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200 MW BESS under construction in Pima, AZ
200 MW
Nameplate Capacity
1
Generators
unit
Batteries
Technology
—
Operating Since
Coordinates
32.0730, -100.8210
County
Pima, AZ
Nearby Plants
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| Field | EIA | GEM | Wikidata |
|---|---|---|---|
| Operator | Tucson Electric Power Co | Tucson Electric Power | — |
| Owner(s) | Tucson Electric Power Co | Fortis | — |
| Status | Under construction | — | — |
Roadrunner Reserve Phase 2 is a 200 MW battery energy storage system located in Arizona. The plant, identified by plant ID 68937, is owned by Fortis, a Canadian company, and operated by Tucson Electric Power Co. It consists of a single generator utilizing batteries as its primary fuel source. The plant ranks 34th out of 47 power plants in Arizona and 271st out of 514 nationally.
The facility operates within the Western Electricity Coordinating Council (WECC) NERC region and is under the balancing authority of Tucson Electric Power Company. The plant's primary fuel is electricity (MWH) used to charge the batteries.
Generated from EIA, GEM, and public data sources
Grid Region
Mountain West
Market
WEIM Participant
NERC Region
WECC — Western Electricity Coordinating Council
Balancing Authority
Tucson Electric Power Company (TEPC)
Grid Voltage
138.0 kV
Regulatory Status
RE — Regulated
Entity Type
Investor-Owned Utility
Sector
Electric Utility
No generation data available for this plant.
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2023
$1,361/kW
Est. Construction Cost
Total estimated cost: $272.2M
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This plant's balancing authority participates in CAISO's Western Energy Imbalance Market (WEIM). Direct nodal pricing data is not yet available.
No wholesale contracts disclosed in FERC EQR for this plant.
FERC EQR captures bilateral wholesale energy + capacity contracts ≥$1M/yr filed quarterly by jurisdictional sellers — covers renewable PPAs, thermal energy sales agreements, capacity contracts, and tolling agreements alike. Many plants don't appear: regulated-utility output flows to ratepayers via cost-of-service rather than bilateral contracts; small projects fall below the filing threshold; tax-equity-financed renewables route offtake to investors not utilities; merchant plants sell into ISO clearing markets without bilateral contracts. News-extracted buyer facts (below) may surface contracts disclosed only through announcements.
Last updated 2026-04-19
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