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10 MW BESS operating in Pima, AZ
10 MW
Nameplate Capacity
1
Generators
unit
Batteries
Technology
2017
Operating Since
Coordinates
32.2515, -110.9914
County
Pima, AZ
Nearby Plants
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| Field | EIA | GEM | Wikidata |
|---|---|---|---|
| Operator | Pima Energy Storage System | — | — |
| Owner(s) | Pima Energy Storage System | — | — |
| Status | Operating | — | — |
The Pima Energy Storage System is a 10 MW battery energy storage system (BESS) located in Pima County, Arizona. The facility began operating in 2017 and utilizes lithium-ion battery chemistry (LIB). It consists of a single generator and has a total storage capacity of 10 MWh, providing a duration of 1 hour at full output. The plant's primary fuel is listed as 'MWH', indicating it draws power from the grid to charge its batteries.
Pima Energy Storage System is owned and operated by Pima Energy Storage System. The facility is located within the Western Electricity Coordinating Council (WECC) NERC region and is under the balancing authority of Tucson Electric Power Company. According to state rankings, the plant is the 67th largest out of 68 power plants in Arizona. Nationally, it ranks as the 785th largest out of 1205 power plants.
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
13.8 kV
Regulatory Status
NR — Non-Regulated
Entity Type
Independent Power Producer
Sector
IPP Non-CHP
Monthly net generation as reported to EIA-923 — useful for historical context. Confidence varies sharply by fuel type; the band above and the “About this data” button explain the caveats specific to this plant and how InfraSure’s in-house model handles them.
−46 MWh
Net Charging
-584 MWh
Annual Net Energy
-0.7%
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.
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2017
$1,587/kW
Est. Construction Cost
Total estimated cost: $15.9M
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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.
1 buyer • 28 active contracts
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