HUMIDOR STORAGE 1 (CAISO-1629) — Project Summary

Queue ID
CAISO-1629
Capacity
305 MW
Technology
Battery
Status
active
Location
Los Angeles, CA
Region
CAISO
Developer
IA Status
IA Executed

HUMIDOR STORAGE 1

CAISO-1629BetaActiveBatteryCAISOLBNL + Live

305 MW storage in Los Angeles, CA · In queue since April 2019 · Proposed COD October 2028

BA: CISOISO/RTO: CAISONERC: WECCRC: RCW

305 MW

Capacity

1

Components

Battery

7y 3m

In Queue

IA Executed

IA Phase

Signed Jun 2021

Interconnection

Queue → IA

2y 2m

IA → COD

7y 4m

Total Duration

2y 2m

Study Phase

C12

Construction75%
Queue EntryApr 15, 2019

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 AgreementJun 28, 2021

Interconnection agreement executed — binding commitment to build

Typical: 30–60 days (negotiation)

ConstructionCurrent

Project under construction

Typical: 6–18 months

Commercial Operation

Proposed COD: 2028-10-01

Cross-source intelligence
Beta
High confidence·5 sources·as of 2026-06-01
Expected COD
Developer
Hecate Grid
Filed as Hecate Grid Humidor Storage 1 LLC
Status
Suspended
Active in queue but judicially blocked — LA Superior Court halted project October 2025 pending environmental review challenges
Financing
Unannounced
Key milestones
IA executedJun 28, 2021

Interconnection Agreement executed with CAISO

source
Permit approvedSep 2022

Local approval granted by Los Angeles County; utility off-take contract signed for 300MW/1,200MWh system

source
WithdrawnOct 2025Most recent

LA Superior Court judge blocks project, siding with Acton residents on environmental review deficiencies

source
Project lifecycle
as of 2024-05-17
OperationalNoSanta Clarita Valley Signal · 2024-05-17
TechnologyBatterySanta Clarita Valley Signal · 2024-05-17
DeveloperHecateSanta Clarita Valley Signal · 2024-05-17
Permit decisionGrantedSanta Clarita Valley Signal · 2024-05-17
About

The Humidor Storage 1 project is a proposed 305 MW battery storage project located in Los Angeles County, California. Interconnecting to Southern California Edison (SCE), the project is in the CAISO queue as queue ID CAISO-1629, with an entry date of April 15, 2019. The proposed commercial operation date is October 1, 2028. An Interconnection Agreement (IA) was executed on June 28, 2021. The point of interconnection (POI) is the Vincent Substation 230 kV.

The project is linked to the existing Humidor Storage I operating plant (EIA plant ID 65703). Humidor Storage 1 has been the subject of recent news coverage, with 9 articles categorized as industry, deals, grid, and regulatory topics.

Generated from interconnection queue and public data sources

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

CA

County

Los Angeles

Grid Region

CAISO (California)

Market

ISO/RTO Member

Developer

Utility

SCE

Entity

CAISO

Service Type

NRIS

Point of Interconnection

Vincent Substation 230 kV

Data Source

LBNL + Live

ApplicantPrairie Song Reliability Project, LLC±avpress.com · 2026-01-09
AgencyLos Angeles Countyavpress.com · 2026-01-09
RulingNotice±avpress.com · 2026-01-09
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_SP15_GEN-APND
Hub Confidence
MEDIUM

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