EnergyTools

Solar Panel Cost in Idaho Falls, ID

Estimated costs and savings for ZIP code 83402 — 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

$20,300

7kW system

Annual Savings

$1,642

$137/month

Payback Period

12.4 yrs

Break-even

Peak Sun Hours

4.2

hrs/day avg

Solar System Cost Breakdown — Idaho Falls, ID

Estimated costs and savings for different residential solar system sizes in ZIP 83402. Costs based on ID average of $2.90/W and utility rate of $0.18/kWh.

System Cost Savings/yr Payback
4 kW $11,600 $938 12.4 yrs
5 kW $14,500 $1,173 12.4 yrs
6 kW $17,400 $1,407 12.4 yrs
7 kW (typical) $20,300 $1,642 12.4 yrs
8 kW $23,200 $1,876 12.4 yrs
10 kW $29,000 $2,346 12.4 yrs

Solar Production in Idaho Falls, Idaho

Average Peak Sun Hours

4.2 hours/day

Moderate solar resource — still cost-effective

Est. Annual Production (7kW)

9,121 kWh

Based on 4.2 PSH × 7kW × 365 days × 85% efficiency

Average Utility Rate

$0.18/kWh

High utility rates make solar especially valuable

Cost Per Watt in ID

$2.90/W

Below national average — competitive market

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Solar Panel FAQ — Idaho Falls, ID

How much do solar panels cost in Idaho Falls, ID?
A typical 7kW solar system in Idaho Falls, ID (ZIP 83402) costs approximately $20,300 before any incentives. This works out to about $2.90 per watt installed. Smaller systems start around $11,600, while larger 10kW systems can cost up to $29,000.
How long is the solar payback period in Idaho Falls?
The average solar payback period in Idaho Falls, ID is approximately 12.4 years for a 7kW system. With estimated annual savings of $1,642, 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 83402?
Homeowners in Idaho Falls, ID (ZIP 83402) can save approximately $137 per month or $1,642 per year with a standard 7kW solar system. Over 25 years, total savings can exceed $41,050, depending on utility rate increases.
How many peak sun hours does Idaho Falls get?
Idaho Falls, ID receives an average of 4.2 peak sun hours per day. This is near the national average, making solar a solid investment in this area.
What size solar system do I need for my home in Idaho Falls?
The average home in Idaho Falls, ID 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 9,121 kWh annually in ZIP 83402.

Solar Tools for Idaho

ROI Calculator

Exact payback analysis

System Sizer

Find your ideal kW

Incentive Finder

ID rebates & credits

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