Assembly Solar Project
Solar power plant · Shiawassee County, Michigan
Nameplate capacity
50 MW
Rank in Michigan
#90
of 289 plants
In service since
2020
December 2020
Details
- Primary fuel
- Solar
- Technology
- Solar Photovoltaic
- Operator
- Assembly Solar I, LLC
- County
- Shiawassee County
- Generating units
- 1
- Share of state capacity
- 0.14%
- Rank among solar plants in Michigan
- #18 of 76
- EIA plant code
- 62422
Generating units
| Unit | Technology | Nameplate | Summer | Online | Status |
|---|---|---|---|---|---|
| ASP01 | Solar Photovoltaic | 50 MW | 50 MW | 2020 | Operating |
Nameplate is the maximum rated output; summer capacity is what the unit can reliably deliver on a hot day, which is typically lower.
Similarly sized plants in Michigan
| George Johnson | Natural gas | 51 MW |
| Beebe 1B | Wind | 50 MW |
| Wyandotte | Natural gas | 49 MW |
| Alpena Cement Plant | Other | 47 MW |
About this data
From EIA’s inventory of operable generators, May 2026 release. Capacity is nameplate — the maximum rated output of the equipment, not what the plant actually generates over a year, which depends on how often it runs. A 50 MW solar plant and a 50 MW nuclear plant have the same entry here and produce very different amounts of electricity.
“In service since” is the earliest in-service date among the units still listed, so a site rebuilt around newer equipment can read as younger than the site itself. All Michigan power plants · What Michigan actually generates