ZEUS BESS (CAISO-1920) — Project Summary

Queue ID
CAISO-1920
Capacity
213.55 MW
Technology
Battery
Status
active
Location
San Joaquin, CA
Region
CAISO
Developer
IA Status
IA Executed

ZEUS BESS

CAISO-1920BetaActiveBatteryCAISOLBNL + Live

213.55 MW storage in San Joaquin, CA · In queue since April 2021 · Proposed COD June 2031

BA: CISOISO/RTO: CAISONERC: WECCRC: RCW

213.55 MW

Capacity

1

Components

Battery

5y 3m

In Queue

IA Executed

IA Phase

Signed Dec 2024

Interconnection

Queue → IA

3y 8m

IA → COD

6y 6m

Total Duration

3y 8m

Study Phase

C14

Construction75%
Queue EntryApr 15, 2021

Interconnection request submitted to ISO/RTO

Cluster Study (Phase I/II)

CAISO uses cluster studies where projects are batched annually and studied together.

Typical: 36–48 months (IR to IA)

Interconnection AgreementDec 26, 2024

Interconnection agreement executed — binding commitment to build

Typical: 30–60 days (negotiation)

ConstructionCurrent

Project under construction

Typical: 6–18 months

Commercial Operation

Proposed COD: 2031-06-18

Cross-source intelligence
Beta
Medium confidence·4 sources·as of 2026-06-01
Expected COD
Jun 2031
From queue filing
Developer
Middle River Power
Filed as Zeus BESS LLC
Status
IA Executed
IA Executed — interconnection agreement signed December 2024, project remains in pre-construction phase with 2031 target
Financing
Unannounced
Key milestones
IA executedDec 26, 2024

Large Generator Interconnection Agreement executed with CAISO

source
COD targetJun 2031Most recent

Proposed commercial operation date June 2031

source
About

The ZEUS BESS project is a proposed 213.55 MW battery storage project located in San Joaquin County, California. The project is in the California Independent System Operator (CAISO) interconnection queue as entry CAISO-1920, with a queue entry date of April 15, 2021. The proposed commercial operation date is June 18, 2031. The interconnection agreement has been executed.

The project, which will interconnect to the PG&E utility grid at the Schulte 115 kV point of interconnection, is currently listed as active in the CAISO queue. The developer is unknown. The project has appeared in recent news coverage.

Generated from interconnection queue and public data sources

Development Risk

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.

Available on the InfraSure platform

See the full development-risk decomposition for this project.

P(COD by stated date)
Financing close probability
EPC + tax-equity counterparty
Project Details

State

CA

County

San Joaquin

Grid Region

CAISO (California)

Market

ISO/RTO Member

Developer

Utility

PGAE

Entity

CAISO

Service Type

NRIS

Point of Interconnection

Schulte 115 kV

Data Source

LBNL + Live

Risk Analytics

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.

Available on the InfraSure platform

See the full risk decomposition + scenarios for this project.

Climate hazards (8+)
Generation variability (P10/P50/P90)
Offtake + transmission counterparty
Generation Forecast

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.

Available on the InfraSure platform

See the full forecast + scenario decomposition for this project.

10-year P50 forecast
First-year output estimate
Weather + policy scenarios
Financial Forecast

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.

Available on the InfraSure platform

See the full revenue + DSCR projection for this project.

10-year revenue projection
First-year DSCR
Financing close risk
Market Context
Approximate
ISO / RTO
CAISO
Trading Hub
TH_NP15_GEN-APND
Hub Confidence
MEDIUM
Nearest Node (Estimated)
SCHLTE_1_PL1X3-APND
POI Substation
Schulte Switching Station

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 insights available for this project.

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InfraSure platform

Forward forecasts, scenario decomposition, and risk-decision tooling for this queue project.