SEAHAWK STORAGE

CAISO-1865BetaActiveBatteryCAISOLBNL + Live

203.699 MW storage in Santa Cruz, CA · In queue since April 2021 · Proposed COD September 2029

BA: CISOISO/RTO: CAISONERC: WECCRC: RCW

203.699 MW

Capacity

Components

Battery

5y 3m

In Queue

IA Executed

IA Phase

Signed Nov 2024

Status

as of 18 months ago

Latest activityConstruction startKSBW · 2025-01-23

Expected COD2029KSBW · 2025-01-23

Interconnection

Queue → IA

3y 7m

IA → COD

4y 10m

Total Duration

3y 7m

Study Phase

C14

Construction75%

Queue EntryApr 15, 2021

Interconnection request submitted to ISO/RTO

Cluster Study (Phase I/II)

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

Typical: 36–48 months (IR to IA)

Interconnection AgreementNov 24, 2024

Interconnection agreement executed — binding commitment to build

Typical: 30–60 days (negotiation)

ConstructionCurrent

Project under construction

Typical: 6–18 months

Commercial Operation

Proposed COD: 2029-09-18

Cross-source intelligence

Beta

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

Expected COD

2029

From queue filing

Developer

New Leaf Energy

From queue filing

Status

IA Executed

IA Executed (Nov 2024) — project in permitting phase, developer pivoting to state approval route as of May 2026 to bypass county process

Financing

Unannounced

Key milestones

IA executedNov 24, 2024

Interconnection Agreement executed with CAISO

source

Permit approvedMay 2026Most recent

Developer pivots to state approval route, bypassing Santa Cruz County permitting process

source

Project lifecycle

as of 2025-10-27

Phaseia_pendingKSBW · 2025-01-23

OperationalNoSanta Cruz Sentinel · 2025-10-27

TechnologyBatterySanta Cruz Sentinel · 2025-10-27

DeveloperNew Leaf EnergySanta Cruz Sentinel · 2025-10-27

Permit decisionpendingSanta Cruz Sentinel · 2025-10-27

About

SEAHAWK STORAGE is a proposed 203.7 MW battery storage project located in Santa Cruz County, California. The project is in the CAISO interconnection queue as entry CAISO-1865, with a queue entry date of April 15, 2021, and a proposed commercial operation date of September 18, 2029. The interconnection agreement has been executed. The project is interconnected to the PG&E utility grid at the Green Valley 115 kV point of interconnection.

The SEAHAWK STORAGE project has been the subject of recent news coverage, with four articles appearing in industry, development, and regulatory publications.

Generated from interconnection queue and public data sources

CAISO 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

Santa Cruz

Grid Region

CAISO (California)

Market

ISO/RTO Member

Developer

—

Utility

PGAE

Entity

CAISO

Service Type

NRIS

Point of Interconnection

Green Valley 115 kV

Data Source

LBNL + Live

DeveloperNew Leaf EnergySanta Cruz Sentinel · 2025-10-27

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: CAISO
Trading Hub: TH_ZP26_GEN-APND
Hub Confidence: MEDIUM
Nearest Node (Estimated): GRNVALY_1_N025
POI Substation: Green Valley 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.

Insights & Articles (2)Beta

Last updated 2026-03-26

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InfraSure platform

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

SEAHAWK STORAGE (CAISO-1865) — Project Summary

SEAHAWK STORAGE