SCARLET
800 MW hybrid in Fresno, CA · In queue since April 2015 · Proposed COD December 2025
800 MW
Capacity
2
Components
Solar + Battery
11y 1m
In Queue
IA Executed
IA Status
Signed Nov 2017
Queue → IA
2y 7m
IA → COD
8y 1m
Total Duration
2y 7m
Schedule
4 months past proposed COD
Interconnection request submitted to ISO/RTO
CAISO uses cluster studies where projects are batched annually and studied together.
Typical: 36–48 months (IR to IA)
Interconnection agreement executed — binding commitment to build
Typical: 30–60 days (negotiation)
Project under construction
Typical: 18–30 months
Proposed COD: 2025-12-23
The SCARLET project is a proposed 800 MW hybrid solar and battery energy storage development in Fresno County, California. The project consists of 400 MW of solar photovoltaic generation paired with 400 MW of battery storage. It is located within the CAISO balancing authority and interconnects to the PG&E utility grid at the Tranquility 230 kV point of interconnection.
The project, identified as CAISO-1135 in the CAISO interconnection queue, entered the queue on April 30, 2015, and has a proposed commercial operation date of December 23, 2025. An Interconnection Agreement (IA) for the project was executed on November 1, 2017. The SCARLET project has been the subject of recent news coverage.
Generated from interconnection queue and public data sources
State
CA
County
Fresno
Grid Region
CAISO (California)
Market
ISO/RTO Member
Developer
—
Utility
PGAE
Entity
CAISO
Service Type
—
Point of Interconnection
Tranquility 230 kV
Data Source
LBNL + Live
- 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.
Last updated 2026-03-26
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