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Canceled or postponed, according to EIA. Last listed as operating or planned in January 2026. EIA-860M · Sep 2026
150 MW BESS in Polk, GA
150 MW
Nameplate Capacity
1
Generators
unit
Batteries
Technology
—
Operating Since
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Coordinates
34.0452, -85.0438
County
Polk, GA
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| Field | EIA | GEM | Wikidata |
|---|---|---|---|
| Operator | Aragon Energy Storage LLC | — | — |
| Owner(s) | Aragon Energy Storage LLC | — | — |
| Status | Canceled or postponed | — | — |
Aragon Energy Storage is a 150 MW battery energy storage system located in Polk County, Georgia. The plant is owned and operated by Aragon Energy Storage LLC. It consists of a single generator utilizing batteries as its primary fuel source, designated by the code "MWH." The facility operates within the balancing authority of Southern Company Services, Inc. - Trans, and is situated within the SERC NERC region.
Aragon Energy Storage is ranked as the 5th largest energy storage facility in Georgia, out of a total of 5 such plants. Nationally, it holds a rank of 399 out of 514 energy storage facilities. Recent news indicates activity related to deals involving the plant.
Generated from EIA, GEM, and public data sources
Grid Region
Southeast
Market
SEEM Participant
NERC Region
SERC — SERC Reliability Corporation
Balancing Authority
Southern Company Services, Inc. - Trans (SOCO)
Grid Voltage
230.0 kV
Regulatory Status
NR — Non-Regulated
Entity Type
Independent Power Producer
Sector
IPP Non-CHP
No generation data available for this plant.
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2023
$1,361/kW
Est. Construction Cost
Total estimated cost: $204.2M
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This plant's balancing authority participates in the Southeast Energy Exchange Market (SEEM). SEEM is a bilateral exchange — no public nodal pricing.
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.
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