Mountain Valley Storage
306 MW storage in Stanislaus, CA · In queue since April 2023 · Proposed COD December 2029
306 MW
Capacity
1
Components
Battery
3y 1m
In Queue
Not Started
IA Status
COD target: 2029
Total Duration
6y 8m
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 not yet executed
Typical: 30–60 days (negotiation)
Proposed COD: 2029-12-31
Mountain Valley Storage is a proposed 306 MW battery storage project located in Stanislaus County, California. The project is in the California Independent System Operator (CAISO) interconnection queue as entry CAISO-54622, with a queue entry date of April 17, 2023. The proposed commercial operation date is December 31, 2029, and the interconnection agreement (IA) status is "Not Started."
The project, which is interconnected with Pacific Gas and Electric (PGAE), has been the subject of recent news coverage, including reports in industry publications and articles about business deals.
Generated from interconnection queue and public data sources
State
CA
County
Stanislaus
Grid Region
CAISO (California)
Market
ISO/RTO Member
Developer
—
Utility
PGAE
Entity
CAISO
Service Type
—
Point of Interconnection
QUINTO SW STA-FINK SW STA
Data Source
LBNL
- 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.
Last updated 2026-03-26
View all articlesNo ask pi reports yet for this entity.
ask pi about Mountain Valley Storage
