MT · Solar

Solar quotes in Missoula, MT.

One real quote from a vetted local Missoula 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 Missoula 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 Missoula

Montana solar customers are not paying a solar-specific demand charge, and that is the direct result of a regulatory decision rather than an accident. NorthWestern Energy proposed ending net metering, creating a separate rate class for solar customers and adding a demand charge. The Montana Public Service Commission unanimously rejected that proposal. Understanding what was at stake explains a good deal about why Montana solar economics still work.

What NorthWestern proposed

The proposal had three parts: ending net metering, creating a separate rate class specifically for customers with solar, and adding a demand charge.

A separate rate class matters because it allows a utility to charge solar customers differently from other residential customers, which is the mechanism behind the charges levied in several other states.

A demand charge bills on your highest instantaneous draw rather than on total consumption, which is a structure households are poorly placed to manage and which can be substantial.

The Montana Public Service Commission voted unanimously to reject the proposal.

What its rejection is worth

For comparison, Alabama Power levies a Capacity Reservation Charge of $5.41 per kW of installed capacity per month, close to $470 a year on a typical system, and a federal court upheld it in March 2026.

Montana households with an equivalent system carry no such charge. Over a system life that difference is very large, and it is a substantial part of why Montana payback compares reasonably despite modest electricity prices and a northern climate.

Kansas reached a similar outcome by a different route, with its Supreme Court striking down Corporation Commission approval of additional Evergy fees on solar owners in early 2020.

So Montana sits with Kansas rather than with Alabama on this question, and that is worth knowing when comparing state-level guidance.

A decision, not a guarantee

Utilities across the country have continued to pursue solar-specific charges and rate classes after unsuccessful attempts, so a rejection settles the present rather than the future.

That is not a reason to hesitate, but it is a reason to ask what your projection assumes about charges over its term rather than treating the current position as fixed.

Ask whether any solar-specific charge appears in the quote. If one does, ask what it is and confirm it with the utility, because it should not be there under the current arrangement.

Ask also what ordinary fixed monthly charges apply, since those exist for every customer and do not fall when your consumption does.

What survives, and what to ask for

The 30 percent federal Residential Clean Energy Credit under Section 25D expired for property placed in service after December 31, 2025, so a cash or loan purchase in Missoula receives no federal tax credit. Confirm with the Montana Department of Revenue whether any state credit currently applies.

Section 48E survives at 30 percent for third-party owners under leases and power purchase agreements, so ask what a provider claims and what reaches you in the rate.

What exists is net metering with no solar-specific demand charge, credits accumulating across the year, and forfeit of unused credit at the annual settle-up.

Ask that ordinary fixed monthly charges be included in the projection and that no solar-specific charge appears in it.

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

Do Montana solar owners pay a demand charge?

No. NorthWestern Energy proposed ending net metering, creating a separate solar rate class and adding a demand charge, and the Montana Public Service Commission unanimously rejected that proposal.

What would a demand charge have meant?

Billing on your highest instantaneous draw rather than on total consumption, which is a structure households are poorly placed to manage and which can be substantial. A separate rate class is the mechanism that allows such charges.

How does Montana compare to other states on this?

Favourably. Alabama Power levies $5.41 per kW per month, close to $470 a year on a typical system, upheld in federal court in March 2026. Montana sits with Kansas, whose Supreme Court struck down a similar Evergy charge in 2020.

Could a charge be introduced later?

Utilities have continued to pursue such charges elsewhere after unsuccessful attempts, so a rejection settles the present rather than the future. Ask what your projection assumes about charges over its term.