65 MW BESS operating in Grady, OK — Southwest Power Pool
65 MW
Nameplate Capacity
1
Generators
unit
Batteries
Technology
2025
Operating Since
Coordinates
35.3053, -97.8912
County
Grady, OK
Nearby Plants
| Field | EIA | GEM | Wikidata |
|---|---|---|---|
| Operator | Minco II Energy Storage LLC | — | — |
| Owner(s) | Minco II Energy Storage LLC | — | — |
| Status | Operating | — | — |
Minco II Energy Storage is a 65 MW battery energy storage system located in Grady County, Oklahoma. The plant, which began operating in 2025, has a single generator utilizing battery technology and is owned and operated by Minco II Energy Storage LLC. The primary fuel type is listed as MWH, indicating that it draws power from the grid to charge its batteries.
The facility operates within the Southwest Power Pool (SPP) balancing authority and the Midwest Reliability Organization (MRO) NERC region. Minco II Energy Storage is ranked as the 3rd largest of 5 battery storage plants in Oklahoma and 570th out of 1205 nationally. The battery system has a duration of 1 hour.
Generated from EIA, GEM, and public data sources
NERC Region
MRO
Balancing Authority
Southwest Power Pool
Grid Voltage
345 kV
Regulatory Status
NR
Entity Type
Independent Power Producer
Sector
IPP Non-CHP
−1.6K MWh
Net Charging
-9.4K MWh
Annual Net Energy
-2.5%
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.
No financial data available for this plant.
Market Position
ISO/RTO Market
SPP
LMP Node
CSWS.HCPP.RBPW
Pricing Hub
SPP South Hub
Node Source
Curated node match
Last updated 2026-03-14
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