Bottom Grass BESS

ERCOT-23INR0083BetaActiveBatteryBatteryERCOTLBNL

202.21 MW generation in Colorado, TX · In queue since November 2020 · Proposed COD March 2028

BA: ERCOISO/RTO: ERCOTNERC: TRERC: ERCOT

202.21 MW

Capacity

Components

Battery

5y 8m

In Queue

IA Executed

IA Phase

Signed Jun 2023

Interconnection

Queue → IA

2y 7m

IA → COD

4y 9m

Total Duration

2y 7m

Construction75%

Queue EntryNov 5, 2020

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 AgreementJun 29, 2023

Interconnection agreement executed — binding commitment to build

Typical: 30–60 days (negotiation)

ConstructionCurrent

Project under construction

Typical: 18–30 months

Commercial Operation

Proposed COD: 2028-03-01

Cross-source intelligence

Beta

High confidence·4 sources·as of 2026-06-01

Expected COD

2027

Queue date 1–2 years staleQueue: 2028-03-01

Developer

Bottom Grass Solar Project, LLC

From queue filing

Status

Withdrawn

Withdrawn — interconnection.fyi (Result 2) explicitly states project is 'currently withdrawn in the ERCOT' queue, contradicting LBNL's 'active' status

Financing

Unannounced

Key milestones

Withdrawn

Project withdrawn from ERCOT interconnection queue per interconnection.fyi database

source

IA executedJun 29, 2023Most recent

Interconnection Agreement executed per LBNL data, confirmed in ERCOT buildout report showing 'IA' status

source

About

The Bottom Grass BESS project is a proposed 202.21 MW battery storage project located in Colorado County, Texas. The developer is Bottom Grass Solar Project, LLC. The project is interconnected within the ERCOT region under queue ID ERCOT-23INR0083, with an interconnection queue entry date of November 5, 2020. The proposed commercial operation date is December 1, 2026.

The interconnection agreement for the Bottom Grass BESS project was executed on June 29, 2023. The project has been the subject of recent news coverage.

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.

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

Colorado

Grid Region

ERCOT (Texas)

Market

ISO/RTO Member

Developer

Bottom Grass Solar Project, LLC

Utility

—

Entity

ERCOT

Service Type

—

Point of Interconnection

tap 345 kV 9073 Holman - 44200 Hillje

Data Source

LBNL

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.

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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_SOUTH
Hub Confidence: MEDIUM
POI Substation: Holman 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.

Bottom Grass BESS (ERCOT-23INR0083) — Project Summary

Bottom Grass BESS