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250 MW Batteries (50 MW) + Solar Photovoltaic (200 MW) operating in Clay, MS — Tennessee Valley Authority
250 MW
Nameplate Capacity
2
Generators
units
Hybrid (2)
Technology
Batteries + Solar Photovoltaic
2026
Operating Since
Coordinates
33.6435, -88.5940
County
Clay, MS
Nearby Plants
| Field | EIA | GEM | Wikidata |
|---|---|---|---|
| Operator | Origis Energy USA, Inc | Origis Energy | — |
| Owner(s) | Origis Energy USA, Inc | Origis Energy | — |
| Status | Operating | pre-construction | — |
GEM identifies the owner as Origis Energy
This entity is not yet in the GEM ownership database — chain unavailable.
The Optimist power plant, located in Clay County, Mississippi, is a hybrid solar and battery energy storage facility with a total capacity of 250 MW. The plant is operated by Origis Energy USA, Inc. and utilizes both solar photovoltaic technology and battery storage. The primary fuel type is listed as MWH, reflecting the energy storage component. The solar component uses a fixed tilt tracking system.
The Optimist plant is interconnected to the Tennessee Valley Authority (TVA) balancing authority and operates within the SERC NERC region. It is ranked as the largest of three hybrid plants in Mississippi and 207th out of 514 such plants nationally. The plant consists of two generators.
Generated from EIA, GEM, and public data sources
Grid Region
Southeast
Market
SEEM Participant
NERC Region
SERC — SERC Reliability Corporation
Balancing Authority
No generation data available for this plant.
2023
$1,361/kW
Est. Construction Cost
Total estimated cost: $340.3M
This plant's balancing authority participates in the Southeast Energy Exchange Market (SEEM). SEEM is a bilateral exchange — no public nodal pricing.
Last updated 2026-03-14
View all articlesTennessee Valley Authority (TVA)
Grid Voltage
161.0 kV
Regulatory Status
NR — Non-Regulated
Entity Type
Independent Power Producer
Sector
IPP Non-CHP