Grant Solar, LLCPlanned
McCook County, South Dakota · EIA plant ID 69981 · Operator: Geronimo Energy
99 MW planned (Solar Photovoltaic), first expected Oct 2027 · EIA-860M
Nameplate—MWSummer — MW
Generators0in service
Net generation—GWh12 mo
Capacity factor—no 923 generation in the last 12 months
Heat rate—thermal plants only
First online—
Capacity factor by year
Net MWh ÷ (summer MW × hours), primary-fuel units. Each year uses that year's EIA-860 ratings; the hollow dot is the latest 12 months.
No capacity factor available.
Heat rate by year
Electric fuel MMBtu × 1000 ÷ net MWh (Btu/kWh, HHV), fossil units only; CT + CA counted as one combined-cycle block.
Heat rate applies to fuel-burning (thermal) units only.
Generators
EIA-860 (annual) with EIA-860M updates through Sep 2026. EIA-923 reports generation by plant, prime mover and fuel, not by unit, so unit-level output isn't shown.
| Gen ID | Technology | Prime mover | Nameplate MW | Summer MW | Online | Status | Planned retirement | OEM / model |
|---|---|---|---|---|---|---|---|---|
| GRNTS | Solar Photovoltaic | PV | 99 | 99 | planned Oct 2027 | Planned | — | coming soon |
Owner / operator
Operator: Geronimo Energy. Ownership shares by in-service nameplate MW (EIA-860 Schedule 4; units not listed there are wholly owned by the operator).
Nearby plants
Within 80 km.
| POET Biorefining - Chancellor | 5 MW | 31.9 km |
| Angus Anson | 406 MW | 51.2 km |
| Prevailing Wind Park | 220 MW | 60.6 km |
| Minwind 3-9 | retired | 71.2 km |
| Walleye Wind | 110 MW | 71.3 km |
| POET Bioprocessing- Mitchell | 4 MW | 72.7 km |