MT · Solar

Solar quotes in Butte, MT.

One real quote from a vetted local Butte installer, sized to your roof, your bill, and every federal + state rebate you qualify for.

One vetted local installer · no lead list

What you get

One vetted local Butte installer
Rebates checked for your exact address
No call-center spam, no lead list

8 kW
Average system size: $2.85/W
Average cost (USD): 13 yrs
Average payback: 35+
Local installers

Why solar in Butte

It is worth stating the Montana incentive position plainly, because it is thinner than most homeowners expect. The 30 percent federal residential credit expired for property placed in service after December 31, 2025, and Montana previous alternative energy systems credit is no longer available for recent tax years. What Montana has instead is intact net metering and no solar-specific demand charge, which in 2026 is worth more than it sounds.

What is gone at tax level

The 30 percent federal Residential Clean Energy Credit under Section 25D expired for property placed in service after December 31, 2025. A cash or loan purchase now receives no federal tax credit.

Montana previously offered an alternative energy systems credit for residential installations. It is no longer available for recent tax years, so confirm the current position with the Montana Department of Revenue before letting a quote include one.

Section 48E, the commercial credit, survives at 30 percent for third-party owners under leases and power purchase agreements. The provider claims it, and whether any value reaches you depends on the rate offered.

So for a cash purchase the tax column is effectively empty, which is the same position as in most of the states covered on this site.

What Montana has that many states no longer do

Intact net metering. NorthWestern Energy proposed ending it and adding a demand charge, and the Public Service Commission unanimously rejected that proposal.

No solar-specific monthly charge. Alabama customers pay $5.41 per kW of installed capacity per month, close to $470 a year on a typical system, upheld in federal court in March 2026. Montana customers pay nothing equivalent.

A generous eligibility ceiling at under 50 kW, far above household need, so the programme does not constrain a residential design.

Those three things are worth real money and none of them appears as a line item, which is exactly why they get overlooked when people compare states.

Where the diligence belongs now

On the production estimate, since with an empty tax column the return is production multiplied by value and nothing else absorbs an overstatement.

Ask for the annual figure in kilowatt hours per year with the data source named, location-specific irradiance for your address, a stated snow allowance, terrain-aware shading and annual degradation.

On the value side, ask which retail rate the projection used, check it against a recent bill, and confirm fixed monthly charges were included.

And on the sizing, since credit remaining at the annual settle-up is granted to the utility without compensation. Ask for the credit balance tracked to the settle-up month.

What survives, and what to ask for

Strike the federal residential credit from any quote showing it, and confirm the state position with the Montana Department of Revenue rather than accepting a state credit line.

Rebuild from net metering under the NorthWestern arrangement, with credits accumulating across the year and unused credit forfeited at the annual settle-up.

Add the electricity you stop buying at your actual rate, with fixed charges included.

Ask for that version in writing with each line named, and with no solar-specific charge appearing in it, because none applies.

Incentives & rebates

Net metering: Net metering retained, with an annual settle-up forfeit

Montana retains net metering, and that is worth stating plainly because it was contested. NorthWestern Energy proposed ending net metering, creating a separate rate class for solar customers and adding a demand charge, and the Montana Public Service Commission unanimously rejected the proposal. The result is that Montana solar customers are not carrying the kind of solar-specific monthly charge that Alabama Power levies at $5.41 per kW per month, and the arrangement remains a genuine offset rather than a discounted export rate. Renewable installations of less than 50 kW capacity are eligible on the NorthWestern system, which is far above what a household would install, so the programme ceiling is not the practical constraint. What is, is the annual settle-up. At the settle-up month, any remaining unused kilowatt hour credit accumulated during the previous twelve months is granted to NorthWestern Energy without compensation to the customer. Nothing is paid for it and nothing carries forward into the following year. That puts Montana in the same structural position as Washington, Oregon and Kansas: credits accumulate usefully through the year, letting a summer surplus offset a winter deficit, but a genuine annual surplus is donated. The design conclusion follows directly. Build from your last twelve months of bills, ask what percentage of your annual usage the system covers, and ask for the monthly credit balance tracked through to the settle-up month. A balance that rises and falls with the seasons and lands near zero describes a well-matched system; one that only climbs describes an oversized one.

Related Montana resources

Montana solar incentives & rebates Full breakdown of federal, provincial, and utility programs.

How payback works in Montana

System cost: $22,800
Estimated net cost: $22,800
Estimated payback: ~14.1 years
25-year net savings: ~$17,700

These figures are illustrative; your actual quote reflects your roof, sun exposure, and local utility rates.

Frequently asked questions

Are there any Montana solar tax credits?

The federal Section 25D credit expired for property placed in service after December 31, 2025, and Montana previous alternative energy systems credit is no longer available for recent tax years. Confirm the current state position with the Montana Department of Revenue.

So what does Montana still offer?

Intact net metering after the Public Service Commission unanimously rejected NorthWestern Energy bid to end it, no solar-specific monthly charge, and a generous eligibility ceiling at under 50 kW. None of those appear as line items, which is why they get overlooked.

How much is the absence of a solar charge worth?

A great deal over a system life. Alabama customers pay $5.41 per kW of installed capacity per month, close to $470 a year on a typical system. Montana customers pay nothing equivalent.

Where should I focus my diligence?

On the production estimate, the retail rate assumption and the sizing, since with an empty tax column nothing absorbs an overstatement and unused credit is forfeited at the annual settle-up.