CORBY

CAISO-1270BetaActiveBatteryCAISOLBNL + Live

313.5 MW storage in Solano, CA · In queue since May 2016 · Proposed COD June 2027

BA: CISOISO/RTO: CAISONERC: WECCRC: RCW

313.5 MW

Capacity

Components

Battery

10y 2m

In Queue

IA Executed

IA Phase

Signed Jun 2021

Interconnection

Queue → IA

5y 1m

IA → COD

6 years

Total Duration

5y 1m

Study Phase

C09

Construction75%

Queue EntryMay 2, 2016

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 9, 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: 2027-06-01

Cross-source intelligence

Beta

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

Expected COD

2027

From queue filing

Developer

NextEra Energy

Filed as Corby Energy Storage LLC

Status

IA Executed

IA Executed (June 2021) — currently in CEC permitting phase with EIR extension filed March 2026, facing local community opposition

Financing

Secured

PPA with CleanPowerSF announced August 2023 for 300 MW battery storage, providing revenue certainty

Key milestones

IA executedJun 9, 2021

Interconnection Agreement executed with CAISO

source

Financing closeAug 2023

CleanPowerSF signs PPA for 300 MW standalone battery storage project

source

Permit approvedMar 2026

EIR extension request filed with California Energy Commission

source

COD targetJun 2027Most recent

Target commercial operation date per LBNL queue filing

source

Project lifecycle

as of 2026-03-09

OperationalNoThe Press Democrat · 2026-03-09

TechnologyBatteryThe Press Democrat · 2026-03-09

DeveloperNextEra EnergyThe Press Democrat · 2026-03-09

PPA offtakerClean Power SFThe Press Democrat · 2026-03-09

Permit decisionpendingThe Press Democrat · 2026-03-09

About

The CORBY project is a proposed 313.5 MW battery storage project located in Solano County, California. Interconnecting to the PG&E utility, the project is in the CAISO interconnection queue as entry CAISO-1270, with a queue entry date of May 2, 2016. The proposed commercial operation date is June 1, 2027. The project's Interconnection Agreement (IA) was executed on June 9, 2021.

The development project has been the subject of recent news coverage, with seven articles categorized as regulatory, industry, and grid-related.

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

Solano

Grid Region

CAISO (California)

Market

ISO/RTO Member

Developer

—

Utility

PGAE

Entity

CAISO

Service Type

NRIS

Point of Interconnection

Vaca-Dixon 230 kV

Data Source

LBNL + Live

ApplicantCorby Energy Storage LLCThe Press Democrat · 2026-03-09

AgencyCalifornia Energy CommissionThe Press Democrat · 2026-03-09

RulingNoticeThe Press Democrat · 2026-03-09

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_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.

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.

CORBY (CAISO-1270) — Project Summary

CORBY