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100 MW Solar operating in Gratiot, MI — Midcontinent Independent Transmission System Operator, Inc..
100 MW
Nameplate Capacity
1
Generators
unit
Solar Photovoltaic
Technology
2025
Operating Since
Coordinates
43.2075, -84.5291
County
Gratiot, MI
Nearby Plants
| Field | EIA | GEM | Wikidata |
|---|---|---|---|
| Operator | DTE Electric Company | DTE Electric Company | — |
| Owner(s) | DTE Electric Company | DTE Energy | — |
| Status | Operating | operating | — |
Polaris Solar Park is a 100 MW solar photovoltaic power plant located in Gratiot County, Michigan. The plant, which began operating in 2025, is owned by DTE Energy and operated by DTE Electric Company. It consists of a single generator utilizing fixed-tilt solar tracking technology. Polaris Solar Park ranks as the 21st largest solar facility in Michigan and 615th nationally.
The plant operates within the Midcontinent Independent Transmission System Operator (MISO) balancing authority, in the ReliabilityFirst Corporation (RFC) NERC region. In its latest year of operation, Polaris Solar Park generated 58,951 MWh of electricity, achieving a capacity factor of 13.3%.
Generated from EIA, GEM, and public data sources
ISO/RTO
MISO
Market
ISO/RTO Member
NERC Region
RFC
Balancing Authority
5.7K MWh
Latest Month
59.0K MWh
Annual Generation
13.3%
Capacity Factor
2023
$1,606/kW
Est. Construction Cost
Total estimated cost: $160.6M
Point of Interconnection
Nearest Substation
Slate Substation · 345 kV
Substation Distance
0.23 km
Operator
ITC
Coord Source
OSM spatial
Market Position
ISO/RTO Market
MISO
LMP Node
CONS.POLRS.SOL
Pricing Hub
MICHIGAN.HUB
Location Type
Generation Node
Node Source
Curated node match
Last updated 2026-03-26
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ask pi about Polaris Solar ParkMidcontinent Independent Transmission System Operator, Inc.. (MISO)
Grid Voltage
345.0 kV
Regulatory Status
RE — Regulated
Entity Type
Investor-Owned Utility
Sector
Electric Utility