ARATINA SOLAR CENTER 1

CAISO-1204BetaActiveSolarBatteryCAISOLBNL + Live

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

400 MW

Capacity

Components

Solar + Battery

11y 1m

In Queue

IA Executed

IA Status

Signed Nov 2017

Interconnection

Queue → IA

2y 7m

IA → COD

8y 7m

Total Duration

2y 7m

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 AgreementNov 30, 2017

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

Technology

Solar200 MW · 50%

Battery200 MW · 50%

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

Project Details

State

County

San Bernardino

Grid Region

CAISO (California)

Market

ISO/RTO Member

Developer

—

Utility

SCE

Entity

CAISO

Service Type

—

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 Bank±Mercom Capital Group · 2025-12-22

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

PPA structurePhysical±Renewables Now · 2025-11-20

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

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.

News & Articles (6)Beta

Last updated 2026-03-26

View all 6 articles

No ask pi reports yet for this entity.

ask pi about ARATINA SOLAR CENTER 1

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

ARATINA SOLAR CENTER 1