DTE Energy sues Michigan county over solar regulations

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DTE Energy filed a lawsuit earlier this month against Michigan’s St. Clair County, the county’s board of commissioners and the county’s health department. The lawsuit alleges local officials overstepped their authority by restricting large-scale solar projects through zoning restrictions and health department approval.

The county’s regulations say solar installations are a health hazard due to noise and visual pollution.

Noise levels loud enough to be heard at property lines can typically be avoided by designing the project so that the inverters are furthest from the property.

(Read: Sounds from the sun: Addressing acoustics for solar harmony)

The county’s regulations say energy facilities have the potential to create visual pollution resulting in negative or dangerous health consequences. The regulations say visual pollution can “‘significantly contribute to stress levels in individuals’” and is also “linked to increased levels of anxiety and development of depressive symptoms.”

DTE Energy’s lawsuit alleges the county’s rules are illegal under Public Act 233, a new law that went into effect less than a year ago. PA 233 allows developers to petition the state when towns or counties try to prevent landowners from using their land for a renewable energy project despite its state compliance. The law grants the Michigan Public Service Commission with authority to grant permits if a local government fails to adopt a compatible renewable energy ordinance, fails to make a decision within 120 days of an application, or denies a permit for an application that meets state requirements.

The county’s new regulation impose stricter limitations of 45 decibels than PA 233’s allowance of 55 decibels. The county’s regulations also prohibit tonal noise.

DTE Energy argues the county’s regulations exceed the standards set forth by PA 233. The county adopted new regulations May 1, 2025 that require solar and battery storage facilities to obtain Health Department approval before construction.

Until shutting it down in 2022, DTE Energy owned a major coal- and oil-fired power plant in St. Clair County.

DTE Energy’s former oil- and gas-fired power plant in St. Clair County.

Local governments work to exert local control over private land

DTE Energy has taken steps in recent years to bring more renewable energy projects online in lieu of coal-fired plants. For example, the utility reached a settlement in 2023 to revise its resource plan and add 3.8 GW of renewables. In 2022, DTE announced a deal with Ford for a 650 MW power purchase agreement for a group of solar projects set to come online.

When DTE announced the deal, Michigan received just 0.64% of its electricity from solar, with 927 MW capacity installed, according to the Solar Energy Industries Association. DTE Energy said at the time that once complete, the projects would increase Michigan’s solar energy by 70%.  Michigan’s installed capacity has since grown to 1.88 GW of solar as of the end of 2024, and the SEIA projects a growth of 4.79 GW over the next five years.

Prior to Public Act 233, renewable energy developers faced an array of siting approval hurdles in Michigan, such as strategic zoning maneuvers, repressive ordinances, and jurisdictions refusing to review certain projects by enacting moratoriums while they developed ordinances to keep the renewable energy project out.

(Also read: Michigan House eyes repeal of state authority over clean energy siting)

The Sabin Center for Climate Change Law said at least seven townships had either prohibited or substantially restricted solar development in districts zoned for agricultural use as of the end of 2023, a considerable increase from just two townships reported the prior year.

In some cases, local governments have successfully thwarted clean energy projects without creative, or even straightforward, legal maneuvers. Instead, some cases have taken a more vitriol approach, such as in Ostego County, when backlash led developer RWE to bow out of a deal for land offered from the Michigan Department of Natural Resources.

Despite the strong local opposition and measures taken by local governments to restrict renewable energy development across Michigan, most Michiganders say they support the state taking measures to develop more clean energy projects.

Click to enlarge.

Michigan residents who said it is “not that important” or “not important at all” for Michigan to make it easy to get new clean energy projects approved for build are in the minority, with 8% of democrats and 32% of republicans saying it is not important, according to Data for Progress and Evergreen Action’s survey of 566 Michigan voters in January. Additionally, only a minority of Democrats (6%) and Republicans (35%) surveyed said they oppose Michigan taking steps to ensure the state generates at least 50% of its energy from clean and renewable sources by 2030.

Also read: Local opposition threatens clean energy transition

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