ROSAMOND WEST SOLAR
447.3 MW hybrid in Kern, CA · In queue since July 2009 · Proposed COD March 2029
447.3 MW
Capacity
2
Components
Solar + Battery
16y 10m
In Queue
IA Executed
IA Status
Signed Aug 2020
Queue → IA
11y 1m
IA → COD
8y 7m
Total Duration
11y 1m
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: 2029-03-31
The Rosamond West Solar project is a proposed 447.3 MW hybrid solar and battery energy storage project located in Kern County, California. The development project consists of a 299.6 MW solar photovoltaic array coupled with a 147.7 MW battery energy storage system. The project is interconnected to Southern California Edison (SCE) and is in the California Independent System Operator (CAISO) interconnection queue as queue ID CAISO-506, with an original queue entry date of July 31, 2009.
The proposed commercial operation date is March 31, 2029. An Interconnection Agreement (IA) has been executed for the project on August 5, 2020. The point of interconnection (POI) is the Whirlwind Substation at 230kV. The Rosamond West Solar project has been the subject of recent news coverage.
Generated from interconnection queue and public data sources
State
CA
County
Kern
Grid Region
CAISO (California)
Market
ISO/RTO Member
Developer
—
Utility
SCE
Entity
CAISO
Service Type
—
Point of Interconnection
Whirlwind Substation 230kV
Data Source
LBNL + Live
- ISO / RTO
- CAISO
- Trading Hub
- TH_SP15_GEN-APND
- Hub Confidence
- MEDIUM
- Nearest Node (Estimated)
- ASTORIA2_7_N001
- POI Substation
- Whirlwind 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.
Last updated 2026-03-26
View all articles
