Solar Panel Cost in Idaho (2026)
Installed solar in Idaho runs about $2.55 per watt — roughly 1% below the national average of $2.58/W. With the federal residential tax credit (25D) gone as of 2026, payback here rests on a $0.11/kWh power price and 4.9 daily peak sun hours.
Worked example: a typical $150/month home in Idaho
A $150/month electric bill in Idaho works out to about 16,364 kWh a year. Sizing a cash-purchase system to cover 100% of that:
System size
11.6 kW
Panels
29
Annual offset
101%
Gross cost
$32,080
Federal credit (25D)
$0
Expired 12/31/2025 — $0
State incentive
$0
Net cost
$32,080
Payback
14.3 yr
25-year savings
$34,331
Last updated June 30, 2026
Idaho solar numbers
- Installed price
- $2.55 / watt
- Electricity price
- $0.11 / kWh
- Peak sun hours
- 4.9 hrs/day
- State incentive
- 0%
- Net-metering value
- 100% of retail
Local context: Cheap hydro power lengthens Idaho paybacks despite solid sun.
Estimate your own Idaho system
Adjust the bill, ownership, and battery options below — it's pre-set to Idaho's pricing and sun hours.
Estimated system cost
$38,558–$50,082
16.4 kW41 panels
Low $39kMost likely ~$44,320High $50k
Federal tax credit
— expired Dec 2025, we won't pretend otherwise
$0
State & utility incentives
$0
Est. annual savings
$2,581
Payback period
~14.1 yr
Net cost
$39k–$50k
25-year net savings
+$49,571
iA ballpark estimate for planning — not a final quote.
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