SIENNA SOLAR FARM
400 MW hybrid in San Bernardino, CA · In queue since April 2015 · Proposed COD January 2027
400 MW
Capacity
2
Components
Solar + Battery
11y 1m
In Queue
IA Executed
IA Status
Signed Nov 2017
Queue → IA
2y 7m
IA → COD
9y 2m
Total Duration
2y 7m
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: 2027-01-28
The Sienna Solar Farm 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 capacity coupled with 200 MW of battery storage. Interconnection for the project is being managed through the CAISO queue under queue ID CAISO-1207. The project entered the queue on April 30, 2015, and has a proposed commercial operation date of January 28, 2027.
The project has an executed Interconnection Agreement (IA), dated November 7, 2017. The point of interconnection (POI) is the Calcite Substation at 230kV, and the interconnecting utility is Southern California Edison (SCE). The Sienna Solar Farm has been the subject of recent news coverage related to regulatory matters.
Generated from interconnection queue and public data sources
State
CA
County
San Bernardino
Grid Region
CAISO (California)
Market
ISO/RTO Member
Developer
—
Utility
SCE
Entity
CAISO
Service Type
—
Point of Interconnection
Calcite Substation 230kV
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.
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