ALTA CASA STORAGE
515.418 MW storage in San Joaquin, CA · In queue since April 2021 · Proposed COD October 2031
515.418 MW
Capacity
1
Components
Battery
5y 1m
In Queue
IA Executed
IA Status
COD target: 2031
Total Duration
10y 6m
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: 6–18 months
Proposed COD: 2031-10-21
The Alta Casa Storage project is a proposed 515.42 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-1922, with a queue entry date of April 15, 2021, and a proposed commercial operation date of October 21, 2031. The project's interconnection agreement (IA) has been executed.
The project, which is being developed within the Pacific Gas and Electric (PGAE) service area, has been the subject of recent news coverage related to regulatory matters. The point of interconnection is the Tesla 500 kV substation.
Generated from interconnection queue and public data sources
State
CA
County
San Joaquin
Grid Region
CAISO (California)
Market
ISO/RTO Member
Developer
—
Utility
PGAE
Entity
CAISO
Service Type
—
Point of Interconnection
Tesla 500 kV
Data Source
LBNL + Live
- ISO / RTO
- CAISO
- Trading Hub
- TH_NP15_GEN-APND
- Hub Confidence
- MEDIUM
- Nearest Node (Estimated)
- TESLA_1_B1
- POI Substation
- Tesla 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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