Assembly Solar Project
Shiawassee County, Michigan · EIA plant ID 62422 · Operator: Assembly Solar, LLC
Nameplate50MWSummer 50 MW
Generators1in service
Net generation101GWh12 mo to Aug 2026
Capacity factor23%solar units, summer MW
Heat rate—thermal plants only
First online2020
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) |
|---|---|---|---|
| 2020 | 1.6 | 4.3% | — |
| 2021 | 101.8 | 23.2% | — |
| 2022 | 101.5 | 23.2% | — |
| 2023 | 100 | 22.8% | — |
| 2024 | 102.3 | 23.3% | — |
| 2025 | 99.8 | 22.8% | — |
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 |
|---|---|---|---|---|---|---|---|---|
| ASP01 | Solar Photovoltaic | PV | 50 | 50 | Dec 2020 | Operating | — | coming soon |
Owner / operator
Operator: Assembly Solar, LLC. Ownership shares by in-service nameplate MW (EIA-860 Schedule 4; units not listed there are wholly owned by the operator).
| Assembly Solar, LLC | 100.0% | 50 MW |
Nearby plants
Within 80 km.
| Assembly Solar III | 79 MW | 0.2 km |
| Assembly Solar II LLC | 110 MW | 2.6 km |
| Venice Resources Gas Recovery | 2 MW | 4.9 km |
| Lennon Generating | 6 MW | 5.3 km |
| Coldwater Solar, LLC | 2 MW | 15.8 km |
| Captain Solar, LLC | 2 MW | 15.9 km |