A real cost breakdown for a typical 6kW system in Idaho, not just a national $/watt figure.
Idaho has one of the lower electricity rates in the country at approximately $0.11/kWh, and a solid, average solar resource at 5.0 peak sun hours a day. Combined with a regional installed-cost estimate of $2.70/watt, a standard 6kW residential system runs approximately $14,120 before any incentives.
| Line item | Estimated cost | Share of total |
|---|---|---|
| Equipment (panels, inverter, racking) | $8,910 | 63% |
| Labor / installation | $4,860 | 34% |
| Permitting & inspection | $350 | 2% |
| Total (before incentives) | $14,120 | 100% |
A 6kW system in Idaho costs 19% less than the average across the 25 states we track ($17,372), and the electricity rate it offsets is 32% lower than the 0.16 USD/kWh average across those same states. That combination is what actually determines whether Idaho is a faster- or slower-than-average place to go solar — a lower system cost alone doesn't help if the rate you're offsetting is also low, and vice versa. See how every state stacks up on the Electricity & Solar Rate Tracker.
At $964 in estimated annual value from 8,760 kWh of yearly production, this system pays back in roughly 15 years — a longer payback period than the national average. Idaho: Utility-specific net metering (varies by provider) up to a program cap. On incentives specifically: Idaho has no state solar tax credit, though a state income deduction for renewable energy device installation has existed in the past — verify current status. The federal residential tax credit (Section 25D) expired for owned systems after December 31, 2025 — see our 2026 tax credit guide for what that means for your net price.
A typical 6kW residential solar system in Idaho costs approximately $14,120 installed in 2026, based on a regional estimate of $2.35/watt — equipment usually makes up about 55% of that, labor about 30%, with the rest in permitting.
At Idaho's average rate of $0.11/kWh, a 6kW system pays back in roughly 15 years — a longer payback period than the national average. Your actual number depends on your usage and roof; check it precisely with the Solar Panel Cost Calculator.
A 6kW system in Idaho costs 19% less than the 25-state average of $17,372, while the electricity rate it offsets is 32% lower than the 0.16 USD/kWh average across those states.