Solar in Nampa, ID
With Idaho Power's electricity at about 12.6¢ per kWh and 1,442 kWh of sun per kW, solar is not worth it for a typical Nampa home today: about a 18.1-year payback.
- Payback, typical home
- 18.1 yrsIdaho: 18.3 yrs
- 25-year net
- $3,697after paying $8,649
- Sun
- 1,442kWh per kW per year
- Electricity
- 12.6¢30% below U.S. average
A typical Nampa home, by the numbers
| Utility | Idaho Power |
|---|---|
| Electricity use | 899 kWh a month |
| Best-value system | 3.7 kW, about 9 panels, 5,334 kWh a year (49% of use) |
| Cost | $14,415, or $8,649 after state incentives |
| First-year savings | $533 |
| Payback | 18.1 years |
| Exported power | 4.5¢/kWh (Idaho Power) |
Cash purchase, no federal credit, 1.8% yearly rate increases. Run it with your own numbers.
Homes in Nampa
- Owner-occupied homes
- 70%
- Single-family detached
- 75%
- Median home value
- $371k
- Median year built
- 2000
- Population
- 110,319
- Roofs suitable for solar†
- 93%
Census ACS 2020–2024. †Share of 27,451 buildings Google Project Sunroof rated technically suitable (2019 snapshot).
Installers working in Nampa
Public installation records for Idaho don't name installers, so we can't rank local companies here. Browse installers in Idaho.
Always verify the license and get at least three quotes. Compare quotes side by side.
Questions about solar in Nampa
Is solar worth it in Nampa, ID?
For a typical home in Nampa, solar is not worth it at 2026 prices: a 3.7 kW system costs about $8,649 after state incentives, saves about $533 in year one and pays back in about 18.1 years. Enter your address for an estimate based on your roof and bill.
How much solar power does a system produce in Nampa?
About 1,442 kWh per year for each kW of panels on a south-facing roof, based on PVWatts and local weather. That's 1% more than the Idaho average. East- or west-facing roofs produce roughly 10–20% less.
Who is the electric utility in Nampa?
Most homes in Nampa are served by Idaho Power, at about 12.6¢ per kWh on average.
How much do solar panels cost in Nampa?
A fair cash price is around $3.45 per watt before incentives, so about $14,415 for a 3.7 kW system. There's no federal tax credit for homeowners who buy in 2026.
Nearby
- Caldwell 18.3 yrs
- Meridian 17.6 yrs
- Kuna 17.6 yrs
- Eagle 18 yrs
- Boise City 17.9 yrs
- Twin Falls 17 yrs
- Lewiston 18 yrs
- Pocatello 17.7 yrs
- All of Idaho
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.