Solar vs HVAC in Michigan: which should you do first? Start with one question. Is the house using too much energy, or is it already efficient enough that making your own power is the better next step?
For most Michigan homes, fixing the load comes first. A better heating system and a tighter house cut how much electricity you need. Solar then has less to cover, so it can be smaller and cheaper. But there are real exceptions, and Michigan's 2026 rebates and solar rules shape the answer.
Solar vs. HVAC in Michigan: The Short Answer
HVAC first usually makes sense when:
- Your furnace, heat pump or AC is old, failing or needs frequent repairs
- You heat with electric resistance heat, like baseboards or an electric furnace
- You heat with propane and are thinking about a heat pump
- Your heat pump leans on backup heat, or rooms heat and cool unevenly
- Michigan Home Energy Rebates (MiHER) could pay for much of the project
Solar first may make sense when:
- Your HVAC is modern and efficient
- Insulation and air sealing are already good
- Your electricity use is steady and your roof gets good sun
- You plan to stay in the home for years
And sometimes efficiency beats both. If the attic is thin, the house is drafty or the ducts leak, insulation and air sealing may be the smartest first dollar.
What HVAC Solves, and What Solar Solves
HVAC changes how much energy the house needs. Michigan has cold winters and warm, humid summers, so heating and cooling create big seasonal loads. A better system can also fix comfort problems, like a freezing upstairs, poor airflow or humidity.
Solar changes where some of your electricity comes from. It can cut what you buy from DTE Energy (DTE) or Consumers Energy. But it can't fix a failing furnace, leaky ducts or weak insulation. If the house wastes energy, solar just helps pay for the waste.
Example: Why HVAC First Can Shrink Solar
Here's a hypothetical. A home uses 16,500 kWh (kilowatt-hours, the unit on your bill) a year. It has electric resistance heat, old cooling equipment, a thin attic and lots of air leaks. After HVAC and weatherization work, usage falls to 12,000 kWh a year.
That's 4,500 fewer kWh for solar to cover. The homeowner may need fewer panels, a smaller inverter and less financing. The efficiency project didn't compete with solar. It made the solar project better.
Fix the load first. Then decide how much electricity is worth generating.
When HVAC Should Come First
If your furnace, heat pump or AC is 15 to 20 years old, breaking down often or barely working, replace it first. Solar doesn't make that replacement go away. If money is tight, working heat in a Michigan winter comes before panels on the roof.
Two heating types deserve a close look. Electric resistance heat turns electricity directly into heat. A heat pump moves heat instead, so switching can cut your electric use a lot. Propane heat is a different story. Switching to a heat pump can cut or end your propane use, but your electric use will go up.
How Heat Pumps Change Solar Sizing
That's why the order matters. Michigan lets you size solar up to 110% of your prior 12 months of electricity use. If you replace resistance heat with a heat pump, your usage drops, so the right solar system gets smaller. If you replace propane with a heat pump, your usage rises, so you may need more solar than your old bills suggest.
Either way, design solar around the home you'll have after the HVAC work, not the home you have today. Because the limit looks back 12 months, a new heat pump's load may not show up in your history right away. Ask how your utility handles sizing when you plan to add new electric load.
Example: 110% of the Efficient Home
Here's another hypothetical. A home uses 18,000 kWh a year today, and inefficient electric heat drives much of it. At 110%, the limit is 19,800 kWh. After a heat pump upgrade, usage falls to 13,500 kWh, and 110% of that is 14,850 kWh.
A system built for the old 19,800-kWh limit could be far bigger than the home needs. Aim for 110% of the efficient home, not 110% of today's waste.
Why Extra Solar Is Worth Less in Michigan
Michigan's old net metering is closed. New solar customers get distributed generation (DG) billing, also called inflow/outflow. Inflow is power you buy from the utility. Outflow is extra solar you send to the grid. The outflow credit (what the utility pays for that extra solar) is lower than the retail price.
On DTE's standard plan, the outflow credit is 8.709¢/kWh off-peak and 14.407¢ at summer peak, plus the fuel charge. Base prices for power you buy on that plan are 18.44¢ off-peak and 24.13¢ at summer peak. Those base prices don't include the fuel charge, other surcharges, the monthly service charge or taxes. DTE's outflow credit also can't offset delivery charges or surcharges. Consumers Energy credits exports at its power-supply rate, including transmission, and those credits can apply to all electric charges.
Example: Use Your Solar at Home
Say your panels make 30 kWh on a sunny day. The house uses 20 kWh right away and sends 10 kWh to the grid. Those 20 kWh replace power you'd otherwise buy at the full price. The other 10 kWh earn the lower outflow credit. That's why oversizing solar to export lots of power usually isn't the best plan.
DTE Rebates for HVAC and Insulation
DTE offers up to $1,200 for a cold-climate heat pump, $150–$500 for a standard air-source heat pump and $700–$1,000 for a ductless mini-split. These heat pump and mini-split rebates only apply when you're replacing electric heat, so a propane switch won't qualify. Central AC rebates run $100 to $300, depending on efficiency. Funds are limited and first-come, first-served.
DTE also has a strong offer for electric-heated homes. The home must be single-family, built before 2016, and heated by an air-source heat pump or electric baseboard. If it qualifies, DTE covers 50% of an assessment, air sealing and insulation, up to $5,000, through a participating contractor. DTE's separate attic insulation rebate of up to $600 only applies if DTE is your main heating provider, which mostly means DTE gas customers.
Consumers Energy Rebates
Consumers Energy offers $300 for an air-source heat pump and $350 for a ductless mini-split. Central AC earns $150 or $300, depending on efficiency. A high-efficiency furnace earns $100 or $300. These rebates are smaller than MiHER, but they still lower your net cost.
Sometimes a Tune-Up Beats Replacement
If your system is fairly young and working, it may just need a proper diagnosis. DTE offers a $75 rebate for an AC diagnostic tune-up. Consumers Energy offers $65 tune-up rebates. Don't replace a system that only needed a tune-up.
MiHER: Two Programs, Two Separate Caps
For income-qualified households, MiHER can change the whole comparison. EGLE (the Michigan Department of Environment, Great Lakes, and Energy) runs two programs. HOMES pays up to $20,000 for whole-home projects that cut modeled energy use at least 20%. HEAR pays up to $14,000 for electric upgrades like heat pumps and wiring. HEAR is for households at or below 150% of area median income (AMI).
Below 80% of AMI, rebates may cover up to 100% of costs. Between 80% and 150%, they may cover up to 50%. These are two separate caps. You can use both programs only if you qualify for both, and never for the same upgrade.
MiHER Rules: Screen First, Install Second
MiHER is currently open to low- and moderate-income households only. As of fall 2026, new income-qualified applications are suspended in five EGLE districts: Detroit, Warren, Grand Rapids, Lansing and Kalamazoo. Work must be done by a MiHER Registered Contractor, and the rebate is paid to the contractor. Don't install first. HEAR rebates can't be applied after the fact.
A Real Michigan Example
In August 2026, EGLE shared the story of an Upper Peninsula homeowner. The homeowner received a $20,000 HOMES rebate for an assessment, a heat pump and a heat-pump water heater. They also received $6,500 from HEAR for panel and wiring work. That's why you check incentives before comparing an HVAC quote with a solar quote. The HVAC project may cost far less than its sticker price.
Compare Net Cost, Not Sticker Price
Here's a hypothetical. Your HVAC needs replacing anyway. A basic system costs $11,000, and a high-efficiency one costs $16,000. The real efficiency decision is the $5,000 difference, before any rebates you qualify for. Judge solar the same way: net cost, export value, self-use, financing and how long you'll stay.
The Federal Tax Credits Are Gone
Two federal credits have ended: 25D for home solar and 25C for efficiency upgrades like heat pumps. Neither is available for property placed in service after Dec. 31, 2025. A 2026 proposal shouldn't subtract 30% for either one. Michigan also has no statewide residential solar rebate. That makes state and utility rebates for efficiency and HVAC matter even more.
When Solar Can Come First
If your HVAC is modern, your home is tight and your usage is steady, there may be little cheap waste left. That's when solar can take on the power you still buy. Check the roof first, though. If it's near replacement, do the roof before solar, or you may pay later to remove and reinstall the panels.
Where Batteries Fit
A battery solves a different problem. If you already have solar and export a lot at midday, a battery can store some of that power for the evening. It can also keep key circuits, like a sump pump, running during an outage. That doesn't make it automatically worth the cost. Evaluate it after solar, on its own numbers.
Four Michigan Homes, Four Different First Moves
- Home A: Electric baseboard heat, old AC, poor insulation and strong MiHER eligibility. Best first move: MiHER, HVAC and weatherization, then resize solar.
- Home B: Working HVAC but big attic and air-leak problems. Best first move: insulation and air sealing.
- Home C: Modern HVAC, a tight home, steady high use and a good roof. Best next move may be solar.
- Home D: Existing solar, big midday exports and a need for backup. Best next move may be a battery.
A Simple Order for Michigan Homes
- Check MiHER and utility rebates and price HVAC after incentives.
- Replace HVAC first if it's old, failing or uses resistance heat.
- Fix insulation and air leaks if they're a major problem.
- Evaluate solar, sized for the efficient home.
- Evaluate a battery if you export heavily or need backup.
The Ashborn Approach
Before recommending anything, Ashborn Partners looks at your utility, your usage history and your heating fuel. We review HVAC age and efficiency, resistance heat, insulation and air leaks. Then we check MiHER eligibility, utility rebates, roof condition, solar sizing, battery needs and future plans like an EV. We connect you with participating providers who serve your area.
In Michigan, check the house and check MiHER before you check the roof.
Rebates, MiHER availability and solar credit rules can change. Solar cost and savings examples are hypothetical. The federal residential clean energy credit is not available for property placed in service after December 31, 2025.