WILDHORSE ENERGY CENTER (CAISO-1846) — Project Summary

Queue ID
CAISO-1846
Capacity
121.55 MW
Technology
Battery
Status
active
Location
Sonoma, CA
Region
CAISO
Developer
IA Status
System Impact Study

WILDHORSE ENERGY CENTER

CAISO-1846BetaActiveBatteryCAISOLBNL + Live

121.55 MW storage in Sonoma, CA · In queue since April 2021 · Proposed COD May 2030

BA: CISOISO/RTO: CAISONERC: WECCRC: RCW

121.55 MW

Capacity

1

Components

Battery

5y 3m

In Queue

System Impact Study

IA Phase

COD target: 2030

Interconnection

Total Duration

9y 1m

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: 2030-05-04

Cross-source intelligence
Beta
Low confidence·3 sources·as of 2026-06-01
Expected COD
2030
From queue filing
Developer
Status
Active
Active — System Impact Study phase, no public construction timeline announced
Financing
Unannounced
About

The Wildhorse Energy Center is a proposed 121.55 MW battery storage project located in Sonoma County, California. The project, under development in the CAISO region, consists entirely of battery storage. It is interconnected to the PGAE utility grid at the Fulton 230 kV point of interconnection.

The project, identified as CAISO-1846 in the CAISO interconnection queue, entered the queue on April 15, 2021. Its proposed commercial operation date is May 4, 2030, and its interconnection status is currently in the System Impact Study phase. The Wildhorse Energy Center has been the subject of recent news coverage, with eight articles focusing on regulatory and industry aspects of 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.

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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

Sonoma

Grid Region

CAISO (California)

Market

ISO/RTO Member

Developer

Utility

PGAE

Entity

CAISO

Service Type

NRIS

Point of Interconnection

Fulton 230 kV

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
CAISO
Trading Hub
TH_NP15_GEN-APND
Hub Confidence
MEDIUM
Nearest Node (Estimated)
FULTON_1_N020
POI Substation
Fulton 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.

No insights available for this project.

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InfraSure platform

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