Solar in Idaho Falls: What Homeowners Should Know
Idaho Falls sees an average of 5.1 peak sun hours per day, which is what ultimately determines how much electricity a rooftop system produces here. A standard 8 kW system (about 20 panels) generates roughly 11,914 kWh each year in Idaho Falls — and paired with Idaho's local electricity rate of $0.090/kWh, that's where the savings come from.
At those numbers, a Idaho Falls homeowner saves about $89/month ($1,072/year). Against a $23,200 system cost (about $21,200 after Idaho state incentives), that works out to a payback of about 19.8 years, after which the system produces essentially free power for two decades — an estimated $15,425 in lifetime savings. Note: the 30% federal tax credit expired at the end of 2025 for purchased systems, though a solar lease or PPA can still pass it through. The local grid is served by Rocky Mountain Power, whose net metering policy directly affects how much credit you earn for surplus power.
Cost & Savings Breakdown
Based on a standard 8 kW system in Idaho Falls
25-Year Savings Projection
Utility & Net Metering
Available Incentives
Choosing a Solar Installer in Idaho Falls
- 1.Get at least 3 quotes. Prices in Idaho vary widely between installers — comparing bids on the same 8 kW system is the fastest way to avoid overpaying.
- 2.Confirm Rocky Mountain Power interconnection experience. An installer who regularly files with your local utility will move your permit and net-metering paperwork through faster.
- 3.Check licensing & the warranty. Look for NABCEP-certified installers and a workmanship warranty of 10+ years on top of the standard 25-year panel warranty.
- 4.Size for your actual usage. With 5.1 sun hours/day in Idaho Falls, make sure the proposed system matches your kWh history — not just your roof space.
Common Questions
How much does solar cost in Idaho Falls?
Solar in Idaho Falls, Idaho costs approximately $23,200 for a 8 kW system, or about $21,200 after state incentives. The 30% federal tax credit expired December 31, 2025 for purchased systems, though solar leases and PPAs can still pass it through.
What is the solar payback period in Idaho Falls?
The estimated payback period for solar in Idaho Falls is 19.8 years for a standard 8 kW system, based on local sun hours of 5.1 hrs/day and a rate of $0.090/kWh.
Is solar worth it in Idaho Falls?
For most Idaho Falls homeowners, yes. With 5.1 peak sun hours per day and an electricity rate of $0.090/kWh, a typical system saves $1,072 per year and around $15,425 over 25 years after paying for itself in 19.8 years.
How many solar panels do I need in Idaho Falls?
A standard 8 kW home solar system is about 20 panels, producing roughly 11,914 kWh per year in Idaho Falls at 5.1 sun hours/day. Your exact size depends on your household's electricity use.
Does Rocky Mountain Power offer net metering?
Rocky Mountain Power offers Full Retail net metering. Full retail rate.