Saint Energy Storage II LLC — Plant Summary
- EIA Plant ID
- 66716
- Capacity
- 100 MW
- Primary Fuel
- Battery Storage
- Technology
- Batteries
- Status
- Operating
- Location
- Pinal, AZ
- Operating Since
- 2023
- Generators
- 1
- Operator
- Saint Energy Storage II LLC
- Parent Company
- —
- Annual Generation
- -16,651 MWh
- Capacity Factor
- -1.9%
- Balancing Authority
- Salt River Project
- ISO/RTO
- —
- NERC Region
- WECC
Saint Energy Storage II LLC
OperatingBESS
Ranked #39 of 55 BESS plants in AZ#315 of 837 nationally
100 MW BESS operating in Pinal, AZ — Salt River Project
EIA
100 MW
Nameplate Capacity
1
Generators
unit
Batteries
Technology
2023
Operating Since
Location
Coordinates
32.8695, -111.5142
County
Pinal, AZ
Nearby Plants
- Saint SolarSolar100 MW · 0.1 km
- Storey Solar and StorageBESS210 MW · 2.6 km
- Homer Solar Energy CenterSolar90 MW · 2.8 km
Ownership & Operator
| Field | EIA | GEM | Wikidata |
|---|---|---|---|
| Operator | Saint Energy Storage II LLC | — | — |
| Owner(s) | Saint Energy Storage II LLC | — | — |
| Status | Operating | — | — |
Ownership Chain
No GEM tracker match for this plant — ownership chain unavailable.
About
Saint Energy Storage II LLC is a 100 MW battery energy storage system (BESS) located in Pinal County, Arizona. The facility, owned and operated by Saint Energy Storage II LLC, began operating in 2023. It is interconnected to the Salt River Project balancing authority within the Western Electricity Coordinating Council (WECC) NERC region. The plant is fueled by MWH, indicating it draws power from the grid to charge its batteries.
The facility consists of a single generator utilizing lithium-ion battery (LIB) technology. The BESS has a total storage capacity of 400 MWh, providing a duration of 4 hours at its full 100 MW discharge rate. According to state rankings, Saint Energy Storage II LLC is the 47th largest power plant in Arizona out of 47 plants. Nationally, it ranks 511 out of 514.
Generated from EIA, GEM, and public data sources
Engineering & Generators
Grid Context
NERC Region
WECC
Balancing Authority
Salt River Project
Grid Voltage
230 kV
Regulatory Status
NR
Entity Type
Independent Power Producer
Sector
IPP Non-CHP
Interconnection Queue1 projectBeta
OperationalBattery100 MWWest
Generation
−1.6K MWh
Net Charging
-16.7K MWh
Annual Net Energy
-1.9%
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.
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Last updated 2026-03-14
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