ARATINA SOLAR CENTER 1

CAISO-1204BetaActiveSolarBatteryCAISOLBNL + Live

400 MW hybrid in San Bernardino, CA · In queue since April 2015 · Proposed COD June 2026

BA: CISOISO/RTO: CAISONERC: WECCRC: RCW

400 MW

Capacity

Components

Solar + Battery

11y 3m

In Queue

IA Executed

IA Phase

Signed Aug 2021

Interconnection

Queue → IA

6y 4m

IA → COD

4y 10m

Total Duration

6y 4m

Schedule

1 months past proposed COD

Study Phase

C08

Construction75%

Queue EntryApr 30, 2015

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 AgreementAug 13, 2021

Interconnection agreement executed — binding commitment to build

Typical: 30–60 days (negotiation)

ConstructionCurrent

Project under construction

Typical: 18–30 months

Commercial Operation

Proposed COD: 2026-06-01

Cross-source intelligence

Beta

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

Expected COD

2026

From queue filing

Developer

Avantus

From queue filing

Status

Active

Active — construction financing secured ($500M+ Jul 2025), tax equity closed ($300M Dec 2025), targeting 2026 COD

Financing

Secured

$500M+ construction + tax equity financing closed Jul-Dec 2025; $300M tax equity from Truist Bank (Dec 2025); total >$500M package

Ownership history

—·8minute Solar Energy→Avantussource

Key milestones

IA executedAug 13, 2021

Interconnection Agreement executed with CAISO

source

Permit approvedDec 2021

Project plans altered following Kern County review and local feedback

source

Financing closeJul 2025

Avantus closed >$500M financing for 200 MWac solar + 500 MWh BESS development

source

Financing closeDec 22, 2025

Avantus secured $300M tax equity investment from Truist Bank

source

COD targetJun 2026Most recent

Proposed commercial operation date per LBNL queue

source

Project lifecycle

as of 2024-09-06

PhaseConstructionLos Angeles Times · 2024-09-06

OperationalNoLos Angeles Times · 2024-09-06

TechnologySolar±Los Angeles Times · 2024-09-06

DeveloperAvantusLos Angeles Times · 2024-09-06

GroundbreakingAnnouncedLos Angeles Times · 2024-09-06

Permit decisionGrantedLos Angeles Times · 2024-09-06

About

The Aratina Solar Center 1 is a proposed 400 MW hybrid solar and battery project located in San Bernardino County, California. The development project consists of 200 MW of solar generation paired with 200 MW of battery storage. Interconnection is with Southern California Edison (SCE) via the Kramer Substation 230kV.

The project is in the CAISO interconnection queue as queue ID CAISO-1204, with an original queue entry date of April 30, 2015. The proposed commercial operation date is June 1, 2026, and an Interconnection Agreement (IA) was executed on November 30, 2017. The Aratina Solar Center 1 project has been the subject of 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

San Bernardino

Grid Region

CAISO (California)

Market

ISO/RTO Member

Developer

—

Utility

SCE

Entity

CAISO

Service Type

NRIS

Point of Interconnection

Kramer Substation 230kV

Data Source

LBNL + Live

DeveloperAvantusMercom Capital Group · 2025-12-22

ApplicantAvantusLos Angeles Times · 2024-09-06

AgencyKern County Board of Supervisors±pv magazine USA · 2024-06-03

RulingApprovalLos Angeles Times · 2024-09-06

TransactionTax equity±Mercom Capital Group · 2025-12-22

Deal value$300.0M±Mercom Capital Group · 2025-12-22

OfftakerTruist BankMercom Capital Group · 2025-12-22

LenderTruist Bank±Mercom Capital Group · 2025-12-22

PPA structureCommunityEnergy-Storage.News · 2025-07-07

PPA term20 yearsEnergy-Storage.News · 2025-07-07

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

Solar200 MW · 50%

Battery200 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
Nearest Node (Estimated): KRAMER_1_N001
POI Substation: Kramer 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 (7)Beta

Last updated 2026-03-26

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ARATINA SOLAR CENTER 1 (CAISO-1204) — Project Summary

ARATINA SOLAR CENTER 1