Iron Horse Battery Storage Hybrid — Plant Summary
- EIA Plant ID
- 60996
- Capacity
- 12 MW
- Primary Fuel
- Battery Storage
- Technology
- Batteries, Solar Photovoltaic
- Status
- Operating
- Location
- Pima, AZ
- Operating Since
- 2017
- Generators
- 2
- Operator
- Big Sky Wind, LLC
- Parent Company
- —
- Annual Generation
- 4,650 MWh
- Capacity Factor
- 4.4%
- Balancing Authority
- Tucson Electric Power Company
- ISO/RTO
- —
- NERC Region
- WECC
Iron Horse Battery Storage Hybrid
OperatingBESSSolarHybrid
Ranked #53 of 55 BESS plants in AZ#502 of 837 nationally
12 MW Batteries (10 MW) + Solar Photovoltaic (2 MW) operating in Pima, AZ — Tucson Electric Power Company
EIAGEMWD
12 MW
Nameplate Capacity
2
Generators
units
Hybrid (2)
Technology
Batteries + Solar Photovoltaic
2017
Operating Since
Location
Coordinates
32.1033, -110.8220
County
Pima, AZ
Nearby Plants
- Gato Montes Solar, LLCSolar5 MW · 0.3 km
- FRB Solar FarmSolar1.9 MW · 0.5 km
- Tech Park SolarSolar5 MW · 0.6 km
Ownership & Operator
| Field | EIA | GEM | Wikidata |
|---|---|---|---|
| Operator | Big Sky Wind, LLC | RWE Renewables Americas | — |
| Owner(s) | Big Sky Wind, LLC | — | — |
| Status | Operating | operating | — |
Ownership Chain
No GEM tracker match for this plant — ownership chain unavailable.
About
The Iron Horse Battery Storage Hybrid is a 12 MW hybrid power plant located in Pima County, Arizona. The plant, which began operating in 2017, is owned and operated by Big Sky Wind, LLC. It utilizes both battery storage and solar photovoltaic technologies. The battery energy storage system (BESS) has a storage capacity of 2.5 MWh and a duration of 0.25 hours, employing lithium-ion battery chemistry (LIB). The solar array uses a fixed-tilt tracking system. The plant's balancing authority is Tucson Electric Power Company, and it operates within the Western Electricity Coordinating Council (WECC) NERC region.
In its latest year of operation, the Iron Horse Battery Storage Hybrid generated 4,650 MWh, resulting in a capacity factor of 4.4%. The plant ranks 66th out of 68 power plants in Arizona and 723rd out of 1205 nationally. Financial data indicates a power purchase agreement (PPA) price of $65.2 per MWh, as reported to FERC.
Generated from EIA, GEM, and public data sources
Engineering & Generators
Grid Context
NERC Region
WECC
Balancing Authority
Tucson Electric Power Company
Grid Voltage
13.8 kV
Regulatory Status
NR
Entity Type
Independent Power Producer
Sector
IPP Non-CHP
Generation
352 MWh
Net Discharge
4.7K MWh
Annual Net Energy
4.4%
Capacity Factor
Jan 2022 – Dec 2024
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 DataBeta
Source: FERC Electric Quarterly ReportsHIGH
$65.2/MWh
PPA Price
Big Sky Wind, LLC
Contract Seller
Per-Unit Cost Trends
Pricing & Market Data
This plant is outside organized wholesale electricity markets (ISOs/RTOs). Nodal pricing data is not available.
News & Articles (5)Beta
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Last updated 2026-03-26
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