Assembly Solar III
Shiawassee County, Michigan · EIA plant ID 64196 · Operator: Assembly Solar III, LLC
Nameplate79MWSummer 79 MW
Generators1in service
Net generation165GWh12 mo to Aug 2026
Capacity factor24%solar units, summer MW
Heat rate—thermal plants only
First online2022
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) |
|---|---|---|---|
| 2022 | 151.9 | 21.9% | — |
| 2023 | 152.7 | 22.1% | — |
| 2024 | 160.4 | 23.1% | — |
| 2025 | 165 | 23.8% | — |
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 |
|---|---|---|---|---|---|---|---|---|
| AS3 | Solar Photovoltaic | PV | 79 | 79 | Jan 2022 | Operating | — | coming soon |
Owner / operator
Operator: Assembly Solar III, LLC. Ownership shares by in-service nameplate MW (EIA-860 Schedule 4; units not listed there are wholly owned by the operator).
| Assembly Solar III, LLC | 100.0% | 79 MW |
Nearby plants
Within 80 km.
| Assembly Solar Project | 50 MW | 0.2 km |
| Assembly Solar II LLC | 110 MW | 2.7 km |
| Venice Resources Gas Recovery | 2 MW | 5 km |
| Lennon Generating | 6 MW | 5.5 km |
| Coldwater Solar, LLC | 2 MW | 15.6 km |
| Captain Solar, LLC | 2 MW | 15.7 km |