Roadrunner Reserve Phase 1 — Plant Summary
- EIA Plant ID
- 67905
- Capacity
- 200 MW
- Primary Fuel
- Battery Storage
- Technology
- Batteries
- Status
- Operating
- Location
- Pima, AZ
- Operating Since
- 2025
- Generators
- 1
- Operator
- Tucson Electric Power Co
- Parent Company
- Fortis
- Annual Generation
- -20,803 MWh
- Capacity Factor
- -2.4%
- Balancing Authority
- Tucson Electric Power Company
- ISO/RTO
- —
- NERC Region
- WECC
Roadrunner Reserve Phase 1
OperatingBESS
Ranked #30 of 55 BESS plants in AZ#187 of 837 nationally
200 MW BESS operating in Pima, AZ — Tucson Electric Power Company
EIA
200 MW
Nameplate Capacity
1
Generators
unit
Batteries
Technology
2025
Operating Since
Location
Coordinates
32.0718, -110.8162
County
Pima, AZ
Nearby Plants
- UASTP ISolar1.2 MW · 3.1 km
- Tech Park SolarSolar5 MW · 3.3 km
- Cogenra - TEPSolar1 MW · 3.4 km
Ownership & Operator
| Field | EIA | GEM | Wikidata |
|---|---|---|---|
| Operator | Tucson Electric Power Co | Tucson Electric Power | — |
| Owner(s) | Tucson Electric Power Co | Fortis | — |
| Status | Operating | — | — |
Ownership Chain
About
Roadrunner Reserve Phase 1 is a 200 MW battery energy storage system (BESS) located in Pima County, Arizona. The plant, identified by plant ID 67905, began operating in 2025. It consists of a single generator utilizing battery technology with a duration of 4 hours. Tucson Electric Power Company operates the facility, while the parent company is Fortis, a Canadian firm.
The plant's primary fuel source is electricity (MWH). Roadrunner Reserve Phase 1 operates within the Tucson Electric Power Company balancing authority and the Western Electricity Coordinating Council (WECC) NERC region. It is ranked as the 35th largest power plant in Arizona out of 47, and nationally it is ranked 322 out of 514.
Generated from EIA, GEM, and public data sources
Engineering & Generators
Grid Context
NERC Region
WECC
Balancing Authority
Tucson Electric Power Company
Grid Voltage
138 kV
Regulatory Status
RE
Entity Type
Investor-Owned Utility
Sector
Electric Utility
Interconnection Queue3 projectsBeta
ActiveBattery200 MWWestLBNL
Generation
−4.2K MWh
Net Charging
-20.8K MWh
Annual Net Energy
-2.4%
Capacity Factor
Positive values indicate net discharge (generation exceeds station load). Negative values indicate net charging. Pure battery storage plants are typically net negative due to round-trip efficiency losses.
Financial Data
No financial data available for this plant.
Pricing & Market Data
This plant is outside organized wholesale electricity markets (ISOs/RTOs). Nodal pricing data is not available.
News & Articles (8)Beta
General
Tucson Electric Power to build another big battery system to meet peak power demand
Tucson Electric Power plans to build a second, large battery system in southeast Tucson to store solar and other energy until later in the day to meet peak...
Arizona Daily Star·1 years ago
General
Roadrunner Reserve energy storage system to be one of largest in Arizona
Canadian Solar's e-Storage has entered the supply and integration contract for 1 GWh DC of energy storage solutions for DEPCOM Power and...
pv magazine USA·2 years ago
General
Roadrunner Reserve energy storage system to be one of largest in Arizona
Canadian Solar's e-Storage has entered the supply and integration contract for 1 GWh DC of energy storage solutions for DEPCOM Power and...
pv magazine USA·2 years ago
General
Arizona utility TEP building 200MW BESS to aid 'ambitious but responsible' renewable energy expansion
Tucson Electric Power (TEP), a utility company in the US state of Arizona, plans to own and operate a 200MW/800MWh battery storage system.
Energy-Storage.News·2 years ago
Last updated 2026-03-26
View all 8 articles