SANBORN HYBRID 4
100 MW hybrid in Kern, CA · In queue since April 2020 · Proposed COD October 2025
100 MW
Capacity
2
Components
Solar + Battery
6y 3m
In Queue
IA Executed
IA Phase
Signed Dec 2024
Queue → IA
4y 8m
IA → COD
10 months
Total Duration
4y 8m
Schedule
9 months past proposed COD
Study Phase
C13
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: 2025-10-01
Terra-Gen closed $1 billion financing for phase 2, expanding Edwards Sanborn to 3291MWh battery capacity
sourceEdwards & Sanborn complex including SANBORN HYBRID 4 achieved full commercial operation as largest US solar-plus-storage project
sourceInterconnection Agreement executed per CAISO queue (likely administrative finalization post-COD)
sourceThe SANBORN HYBRID 4 project is a proposed 100 MW hybrid solar and battery energy storage project located in Kern County, California. The development project consists of 50 MW of solar photovoltaic generation and a 50 MW battery energy storage system. The project is interconnected to the CAISO grid at the Windhub Substation 230kV and is in the CAISO interconnection queue as queue ID CAISO-1790, with an entry date of April 15, 2020. The proposed commercial operation date is October 1, 2025, and the Interconnection Agreement has been executed.
The SANBORN HYBRID 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
ERIS
Point of Interconnection
Windhub 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)
- ALTA6B2_7_N003
- POI Substation
- Windhub 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 SANBORN HYBRID 4Forward forecasts, scenario decomposition, and risk-decision tooling for this queue project.
