Idaho Solar in 2026: The Honest Picture

Idaho homeowners are installing solar at a steady pace, with over 85,000 systems deployed statewide to date. The state’s solar resources are moderate to good, particularly in southern Idaho around Boise and Twin Falls, where average daily solar irradiance reaches 4.8 kWh/m2. However, 2026 marks a significant shift in the federal incentive landscape: the Residential Clean Energy Credit (Section 25D) expired on December 31, 2025, and most homeowners buying systems outright will not qualify for a federal tax credit going forward.

This does not mean solar is no longer worthwhile in Idaho. The state offers meaningful incentives including a 100% property tax exemption, no state sales tax, partial net metering, and utility rebates. Combined with declining panel costs and strong electricity rate growth, many Idaho homeowners still see payback periods of 9 to 11 years and lifetime savings exceeding $25,000.

The key question for 2026 is whether state and utility incentives, plus operational savings, justify the upfront cost without federal support. The answer depends on your location, utility, and electricity usage.

Average Solar System Cost in Idaho (2026)

A typical 6 kW residential solar system in Idaho costs between $24,000 and $29,000 before incentives. This translates to roughly $4.00 to $4.85 per watt after accounting for equipment, labor, permitting, and interconnection.

Cost breakdown for a 6 kW system:

  • Solar panels (6 kW): $8,000 to $10,000
  • Inverter and balance of system: $4,500 to $5,500
  • Labor and installation: $6,000 to $8,000
  • Permitting, inspection, and interconnection: $2,000 to $3,000
  • Monitoring and miscellaneous: $1,500 to $2,500

Costs vary by installer, local labor rates, and roof complexity. Southern Idaho (Boise, Meridian) typically sees competitive pricing due to higher installer density. Rural areas may face higher labor costs and longer lead times.

For current pricing in your area, consult the EnergySage state cost benchmarks and request quotes from multiple installers.

Real Idaho Homeowner Savings (Sample Scenarios)

Savings depend on your location, utility, electricity rate, and system size. Here are five realistic scenarios:

Boise (Idaho Power, $0.135/kWh average rate): A 6 kW system produces approximately 7,500 kWh per year. Annual electricity savings: $1,010. Over 25 years: $25,250 (assuming 2% annual rate increases). After the $1,500 Idaho Power rebate and property tax exemption benefit (roughly $200/year), net 25-year savings: approximately $28,000. Payback period: 9.5 years.

Meridian (Idaho Power, $0.138/kWh average rate): A 6 kW system produces approximately 7,400 kWh per year. Annual savings: $1,020. Over 25 years: $25,500. With rebate and property tax exemption: approximately $28,500. Payback period: 9.3 years.

Pocatello (Idaho Power, $0.132/kWh average rate): A 6 kW system produces approximately 7,600 kWh per year. Annual savings: $1,003. Over 25 years: $25,075. With incentives: approximately $27,500. Payback period: 9.8 years.

Coeur d’Alene (Avista, $0.128/kWh average rate): A 6 kW system produces approximately 6,800 kWh per year (lower solar resource in northern Idaho). Annual savings: $870. Over 25 years: $21,750. With property tax exemption: approximately $23,500. Payback period: 10.8 years.

Twin Falls (Idaho Power, $0.140/kWh average rate): A 6 kW system produces approximately 7,700 kWh per year. Annual savings: $1,078. Over 25 years: $26,950. With rebate and property tax exemption: approximately $29,500. Payback period: 9.0 years.

These scenarios assume no major system degradation, stable electricity rates (conservative 2% annual increase), and no additional incentives beyond those listed. Actual savings will vary based on your roof orientation, shading, and specific utility rate structure.

Idaho Solar Incentives Still Available in 2026

Federal Tax Credit (Section 25D) - Expired for Most Homeowners

The Residential Clean Energy Credit under IRS Section 25D expired on December 31, 2025. Homeowners who purchased and placed a system in service by that date could claim up to 30% of installation costs. This credit is no longer available for new purchases in 2026.

The only federal pathway remaining is a third-party-owned solar lease under Section 48E (Investment Tax Credit for energy property). However, the contractor must begin construction before July 4, 2026. Most homeowners financing or purchasing systems outright will not benefit from federal incentives in 2026.

Idaho Property Tax Exemption

Idaho exempts the full assessed value of residential solar systems from property tax. This means your home’s assessed value will not increase due to the solar installation, saving you approximately $150 to $300 per year in property taxes depending on your county’s tax rate. Over 25 years, this exemption is worth roughly $5,000 to $10,000 in avoided taxes.

This exemption applies to both owned and leased systems and is one of Idaho’s strongest solar incentives.

No State Sales Tax

Idaho has no state sales tax. Solar equipment, panels, inverters, and installation labor are not subject to state-level sales tax. Some local jurisdictions impose local option taxes (1% to 3%), so confirm with your installer whether your area is affected.

Net Metering (Partial)

Idaho Power Company and Avista Corporation offer net metering for residential solar customers. Excess electricity generated during the day is credited to your account at the retail electricity rate. These credits can offset usage during evening hours or winter months.

However, net metering in Idaho is not unlimited. Idaho Power caps net metering credits and may adjust rates or impose time-of-use pricing. Avista similarly limits net metering benefits. Check your utility’s specific rules before installation.

Idaho Power Rebate Program

Idaho Power offers rebates up to $1,500 for residential solar installations. The rebate is typically paid after system completion and verification. Eligibility and rebate amounts may vary by service territory and program year. Contact Idaho Power directly or ask your installer about current rebate availability.

USDA Rural Energy for America Program (REAP)

Rural Idaho homeowners may qualify for grants or guaranteed loans through the USDA Rural Energy for America Program. This program can cover up to 25% of project costs for solar installations on agricultural or rural properties. Funding is competitive and limited, so apply early if eligible.

Additional Resources

For a comprehensive list of current Idaho solar incentives, visit the DSIRE state incentive database, which tracks all active federal, state, and utility programs.

Is Solar Worth It in Idaho Without the Federal Credit?

Without the federal tax credit, the decision to go solar in Idaho hinges on three factors: your electricity rate, your local solar resource, and your long-term plans.

Strong case for solar:

  • You live in southern Idaho (Boise, Twin Falls, Pocatello) with good solar resources (4.8+ kWh/m2/day).
  • Your electricity rate is above $0.13/kWh (most Idaho Power customers qualify).
  • You plan to stay in your home for at least 10 years.
  • You want to lock in electricity costs against future rate increases.

In these scenarios, payback periods of 9 to 10 years are realistic, and 25-year savings exceed $25,000. The property tax exemption and utility rebates provide meaningful support.

Weaker case for solar:

  • You live in northern Idaho (Coeur d’Alene, Sandpoint) with lower solar resources (4.2 to 4.5 kWh/m2/day).
  • Your electricity rate is below $0.12/kWh (some rural cooperatives).
  • You plan to move within 7 years.
  • Your roof has significant shading or poor orientation.

In these cases, payback periods may stretch to 11 to 13 years, and lifetime savings may fall below $20,000. Solar is still viable but requires stronger personal commitment to clean energy.

Financing matters:

  • Purchasing outright: You own the system, claim the property tax exemption, and receive all operational savings. No federal credit available.
  • Home equity loan or HELOC: Similar to purchase; you own the system and all benefits.
  • Third-party lease: A company owns the system and retains the federal Section 48E credit (if available before July 4, 2026). You pay a fixed monthly lease payment, typically 20% to 30% lower than your current electricity bill. You do not claim the property tax exemption, but you have no upfront cost and predictable payments.

For most Idaho homeowners in 2026, a cash purchase or home equity loan remains the best path to maximize savings, given the loss of the federal credit.

Top Cities for Solar in Idaho

  • Boise: Highest installer density, competitive pricing, strong solar resources (4.9 kWh/m2/day), and above-average electricity rates ($0.135/kWh). Excellent market for solar adoption.
  • Twin Falls: Exceptional solar resources (4.9 kWh/m2/day), high electricity rates ($0.140/kWh), and growing installer network. One of Idaho’s best solar markets.
  • Meridian: Suburban Boise area with similar solar resources and rates. Strong market with multiple installers.
  • Pocatello: Good solar resources (4.7 kWh/m2/day), moderate electricity rates, and emerging solar market. Fewer installers than Boise but competitive pricing.
  • Nampa: Western Idaho location with solid solar resources (4.8 kWh/m2/day) and reasonable electricity rates. Growing installer presence.
  • Coeur d’Alene: Northern Idaho with lower solar resources (4.2 kWh/m2/day) and Avista service. Longer payback periods but still viable for committed homeowners.

What to Look for in an Idaho Solar Installer

  1. Licensing and Insurance: Verify the installer holds an active Idaho electrical contractor license and carries general liability and workers’ compensation insurance. Check the Idaho Division of Occupational and Professional Licenses database.

  2. Experience and References: Ask for at least three recent customer references in your area. Call them and ask about installation quality, timeline, and post-installation support. Prefer installers with 5+ years of experience in Idaho.

  3. Warranty Coverage: Ensure the installer offers a 10-year workmanship warranty and can document manufacturer warranties on panels (25+ years) and inverters (10+ years). Understand what is covered and the process for claims.

  4. Utility Interconnection Knowledge: The installer should be familiar with your specific utility’s interconnection process, net metering rules, and rebate programs. Ask how they handle permitting and utility approval.

  5. Transparent Pricing: Request a detailed written quote that breaks down equipment, labor, permitting, and incentives. Avoid installers who are vague about costs or pressure you to decide quickly.

  6. Monitoring and Support: Confirm the system includes real-time monitoring (web or app-based) and that the installer provides ongoing technical support. Ask about response times for service calls.

  7. Financing Options: Verify the installer can facilitate your preferred financing method (cash, loan, lease) and can explain the pros and cons of each. Avoid installers who push only one financing option.

Get Free Quotes From Vetted Idaho Installers

The best way to understand solar costs and savings for your specific home is to request quotes from multiple installers. Most reputable solar companies offer free consultations and written proposals with no obligation.

When comparing quotes, focus on:

  • Total system cost ($/watt)
  • Estimated annual production (kWh)
  • 25-year savings estimate
  • Warranty terms
  • Financing options and terms

Use online tools like NREL solar resource maps to verify the solar resource at your address. Cross-check installer estimates against SEIA state market data and EnergySage benchmarks.

Request quotes today from vetted Idaho installers to see how much you can save.

Sources for 2026 data: IRS Section 25D guidance, DSIRE state incentive database, Idaho Division of Occupational and Professional Licenses, Idaho Power Company, Avista Corporation, SEIA state market data, NREL solar resource maps, EnergySage state cost benchmarks, USDA Rural Energy for America Program.