Solar in Helena, MT
With NorthWestern Energy's electricity at about 15.4¢ per kWh and 1,328 kWh of sun per kW, solar is a close call for a typical Helena home today: about a 15.5-year payback.
- Payback, typical home
- 15.5 yrsMontana: 19.6 yrs
- 25-year net
- $12,227after paying $17,420
- Sun
- 1,328kWh per kW per year
- Electricity
- 15.4¢15% below U.S. average
A typical Helena home, by the numbers
| Utility | NorthWestern Energy |
|---|---|
| Electricity use | 707 kWh a month |
| Best-value system | 5.8 kW, about 13 panels, 7,702 kWh a year (91% of use) |
| Cost | $17,420 |
| First-year savings | $1,183 |
| Payback | 15.5 years |
| Exported power | Full retail net metering (NorthWestern Energy) |
Cash purchase, no federal credit, 1.8% yearly rate increases. Run it with your own numbers.
Homes in Helena
- Owner-occupied homes
- 53%
- Single-family detached
- 52%
- Median home value
- $387k
- Median year built
- 1974
- Population
- 33,639
Census ACS 2020–2024.
Older housing stock. Many homes here were built before 1975. Have the roof and electrical panel checked before signing; a roof or panel upgrade can add thousands. Roof first?
Installers working in Helena
Public installation records for Montana don't name installers, so we can't rank local companies here. Browse installers in Montana.
Always verify the license and get at least three quotes. Compare quotes side by side.
Questions about solar in Helena
Is solar worth it in Helena, MT?
For a typical home in Helena, solar is a close call at 2026 prices: a 5.8 kW system costs about $17,420 after state incentives, saves about $1,183 in year one and pays back in about 15.5 years. Enter your address for an estimate based on your roof and bill.
How much solar power does a system produce in Helena?
About 1,328 kWh per year for each kW of panels on a south-facing roof, based on PVWatts and local weather. That's 4% more than the Montana average. East- or west-facing roofs produce roughly 10–20% less.
Who is the electric utility in Helena?
Most homes in Helena are served by NorthWestern Energy, at about 15.4¢ per kWh on average.
How much do solar panels cost in Helena?
A fair cash price is around $2.90 per watt before incentives, so about $17,420 for a 5.8 kW system. There's no federal tax credit for homeowners who buy in 2026.
Nearby
- Butte-Silver Bow 15.7 yrs
- Great Falls 15.5 yrs
- Bozeman 16.3 yrs
- Missoula 17.3 yrs
- Kalispell no payback
- Billings 15.1 yrs
- All of Montana
Data: PVWatts (National Laboratory of the Rockies), EIA-861 2025 adjusted to 2026, U.S. Census ACS, LBNL Tracking the Sun, state policy research as of October 2026.