SIENNA SOLAR 2
112 MW hybrid in San Bernardino, CA · In queue since April 2021 · Proposed COD March 2029
112 MW
Capacity
2
Components
Solar + Battery
5y 3m
In Queue
In Progress (unknown study)
IA Phase
Signed Nov 2024
Queue → IA
3y 7m
IA → COD
4y 4m
Total Duration
3y 7m
Study Phase
C14
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: 2029-03-26
Interconnection Agreement status updated to 'In Progress' per LBNL snapshot
sourceThe proposed SIENNA SOLAR 2 project is a hybrid solar and battery energy storage development with a total capacity of 112 MW, located in San Bernardino County, California. The project consists of 56 MW of solar photovoltaic generation and a 56 MW battery energy storage system. It is interconnected to Southern California Edison (SCE) via the Calcite Substation 230 kV.
The project is listed in the CAISO interconnection queue under queue ID CAISO-2097, with an initial queue entry date of April 15, 2021. The proposed commercial operation date is March 26, 2029. The interconnection agreement (IA) status is currently listed as "In Progress (unknown study)".
Generated from interconnection queue and public data sources
Realization risk before commercial operation — cluster-study clearance, IA timing, counterparty mix, and withdrawal probability vs cohort. The diligence view that determines whether this project is worth pursuing. Powered by InfraSure's development-stage modeling stack.
See the full development-risk decomposition for this project.
State
CA
County
San Bernardino
Grid Region
CAISO (California)
Market
ISO/RTO Member
Developer
—
Utility
SCE
Entity
CAISO
Service Type
NRIS
Point of Interconnection
Calcite Substation 230 kV
Data Source
LBNL + Live
Composite operating-phase risk view — what this asset's risk profile would look like once it reaches commercial operation. 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 — what this project would produce assuming it reaches commercial operation. Probabilistic ranges (P10/P50/P90) across weather, demand, and policy scenarios, conditioned on the proposed COD. 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. The bankability view that determines whether the deal clears its covenants once online. Powered by InfraSure's asset cashflow stack.
See the full revenue + DSCR projection for this project.
- 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.
No Ask reports yet for this entity.
Ask about SIENNA SOLAR 2Forward forecasts, scenario decomposition, and risk-decision tooling for this queue project.
