Pianissimo BESS II (ERCOT-26INR0329) — Project Summary

Queue ID
ERCOT-26INR0329
Capacity
202 MW
Technology
Battery
Status
active
Location
Wise, TX
Region
ERCOT
Developer
Pianissimo Storage, LLC
IA Status
Facility Study

Pianissimo BESS II

ERCOT-26INR0329BetaActiveBatteryERCOTLBNL + Live

202 MW storage in Wise, TX · In queue since November 2024 · Proposed COD December 2027

BA: ERCOISO/RTO: ERCOTNERC: TRERC: ERCOT

202 MW

Capacity

1

Components

Battery

1y 8m

In Queue

Facility Study

IA Phase

COD target: 2027

Interconnection

Total Duration

3y 1m

Facilities Study50%
Queue EntryNov 19, 2024

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: 2027-12-31

Cross-source intelligence
Beta
Low confidence·3 sources·as of 2026-06-01
Expected COD
2027-12-31
From queue filing
Developer
Pianissimo Storage, LLC
From queue filing
Status
Active
Active — Facility Study stage, no IA executed yet. Build probability estimated at 5% by ERCOT queue trackers.
Financing
Unannounced
Key milestones
COD targetSep 13, 2026

Original proposed completion date before revision to Dec 2027

source
COD targetDec 30, 2027Most recent

Revised proposed completion date per Feb 2025 queue update

source
About

Pianissimo BESS II is a proposed 202 MW battery storage project located in Wise County, Texas. The project, developed by Pianissimo Storage, LLC, is interconnected within the ERCOT region under queue ID ERCOT-26INR0329. It entered the interconnection queue on November 19, 2024, and has a proposed commercial operation date of December 31, 2027. The project's interconnection status is currently in the Facility Study phase.

The proposed project consists entirely of battery storage, with a total capacity of 202 MW. The point of interconnection is Tap 138kV 685 LEO - 587 GREENWOOD. The project has appeared in recent news coverage.

Generated from interconnection queue and public data sources

ERCOT Queue
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

Wise

Grid Region

ERCOT (Texas)

Market

ISO/RTO Member

Developer

Pianissimo Storage, LLC

Utility

—

Entity

ERCOT

Service Type

—

Point of Interconnection

Tap 138kV 685 LEO - 587 GREENWOOD

Data Source

LBNL + Live

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_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.