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Solar Panel Cost in Billings, MT

Estimated costs and savings for ZIP code 59101 — updated for 2026

Urgent tax credit deadlines

  • Section 30D EV credit (up to $7,500) — expires June 30, 2026 (12 days left).
  • Section 48E solar ITC safe harbor — construction must start by July 4, 2026 (16 days left).
See the full deadline tracker

Gross Cost

$21,000

7kW system

Annual Savings

$1,355

$113/month

Payback Period

15.5 yrs

Break-even

Peak Sun Hours

3.9

hrs/day avg

Solar System Cost Breakdown — Billings, MT

Estimated costs and savings for different residential solar system sizes in ZIP 59101. Costs based on MT average of $3.00/W and utility rate of $0.16/kWh.

System Cost Savings/yr Payback
4 kW $12,000 $774 15.5 yrs
5 kW $15,000 $968 15.5 yrs
6 kW $18,000 $1,162 15.5 yrs
7 kW (typical) $21,000 $1,355 15.5 yrs
8 kW $24,000 $1,549 15.5 yrs
10 kW $30,000 $1,936 15.5 yrs

Solar Production in Billings, Montana

Average Peak Sun Hours

3.9 hours/day

Lower solar resource — longer payback but still viable

Est. Annual Production (7kW)

8,470 kWh

Based on 3.9 PSH × 7kW × 365 days × 85% efficiency

Average Utility Rate

$0.16/kWh

Above-average rates — good solar savings potential

Cost Per Watt in MT

$3.00/W

Near national average for installed cost

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Solar Panel FAQ — Billings, MT

How much do solar panels cost in Billings, MT?
A typical 7kW solar system in Billings, MT (ZIP 59101) costs approximately $21,000 before any incentives. This works out to about $3.00 per watt installed. Smaller systems start around $12,000, while larger 10kW systems can cost up to $30,000.
How long is the solar payback period in Billings?
The average solar payback period in Billings, MT is approximately 15.5 years for a 7kW system. With estimated annual savings of $1,355, the system pays for itself and then generates free electricity for the remaining 15-20+ years of its lifespan.
How much can I save with solar panels in 59101?
Homeowners in Billings, MT (ZIP 59101) can save approximately $113 per month or $1,355 per year with a standard 7kW solar system. Over 25 years, total savings can exceed $33,875, depending on utility rate increases.
How many peak sun hours does Billings get?
Billings, MT receives an average of 3.9 peak sun hours per day. This is below the national average, making solar still viable but with longer payback in this area.
What size solar system do I need for my home in Billings?
The average home in Billings, MT needs a 7kW solar system to offset their electricity usage. The exact size depends on your monthly electric bill, roof orientation, and available space. A 7kW system would produce approximately 8,470 kWh annually in ZIP 59101.

Solar Tools for Montana

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Incentive Finder

MT rebates & credits

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