SOLAR STAR 4
50 MW hybrid in Kern, CA · In queue since May 2016 · Proposed COD July 2026
50 MW
Capacity
2
Components
Solar + Battery
10y 2m
In Queue
IA Executed
IA Phase
Signed Oct 2019
Queue → IA
3y 5m
IA → COD
6y 9m
Total Duration
3y 5m
Schedule
0 months past proposed COD
Study Phase
C09
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: 2026-07-07
The SOLAR STAR 4 project is a proposed 50 MW hybrid solar and battery energy storage project located in Kern County, California. The development project, consisting of 25.05 MW of solar capacity and 24.95 MW of battery storage, is interconnected to the CAISO grid via Southern California Edison (SCE) at the Whirlwind Substation 230kV.
The project, identified as CAISO-1323 in the CAISO interconnection queue, entered the queue on May 2, 2016, and has a proposed commercial operation date of August 12, 2026. An Interconnection Agreement (IA) was executed on October 11, 2019. The SOLAR STAR 4 project has been the subject of recent news coverage.
Generated from interconnection queue and public data sources
Realization risk from now to commercial operation — financing close, EPC and tax-equity counterparty mix, and COD probability vs the proposed date. The diligence view that determines whether the deal actually closes. Powered by InfraSure's development-stage modeling stack.
See the full development-risk decomposition for this project.
State
CA
County
Kern
Grid Region
CAISO (California)
Market
ISO/RTO Member
Developer
—
Utility
SCE
Entity
CAISO
Service Type
NRIS
Point of Interconnection
Whirlwind Substation 230kV
Data Source
LBNL + Live
Composite operating-phase risk view — what this asset's risk profile will look like once it commissions. Climate hazards across its operating life, expected generation variability, and offtake counterparty exposure, decomposed into a single decision-grade score. Powered by InfraRisk.
See the full risk decomposition + scenarios for this project.
Forward generation outlook — first-year production estimate and 10-year P50 trajectory, with probabilistic ranges (P10/P50/P90) across weather, demand, and policy scenarios. Powered by InfraSure's generation modeling stack.
See the full forecast + scenario decomposition for this project.
Forward revenue, DSCR projection, and financing-close risk — conditioned on commercial operation. First-year DSCR, 10-year cashflow, and counterparty exposure across price and policy scenarios. Powered by InfraSure's asset cashflow stack.
See the full revenue + DSCR projection for this project.
- 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.
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Ask about SOLAR STAR 4Forward forecasts, scenario decomposition, and risk-decision tooling for this queue project.
