Bexar ESS

ERCOT-23INR0381BetaActiveBatteryERCOTLBNL

102.6 MW storage in Bexar, TX · In queue since September 2021 · Proposed COD December 2025

BA: ERCOISO/RTO: ERCOTNERC: TRERC: ERCOT

102.6 MW

Capacity

Components

Battery

4y 10m

In Queue

IA Executed

IA Phase

Signed Jul 2023

Interconnection

Queue → IA

1y 10m

IA → COD

2y 5m

Total Duration

1y 10m

Schedule

6 months past proposed COD

Construction75%

Queue EntrySep 21, 2021

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 31, 2023

Interconnection agreement executed — binding commitment to build

Typical: 30–60 days (negotiation)

ConstructionCurrent

Project under construction

Typical: 6–18 months

Commercial Operation

Proposed COD: 2025-12-31

Cross-source intelligence

Beta

High confidence·7 sources·as of 2026-06-01

Expected COD

2027

Queue date 1–2 years staleQueue: 2025-12-31

Developer

OCI Energy

Filed as Bexar ESS LLC

Status

Construction

Construction — groundbreaking occurred May 2026, targeting 2027 COD per developer announcement

Financing

Secured

20-year PPA with CPS Energy announced December 2024, project financed and under construction as of May 2026 groundbreaking

Key milestones

IA executedJul 31, 2023

Interconnection Agreement executed with ERCOT

source

Financing closeDec 6, 2024

20-year PPA announced with CPS Energy for 120MW/480MWh Alamo City ESS project

source

GroundbreakingMay 20, 2026

OCI Energy breaks ground on Alamo City ESS project in Bexar County

source

COD target2027Most recent

Project targeting 2027 commercial operation per groundbreaking announcement

source

Project lifecycle

as of 2024-12-06

TechnologyBatteryCPS Energy Newsroom · 2024-12-06

DeveloperOCI EnergyCPS Energy Newsroom · 2024-12-06

PPA offtakerCPS EnergyCPS Energy Newsroom · 2024-12-06

About

The Bexar ESS project is a proposed 102.6 MW battery storage project located in Bexar County, Texas. Developed by Bexar ESS LLC, the project consists entirely of battery storage. It is interconnected within the ERCOT region under queue ID ERCOT-23INR0381, with an interconnection queue entry date of September 21, 2021. The proposed commercial operation date is February 10, 2026, and the Interconnection Agreement was executed on July 31, 2023.

The project is linked to the existing Bexar ESS operating plant (EIA plant ID 66400). The Bexar ESS project has been mentioned in recent news coverage.

Generated from interconnection queue and public data sources

ERCOT Queue EIA Plant Profile

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.

Available on the InfraSure platform

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

Bexar

Grid Region

ERCOT (Texas)

Market

ISO/RTO Member

Developer

Bexar ESS LLC

Utility

—

Entity

ERCOT

Service Type

—

Point of Interconnection

5007 Alamo One 138kV

Data Source

LBNL

DeveloperOCI EnergyCPS Energy Newsroom · 2024-12-06

TransactionPPACPS Energy Newsroom · 2024-12-06

OfftakerCPS EnergyCPS Energy Newsroom · 2024-12-06

PPA structurePhysicalCPS Energy Newsroom · 2024-12-06

PPA term20 yearsCPS Energy Newsroom · 2024-12-06

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.

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 — 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.

Available on the InfraSure platform

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_SOUTH
Hub Confidence: HIGH
Nearest Node (Estimated): RN_OCI_ALAMO
POI Substation: OCI Alamo 1

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.

Linked EIA Plant

Bexar ESSEIA 66400

High match89% confidence

View Plant

Insights & Articles (1)Beta

Last updated 2026-03-26

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InfraSure platform

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

Bexar ESS (ERCOT-23INR0381) — Project Summary

Bexar ESS