TEP-146
175 MW storage in Pima, AZ · In queue since December 2022 · Proposed COD December 2026
175 MW
Capacity
1
Components
Battery
3y 5m
In Queue
—
IA Status
COD target: 2026
Total Duration
4 years
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-146 is a proposed 175 MW battery storage project located in Pima County, Arizona. The project, under development by Tucson Electric Power Company (TEP), consists of a single 175 MW battery component. It is currently active in the Tucson Electric Power (TEP) interconnection queue with an entry date of December 19, 2022, and a proposed commercial operation date of December 1, 2026. The point of interconnection is the Spanish Trail 138kV Substation.
The project is located in the Western region of the United States. As of the current data, the project does not have an interconnection agreement (IA) in place and has appeared in recent news coverage.
Generated from interconnection queue and public data sources
State
AZ
County
Pima
Grid Region
Mountain West
Market
—
Developer
—
Utility
Tucson Electric Power Company
Entity
TEP
Service Type
—
Point of Interconnection
Spanish Trail 138kV 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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