Polaris Solar Park
Gratiot County, Michigan · EIA plant ID 67757 · Operator: DTE Electric Company
Nameplate100MWSummer 100 MW
Generators1in service
Net generation143GWh12 mo to Aug 2026
Capacity factor16%solar units, summer MW
Heat rate—thermal plants only
First online2025
The 12-month figures include preliminary EIA-923 months, which EIA revises. Final data runs through Dec 2025.
Monthly net generation
EIA-923, all units at the plant. Net of station use; storage can go negative.
FinalPreliminary
Capacity factor by year
Net MWh ÷ (summer MW × hours), solar units. Each year uses that year's EIA-860 ratings; the hollow dot is the latest 12 months.
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.
Annual data table
| Year | Net GWh | Capacity factor | Heat rate (Btu/kWh) |
|---|---|---|---|
| 2025 | 59 | 13.4% | — |
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 |
|---|---|---|---|---|---|---|---|---|
| PLRSP | Solar Photovoltaic | PV | 100 | 100 | Jul 2025 | Operating | — | coming soon |
Owner / operator
Operator: DTE Electric Company. Ownership shares by in-service nameplate MW (EIA-860 Schedule 4; units not listed there are wholly owned by the operator).
| DTE Electric Company | 100.0% | 100 MW |
Nearby plants
Within 80 km.
| Beebe 1B | 50 MW | 6 km |
| Beebe 1A | 82 MW | 6 km |
| Polaris Wind Park | 169 MW | 6.6 km |
| Heartland Farms | 200 MW | 8.5 km |
| Bingham Solar, LLC | 20 MW | 21.7 km |
| St Louis | 6 MW | 22.4 km |