Optimist

Solar power plant · Clay County, Mississippi

Nameplate capacity
250 MW
Rank in Mississippi
#21
of 64 plants
In service since
2026
January 2026

Details

Primary fuel
Solar
Technology
Solar Photovoltaic
Operator
Origis Energy USA, Inc
County
Clay County
Generating units
2
Share of state capacity
1.38%
Rank among solar plants in Mississippi
#2 of 25
EIA plant code
68536

Generating units

Individual generating units at Optimist
UnitTechnologyNameplateSummerOnlineStatus
OEMS7Solar Photovoltaic200 MW200 MW2026Operating
MS7_SBatteries50 MW50 MW2026Operating

Nameplate is the maximum rated output; summer capacity is what the unit can reliably deliver on a hot day, which is typically lower.

Similarly sized plants in Mississippi

Silver CreekNatural gas251 MW
Golden TriangleSolar250 MW
Golden Triangle IISolar200 MW
Delta Wind Farm (MS)Wind185 MW

About this data

From EIA’s inventory of operable generators, May 2026 release. Capacity is nameplate — the maximum rated output of the equipment, not what the plant actually generates over a year, which depends on how often it runs. A 250 MW solar plant and a 250 MW nuclear plant have the same entry here and produce very different amounts of electricity.

“In service since” is the earliest in-service date among the units still listed, so a site rebuilt around newer equipment can read as younger than the site itself. All Mississippi power plants · What Mississippi actually generates