Montana still nets solar at the full retail rate, a deal its regulators defended and most states abandoned. The trap is a single date: once a year, at your settle-up month, every unused credit resets to zero. Bank a summer of surplus into the wrong month and Montana law simply deletes it. Size right and pick that date deliberately, and Big Sky solar quietly outperforms its reputation. EcoGen America handles both decisions.
Get your feasibility score, cost estimate & installer matches.
NorthWestern Energy credits exported solar at the full retail rate, one-to-one, and the Public Service Commission rejected attempts to weaken that arrangement, holding retail netting in place until rooftop adoption reaches 5% of peak load. Genuine one-to-one crediting survived here.
The statutory catch: at your annual settle-up month, unused credits reset to zero. There is no cash-out, no rollover, no avoided-cost consolation. Whatever sits in the bank vanishes.
Both design decisions follow from that: size close to annual usage so little surplus survives to be deleted, and set the settle-up month, typically end of winter, so summer banking gets spent through the heating season first.
EcoGen America runs Montana math with the reset in the model and matches you with installers who build for it.
Installers working NorthWestern interconnections and Montana co-ops, from Bozeman to Missoula to Helena.
Built-in checks for reset-blind projections, oversized arrays feeding the annual deletion and dead-credit lines.
Our models spend banked credits through winter before the reset. Optimistic quotes pretend the reset does not exist.
Your information goes only to the installers you choose to hear from. Nothing is resold.
EcoGen is 100% free for homeowners. We earn a small referral fee from installers only when you choose to proceed with a project through our platform.
This fee comes from the installer’s marketing budget and does not increase your system price. In fact, our pre-negotiated rates often save you money compared to going direct.
Montana”s netting is generous right up until one date on the calendar. How the reset works, and how to beat it:
The Rule | What Happens | The Countermove |
|---|---|---|
Monthly banking | Surplus credits roll forward at full retail value | Bank summer production against winter bills, as designed |
Annual settle-up | Remaining credits reset to zero, uncompensated | Choose a settle-up month at winter”s end, when the bank is naturally empty |
Oversizing | Chronic surplus feeds the annual deletion | Size to roughly 100% of annual usage, not the roof”s maximum |
Handled deliberately, the reset costs a well-designed system almost nothing. Ignored, it quietly deletes a month or two of production every year.
Montana summers produce hard. Retail-rate banking turns July sun into January heat, if the system is sized to spend it.
Set your settle-up month at the end of heating season. It is one form field that protects a winter's worth of credits.
Design so the bank empties before the reset: size near annual usage and let winter draw it down.
Free 15-minute call. Sizing, timing, honest Montana math.
Montana solar owners hold a stronger legal position than most, worth knowing when a sales pitch turns apocalyptic or a neighbor turns skeptical:
In a region where Idaho pays 2.9¢ off-peak and Wyoming saves rather than earns, Montana”s retail netting is the quiet outlier worth acting on while it stands.
Montana Contract Checks
Retail netting with a reset invites specific mistakes. These four catch them.
A projection that rolls credits forever overstates value. The annual zero-out belongs in the math.
The reset date is selectable and most installers never mention it. End of heating season is the right answer.
Chronic overproduction feeds the deletion. Montana rewards accuracy over ambition.
Montana roofs carry real snow. Mounting spec and structural review are not formalities here.
Four checks, any Montana quote. Good installers answer them without blinking.
Vetted for Montana coverage, NorthWestern interconnection experience and complaint history.
Retail netting forgives a lot, but not everything:
Everyone else under that big sky: retail netting plus honest sizing makes Montana one of the Mountain West”s better-kept solar secrets.
Priced against the honest band with the annual reset in the model.
15 minutes, independent. Banking, timing, sizing, verdict.
Talk to a Montana AdvisorNo obligation. 100% free service.
Yes, real one-to-one retail crediting at NorthWestern Energy, protected by the PSC until rooftop adoption reaches 5% of peak load.
Cooperative territories set their own terms, so rural customers should get their co-op’s tariff in writing.
At your annual settle-up month they reset to zero, with no cash-out. That single rule shapes good Montana design: size near your annual usage and set the settle-up month at the end of heating season so the bank empties naturally first.
Handled deliberately, the reset costs a well-designed system almost nothing.
For owned roofs with decent sun, genuinely yes: full retail netting is the strongest export deal in the Mountain West, and summer banking carries winter bills.
The failures are oversized arrays feeding the annual reset and shaded roofs that never produce the credits in the first place.
No state credit remains, and the federal residential credit ended in December 2025.
Montana’s incentive is structural: retail-rate netting that most states no longer offer. It shows up on the bill rather than the tax return.