BOULDER BRUSH HYBRID (CAISO-2177) — Project Summary

Queue ID
CAISO-2177
Capacity
419.71928 MW
Technology
Wind+Battery
Status
active
Location
San Diego, CA
Region
CAISO
Developer
IA Status
System Impact Study

BOULDER BRUSH HYBRID

CAISO-2177BetaActiveWindBatteryCAISOLBNL + Live

419.719 MW hybrid in San Diego, CA · In queue since April 2021 · Proposed COD February 2031

BA: CISOISO/RTO: CAISONERC: WECCRC: RCW

419.719 MW

Capacity

2

Components

Wind + Battery

5y 3m

In Queue

System Impact Study

IA Phase

COD target: 2031

Interconnection

Total Duration

9y 10m

Study Phase

C14

Impact Study25%
Queue EntryApr 15, 2021

Interconnection request submitted to ISO/RTO

Cluster Study (Phase I/II)Current

CAISO uses cluster studies where projects are batched annually and studied together.

Typical: 36–48 months (IR to IA)

Interconnection Agreement

Interconnection agreement not yet executed

Typical: 30–60 days (negotiation)

Commercial Operation

Proposed COD: 2031-02-05

Cross-source intelligence
Beta
Low confidence·4 sources·as of 2026-06-01
Expected COD
2031-02-05
From queue filing
Developer
Status
Active
Active — System Impact Study phase, no construction timeline announced
Financing
Unannounced
Key milestones
IA executedApr 2021Most recent

Entered CAISO queue as Q2177 in System Impact Study phase

source
About

The Boulder Brush Hybrid project is a proposed wind and battery energy storage development with a total capacity of 419.72 MW, located in San Diego County, California. The project consists of 105.8 MW of wind generation capacity and 313.92 MW of battery energy storage. It is being developed within the California Independent System Operator (CAISO) region and has interconnection queue ID CAISO-2177.

The project entered the CAISO interconnection queue on April 15, 2021, and has a proposed commercial operation date of February 5, 2031. Its interconnection status is currently in the System Impact Study phase. The point of interconnection is the Suncrest - Ocotillo 500 kV Line, and the interconnecting utility is San Diego Gas & Electric (SDGE). The Boulder Brush Hybrid project has appeared in recent news coverage.

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

CA

County

San Diego

Grid Region

CAISO (California)

Market

ISO/RTO Member

Developer

Utility

SDGE

Entity

CAISO

Service Type

NRIS

Point of Interconnection

Suncrest - Ocotillo 500 kV Line

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
Technology
Wind105.8 MW · 25%
Battery313.919 MW · 75%
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
CAISO
Trading Hub
TH_ZP26_GEN-APND
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.

No insights available for this project.

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InfraSure platform

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