TEP-121
200 MW storage in Pinal, AZ · In queue since May 2022 · Proposed COD December 2026
200 MW
Capacity
1
Components
Battery
4 years
In Queue
—
IA Status
COD target: 2026
Total Duration
4y 7m
Interconnection request submitted to ISO/RTO
Project undergoes interconnection studies to assess grid impact.
Typical: 18–36 months
Interconnection agreement not yet executed
Typical: 30–60 days (negotiation)
Proposed COD: 2026-12-01
TEP-121 is a proposed 200 MW battery storage project located in Pinal County, Arizona. The project is being developed by Tucson Electric Power Company (TEP). It consists of a single 200 MW battery component.
The project is currently active in the California Independent System Operator (CAISO) interconnection queue, having entered the queue on May 20, 2022. Its proposed commercial operation date is December 1, 2026. The point of interconnection is the Pinal West 345kV Substation.
Generated from interconnection queue and public data sources
State
AZ
County
Pinal
Grid Region
Mountain West
Market
—
Developer
—
Utility
Tucson Electric Power Company
Entity
TEP
Service Type
—
Point of Interconnection
Pinal West 345kV Substation
Data Source
LBNL
- ISO / RTO
- MOUNTAIN_WEST
- Trading Hub
- PALOVERDE
- Hub Confidence
- UNKNOWN
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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