Executed — project debt financing closed Dec 2025, preferred equity from DESRI signed Feb 2026, construction advancing toward 2026 COD

Financing

Secured

Project debt financing closed Dec 2025; DESRI preferred equity investment signed Feb 2026 for 235MW/470MWh facility

Key milestones

IA executedJul 28, 2025

Interconnection Agreement executed with ERCOT

source

Financing closeDec 2025

Linea Energy secured project debt financing for 235MW/470MWh Duffy BESS

source

Financing closeFeb 18, 2026

DESRI signed preferred equity investment in Duffy BESS

source

COD targetDec 31, 2026Most recent

Proposed commercial operation date per ERCOT queue

source

About

The Duffy BESS project is a proposed 235.9 MW battery storage project located in Matagorda County, Texas. Developed by Duffy Energy Storage LLC, the project consists entirely of battery storage. It is currently active in the ERCOT interconnection queue as entry ERCOT-26INR0250, with a queue entry date of August 21, 2023. The proposed commercial operation date is December 31, 2026, and the project's interconnection agreement status is currently in the Facility Study phase.

The Duffy BESS project has been the subject of recent news coverage, with 29 articles related to the project appearing in the news, primarily focusing on deals and development.

Generated from interconnection queue and public data sources

ERCOT Queue

Development Risk

Realization risk from now to commercial operation — financing close, EPC and tax-equity counterparty mix, and COD probability vs the proposed date. The diligence view that determines whether the deal actually closes. Powered by InfraSure's development-stage modeling stack.

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See the full development-risk decomposition for this project.

P(COD by stated date)

Financing close probability

EPC + tax-equity counterparty

Project Details

State

County

Matagorda

Grid Region

ERCOT (Texas)

Market

ISO/RTO Member

Developer

Duffy Energy Storage LLC

Utility

—

Entity

ERCOT

Service Type

—

Point of Interconnection

Tap 345kV WAP to STP CKT39 (PTI# 5915-44000 CKT 39)

Data Source

LBNL + Live

Risk Analytics

Composite operating-phase risk view — what this asset's risk profile will look like once it commissions. Climate hazards across its operating life, expected generation variability, and offtake counterparty exposure, decomposed into a single decision-grade score. Powered by InfraRisk.

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See the full risk decomposition + scenarios for this project.

Climate hazards (8+)

Generation variability (P10/P50/P90)

Offtake + transmission counterparty

Generation Forecast

Forward generation outlook — first-year production estimate and 10-year P50 trajectory, with probabilistic ranges (P10/P50/P90) across weather, demand, and policy scenarios. Powered by InfraSure's generation modeling stack.

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See the full forecast + scenario decomposition for this project.

10-year P50 forecast

First-year output estimate

Weather + policy scenarios

Financial Forecast

Forward revenue, DSCR projection, and financing-close risk — conditioned on commercial operation. First-year DSCR, 10-year cashflow, and counterparty exposure across price and policy scenarios. Powered by InfraSure's asset cashflow stack.

Available on the InfraSure platform

See the full revenue + DSCR projection for this project.

10-year revenue projection

First-year DSCR

Financing close risk

Market Context

Approximate

ISO / RTO: ERCOT
Trading Hub: HB_NORTH
Hub Confidence: LOW

This project's market context is estimated from its Point of Interconnection. Hub and node assignments are approximate and based on geographic inference from the POI substation name.

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InfraSure platform

Forward forecasts, scenario decomposition, and risk-decision tooling for this queue project.

Duffy BESS (ERCOT-26INR0250) — Project Summary

Duffy BESS