Sienna 3
576 MW hybrid in San Bernardino, CA · In queue since April 2023 · Proposed COD December 2031
576 MW
Capacity
2
Components
Solar + Battery
3y 1m
In Queue
Not Started
IA Status
COD target: 2031
Total Duration
8y 8m
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 not yet executed
Typical: 30–60 days (negotiation)
Proposed COD: 2031-12-31
The Sienna 3 project is a proposed 576 MW hybrid solar and battery energy storage project located in San Bernardino County, California. The development project consists of 288 MW of solar photovoltaic generation paired with 288 MW of battery energy storage.
The project, assigned queue ID CAISO-54651, is in the CAISO interconnection queue with an entry date of April 17, 2023. The proposed commercial operation date is December 31, 2031. Interconnection service will be provided by Southern California Edison (SCE) at the CALCITE 230 kV point of interconnection. As of the latest data, the interconnection agreement has not yet been started.
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 230 kV
Data Source
LBNL
- 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.
