The Consumers Energy distributed generation program
Michigan has not had traditional one-for-one net metering since the Michigan Public Service Commission replaced it with a Distributed Generation program. DTE and Consumers each administer their own tariff under that framework, and in Grand Rapids yours is the Consumers program. It accepts systems up to 550 kW, sized to no more than 110 percent of your historical 12-month usage.
Excess generation is credited at the power supply rate including transmission. The word doing the work there is excess: the arrangement rewards power you consume as you generate it more highly than power you push onto the grid, because self-consumed generation avoids the whole retail rate while exported generation earns a narrower one. In practice that shifts the design question away from filling the roof and towards matching the household.
Ask your installer which Consumers tariff schedule your address falls under, and to model your production against your own consumption profile, hour by hour if they can, rather than as an annual total. An annual total hides the mismatch between a generation peak that arrives at midday and a household that uses most of its power after six.
What changed for Consumers customers in February 2024
As of 27 February 2024, credits earned by a Consumers distributed generation participant are applied against all electric charges on the bill. Before that date they applied only to the power supply portion, which meant a credit could offset one part of the bill while the rest carried on regardless.
That is a real improvement, and it is worth checking that any advice you are given reflects it. Guidance written before 2024, including older explainer articles and some installer material still in circulation, describes the narrower version and will understate what a credit is worth to you now.
The same act that reshaped the program, Michigan's 2023 Public Act 235, set the 550 kW project ceiling and the 110 percent customer sizing cap that Consumers applies today. So when you compare a Grand Rapids quote against one a neighbour got a few years ago, expect the rules behind them to differ, and ask the installer to confirm they are quoting the current program rather than the one they learned.
About 1,177 kWh a year for every kW installed
The planning estimate for Grand Rapids is roughly 1,177 kWh a year per kW of panels. It is derived from satellite irradiance data with a standard performance ratio applied, not measured on local roofs, so treat it as the figure that tells you whether to keep going, and not as a production guarantee.
Two houses on the same street can land well apart from that average. Roof orientation sets the shape of the day, tree cover sets how much of it you keep, and the usable area left after vents and setbacks caps the system size. Winter matters more than the annual number suggests in a city with real snow cover: a steeper pitch sheds snow faster, and a shallow one can sit under it for days.
A quote should show modelled output per roof plane and the assumptions behind it, including the shading analysis. If the model is one number for the whole house, you cannot tell whether the last few panels are earning their keep or simply inflating the total.
Roofs, duplexes and the buildings someone else owns
Of the 84,894 housing units in Grand Rapids, 56.2 percent are single-detached houses. That is the group with the straightforward path: you decide, you apply, you get inspected, and the credit lands on your own account.
Two-unit buildings are 9.8 percent of the stock here, and they raise a question worth settling early. An array connects to one electrical service, so it reduces one household's bill rather than both. If you own the building and rent the other half, that is a decision about which meter the system serves. If the two halves are separately owned, it is a conversation to have before a contract is signed rather than after.
Buildings of 20 or more apartments hold 14.1 percent of units, and buildings of 5 to 9 and 10 to 19 units hold a further 4.5 percent and 3.4 percent. In all of those the roof belongs to the building owner, so an individual resident cannot commission an installation, and an array on the building usually offsets a building account. If you rent, the realistic move is to ask the owner whether they have looked at it, rather than to get a quote yourself.
The money side of a 2026 project
Start by taking the federal credit out of every number you have been shown. The 30 percent residential credit under Section 25D applied through December 31, 2025 and does not apply to a purchased home system placed in service after that date. It is not a deadline you can still catch, so a 2026 Grand Rapids quote that includes it is describing the wrong year.
There is one nuance worth knowing. Where a homeowner takes a lease or a power purchase agreement rather than buying, the provider can still claim the business version of the credit under Section 48E and may reflect some of that in the rate it quotes. Ask the provider what they are claiming and how much of it reaches you, then take the answer to a tax advisor rather than to an online calculator.
For financing a purchase, Michigan Saves is the state's nonprofit green bank. It connects homeowners with participating credit unions offering below-market rates on qualifying energy work, solar and battery storage included, starting at 5.99 percent APR with terms up to 180 months. It requires an authorized contractor and an application through its own portal, which is a reason to check whether the installer you like is on the list before you get attached to their quote.