Heartwood Solar
Hillsdale County, Michigan · EIA plant ID 67677 · Operator: Heartwood Solar, LLC
Nameplate150MWSummer 150 MW
Generators1in service
Net generation26GWh12 mo to Aug 2026
Capacity factor5%solar units, summer MW
Heat rate—thermal plants only
First online2026
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.
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 |
|---|---|---|---|---|---|---|---|---|
| HWS | Solar Photovoltaic | PV | 150 | 150 | Apr 2026 | Operating | — | coming soon |
Owner / operator
Operator: Heartwood Solar, LLC. Ownership shares by in-service nameplate MW (EIA-860 Schedule 4; units not listed there are wholly owned by the operator).
| Heartwood Solar, LLC | 100.0% | 150 MW |
Nearby plants
Within 80 km.
| Bullhead Solar, LLC | 2 MW | 5.8 km |
| Hillsdale | 12 MW | 9 km |
| Tibbits Energy Storage | 105 MW | 20.4 km |
| Crescent Wind Park | 150 MW | 21.3 km |
| DG AMP Solar Coldwater | 1 MW | 21.8 km |
| Cold Creek Solar Park | 100 MW | 22.2 km |