BIG SKY SOLAR
483.4 MW hybrid in Los Angeles, CA · In queue since March 2011 · Proposed COD January 2023
483.4 MW
Capacity
2
Components
Solar + Battery
15y 2m
In Queue
IA Executed
IA Status
Signed Sep 2014
Queue → IA
3y 6m
IA → COD
8y 4m
Total Duration
3y 6m
Schedule
40 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: 2023-01-31
BIG SKY SOLAR is a proposed 483.4 MW hybrid solar and battery energy storage project located in Los Angeles County, California. The development project consists of a 320 MW solar photovoltaic array coupled with a 163.4 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-768, with an original queue entry date of March 31, 2011. The proposed commercial operation date was January 31, 2023.
The project's interconnection agreement (IA) has been executed as of September 10, 2014. The point of interconnection (POI) is the Antelope Substation 230kV bus. The BIG SKY SOLAR project has been the subject of recent news coverage.
Generated from interconnection queue and public data sources
State
CA
County
Los Angeles
Grid Region
CAISO (California)
Market
ISO/RTO Member
Developer
—
Utility
SCE
Entity
CAISO
Service Type
—
Point of Interconnection
Antelope Substation 230kV bus
Data Source
LBNL + Live
- ISO / RTO
- CAISO
- Trading Hub
- TH_SP15_GEN-APND
- Hub Confidence
- MEDIUM
- Nearest Node (Estimated)
- BIGSK230_2_N022
- POI Substation
- Antelope 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
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