Data page · Mountain region

Solar Panel Cost in Idaho (2026)

A typical Idaho rooftop system costs around $2.85/W cash, installed, before incentives — with most quotes landing between $2.6/W and $3.15/W. The federal residential tax credit is $0 for 2026 installations (it ended 12/31/2025).

Market estimate · compiled 2026-08 · sources: marketplace reports, NREL, EIA, state programs — see methodology.

Rooftop solar panels on a Mountain-West home with a mountain backdrop in Idaho. — Typical Mountain-West home with a rooftop solar array.

The federal residential solar tax credit (30% §25D) ended December 31, 2025.

Under the One Big Beautiful Bill Act, systems placed in service on or after January 1, 2026 do not qualify for the residential credit. Systems installed and operational by December 31, 2025 can still be claimed at 30% on the 2025 return. Commercial and third-party-owned (lease/PPA) projects may qualify under §48E — see the federal incentives page.

Status verified 2026-08-21. Confirm your circumstances with a qualified tax professional.

Typical cash price / watt

$2.85

range $2.60–$3.15 $/W

10 kW system (gross)

$28,500

$26,000–$31,500 · before incentives

Avg electricity rate

12.35¢/kWh

EIA May 2026 · avg use 944 kWh/mo

Export / net-metering

retail nem

Retail net metering.

Cost by system size

Gross installed cash price, before incentives. Net cost in 2026 = gross − $0 federal − any verified state/local incentive (see below).

Solar cost by system size in Idaho
System size	Gross price range	≈ $/W	Panels (400–450 W)	≈ Production/yr
5 kW	$13,000–$15,750	$2.85	12–13	6,368 kWh
8 kW	$20,800–$25,200	$2.85	18–20	10,189 kWh
10 kW	$26,000–$31,500	$2.85	23–25	12,737 kWh
15 kW	$39,000–$47,250	$2.85	34–38	19,105 kWh

Solar resource & economics

Production factor (est.): 1481 kWh/kW/yr
10 kW annual production (est.): 12,737 kWh
Year-1 savings for 10 kW at avg rate, 35% self-use: $1,573
Simple payback (net cost ÷ Yr-1 savings, rough): ≈ 36 yrs

These are rough planning numbers. Model your exact scenario in the price calculator — assumptions are visible and adjustable.

Export policy detail

Retail net metering.

Why it matters: if exports are credited at the retail rate (1:1 net metering), every kWh counts the same. Under net billing or avoided-cost export, storing daytime power (battery) or shifting use matters far more. Your utility’s tariff — not the state average — decides this. Utility records

Incentives in Idaho (status-aware)

Property tax exemption for solar

Current

Exempt from property tax

Confirmed current.

Source: Idaho Statutes · Last checked 2026-08-21

Tax exemptions: Property tax — current: Solar exempt from property tax.

Federal residential credit (§25D): expired 12/31/2025 — $0 for 2026 installations. Commercial/third-party-owned projects: see federal incentives.

Local considerations

Among the cheapest electricity in the US (~$0.12/kWh) → long paybacks; solar is often an environmental/independence choice.
Cheap hydro keeps grid prices low.

Battery note: batteries add roughly $1,000–$2,000/kWh installed and rarely pay for themselves on energy savings alone. In Idaho, storage value depends on your export policy (retail nem), TOU rates and outage risk — model it in the battery calculator.

Nearby states

Colorado Montana Nevada Utah

Next steps

Run the price calculator Analyze a quote Incentive finder

Every estimate on this page is a planning range — only a site inspection and real quote give an exact price.

Data sources: EIA Electric Power Monthly (rates, May 2026) · NREL (solar resource) · marketplace cost reports & state programs (cost estimates, 2026) · incentive records last checked 2026-08-21. Full detail in methodology.