UMBRIEL

CAISO-2166BetaActiveSolarBatteryCAISOLBNL + Live

2,364.76 MW hybrid in Imperial, CA · In queue since April 2021 · Proposed COD September 2033

BA: CISOISO/RTO: CAISONERC: WECCRC: RCW

2,364.76 MW

Capacity

Components

Solar + Battery

5y 3m

In Queue

IA Executed

IA Phase

COD target: 2033

Interconnection

Total Duration

12y 5m

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 Agreement

Interconnection agreement executed — binding commitment to build

Typical: 30–60 days (negotiation)

ConstructionCurrent

Project under construction

Typical: 18–30 months

Commercial Operation

Proposed COD: 2033-09-15

Cross-source intelligence

Beta

High confidence·6 sources·as of 2026-06-01

Expected COD

2024

Queue date 3+ years staleQueue: 2033-09-15

Developer

Longroad Energy

From queue filing

Status

Online

Online — facility operational in Polk County, TX as of 2024; LBNL queue entry appears to reference a different CA project or is severely outdated

Financing

Secured

Financing closed Feb 2023, construction commenced. Lead arranger: Zions Capital Markets. PPA with Entergy Texas for 150 MWac output.

Key milestones

Financing closeFeb 2023

Longroad Energy completed financing and commenced construction of 202 MWdc Umbriel Solar project

source

GroundbreakingFeb 2023

Construction began on 202 MWDC/150 MWAC PV project in Polk County, Texas

source

COD target2024Most recent

Facility operational and providing power to Entergy Texas customers

source

About

The UMBRIEL project is a proposed 2364.76 MW hybrid solar and battery energy storage project located in Imperial County, California. The development project consists of 1182.38 MW of solar generation capacity coupled with 1182.38 MW of battery storage. The project is interconnected to the San Diego Gas & Electric (SDGE) grid within the California Independent System Operator (CAISO) region.

The project, identified as CAISO-2166 in the CAISO interconnection queue, entered the queue on April 15, 2021, and has a proposed commercial operation date of June 5, 2035. Its interconnection status is currently in the System Impact Study phase. The point of interconnection is the North Gila - Imperial Valley 500 kV Line. The UMBRIEL project has been mentioned in recent news coverage.

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

Imperial

Grid Region

CAISO (California)

Market

ISO/RTO Member

Developer

—

Utility

SDGE

Entity

CAISO

Service Type

NRIS

Point of Interconnection

North Gila - Imperial Valley 500 kV Line

Data Source

LBNL + Live

DeveloperLongroad EnergyPR Newswire · 2023-02-07

TransactionProject financingPR Newswire · 2023-02-07

OfftakerEntergy Texas Inc.PR Newswire · 2023-02-07

LenderZions Capital MarketsPR Newswire · 2023-02-07

PPA structurePhysicalPR Newswire · 2023-02-07

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

Technology

Solar1,182.38 MW · 50%

Battery1,182.38 MW · 50%

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
POI Substation: Imperial Dam

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 (1)Beta