Maximino Road BESS (ERCOT-28INR0346) — Project Summary

Queue ID
ERCOT-28INR0346
Capacity
206 MW
Technology
Battery
Status
active
Location
Comal, TX
Region
ERCOT
Developer
Horizon Energy Storage Greenfield Project Holdings LLC
IA Status
Facility Study

Maximino Road BESS

ERCOT-28INR0346BetaActiveBatteryERCOTLBNL

206 MW storage in Comal, TX · In queue since March 2025 · Proposed COD May 2028

BA: ERCOISO/RTO: ERCOTNERC: TRERC: ERCOT

206 MW

Capacity

1

Components

Battery

1y 4m

In Queue

Facility Study

IA Phase

COD target: 2028

Interconnection

Total Duration

3y 2m

Facilities Study50%
Queue EntryMar 24, 2025

Interconnection request submitted to ISO/RTO

Interconnection StudyCurrent

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

Typical: 18–30 months (fastest major ISO)

Interconnection Agreement

Interconnection agreement not yet executed

Typical: 30–60 days (negotiation)

Commercial Operation

Proposed COD: 2028-05-31

Cross-source intelligence
Beta
Low confidence·0 sources·as of 2026-06-01
Expected COD
2028-05-31
From queue filing
Developer
Horizon Energy Storage
Filed as Horizon Energy Storage Greenfield Project Holdings LLC
Status
Active
Active — early-stage development in Facility Study phase, no construction timeline announced
Financing
Unannounced
Key milestones
IA executedMar 24, 2025Most recent

Entered ERCOT interconnection queue, Facility Study phase

About

The Maximino Road BESS project is a proposed 206 MW hybrid battery energy storage system in Comal County, Texas. Developed by Horizon Energy Storage Greenfield Project Holdings LLC, the project entered the ERCOT interconnection queue as ERCOT-28INR0346 on March 24, 2025. The current proposed commercial operation date is May 31, 2028, and the point of interconnection is the 7170 BERGHEIM 138kV substation.

The Maximino Road BESS project is listed as an active project in the ERCOT queue. Recent news coverage indicates activity related to deals involving the project.

Generated from interconnection queue and public data sources

Development Risk

Realization risk before commercial operation — cluster-study clearance, IA timing, counterparty mix, and withdrawal probability vs cohort. The diligence view that determines whether this project is worth pursuing. Powered by InfraSure's development-stage modeling stack.

Available on the InfraSure platform

See the full development-risk decomposition for this project.

P(COD by stated date)
Withdrawal probability vs cohort
IA cluster risk
Project Details

State

TX

County

Comal

Grid Region

ERCOT (Texas)

Market

ISO/RTO Member

Developer

Horizon Energy Storage Greenfield Project Holdings LLC

Utility

Entity

ERCOT

Service Type

Point of Interconnection

7170 BERGHEIM 138kV

Data Source

LBNL

Risk Analytics

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

Available on the InfraSure platform

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 — what this project would produce assuming it reaches commercial operation. Probabilistic ranges (P10/P50/P90) across weather, demand, and policy scenarios, conditioned on the proposed COD. Powered by InfraSure's generation modeling stack.

Available on the InfraSure platform

See the full forecast + scenario decomposition for this project.

P50 conditioned on COD
Capacity factor vs cohort
Weather + policy scenarios
Financial Forecast

Forward revenue, DSCR projection, and financing-close risk — conditioned on commercial operation. The bankability view that determines whether the deal clears its covenants once online. Powered by InfraSure's asset cashflow stack.

Available on the InfraSure platform

See the full revenue + DSCR projection for this project.

Revenue conditioned on COD
Financing close risk
Cohort DSCR comparison
Market Context
Approximate
ISO / RTO
ERCOT
Trading Hub
HB_SOUTH
Hub Confidence
MEDIUM
POI Substation
Bergheim Substation

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.