Solar in Lehi, UT: 2026 Cost, Savings & Payback
Calculate 2026 solar panel cost, payback, and 25-year bill savings in Lehi, Utah. Based on 5.4 peak sun hours/day, 11.6¢/kWh average electricity rate, Rocky Mountain Power utility context, and current IRS guidance for the ended federal residential clean energy credit.
Solar in Lehi, UT: quick answer
A typical 6kW solar system in Lehi costs about $16,440 before local or state incentives. For 2026 installs, the federal residential clean energy credit is modeled as $0, so the estimated cost remains about $16,440 before any local incentive. It produces about 9,224 kWh per year from 5.4 peak sun hours/day, saves about $1,068 per year, and reaches payback in about 15.4 years.
2026 6kW Cost
$16,440
Monthly Savings
$89
Production / kW
1,537 kWh
Panel Count
~15
5.4
Peak Sun Hours/Day
11.6¢
Avg Rate (¢/kWh)
15.4 yr
Payback Period
$37k
25-Year Savings
Lehi Solar Overview
Calculate Your Lehi Solar Savings
Lehi average: $104/mo
South-facing roofs produce the most energy
Add $8,000-$12,000 for whole-home battery backup
Annual Production
kWh/year
Annual Savings
per year
Net System Cost
after 2026 federal credit
Payback Period
break-even time
Bill Offset and Export Assumptions
Current Annual Bill
$1,248
Estimated Usage
10,777 kWh
Bill Offset
88%
Used On Site
100%
Exported production is discounted in this planning model instead of being treated as a guaranteed one-for-one bill credit. For Lehi, verify the current Rocky Mountain Power export-credit method and any fixed monthly charges before relying on the payback number.
25-Year Total Savings
$37,437
Monthly Savings
$91
2026 Federal Credit
$0
Cumulative Savings vs System Cost
Cost Breakdown
| Item | Lehi | National Avg |
|---|---|---|
| Gross System Cost (6kW) | $16,440 | $17,100 |
| 2026 Federal Residential Credit | -$0 | $0 |
| Net System Cost | $16,440 | $17,100 |
| Cost Per Watt | $2.74/W | $2.85/W |
Solar Potential in Lehi
Sun Hours vs National Average
Lehi gets 20% more sun than the national average.
Climate Advantages
- 242 sunny days per year
- Average temperature: 53°F — cooler temps actually improve panel efficiency
- Average roof size: 1,582 sq ft — enough for a 87-panel system
Lehi Solar Incentives & Programs
Federal Investment Tax Credit (ITC)
For 2026 planning, JouleIO does not subtract a federal residential clean energy credit. The IRS says the Residential Clean Energy Credit was 30% for eligible property installed from 2022 through December 31, 2025, and is not available for property placed in service after December 31, 2025.
Source: IRS Residential Clean Energy Credit and IRS One Big Beautiful Bill provisions.
Utah State Incentives
Federal residential solar credit ended for 2026 homeowner-owned systems placed in service after Dec. 31, 2025; check local utility for additional rebates
Net Metering — Rocky Mountain Power
Rocky Mountain Power offers net metering in Lehi. Earn credits for excess solar energy sent to the grid, reducing your electric bill further.
Environmental Impact in Lehi
3.9
Tons CO2 Offset/Year
65
Equivalent Trees Planted
0.9
Homes Worth of Energy
Based on 9,461 kWh annual production with a 6kW system. EPA average: 0.417 metric tons CO2 per MWh, 10,632 kWh per US home.
Solar Energy in Lehi, Utah
Lehi, Utah receives an average of 5.4 peak sun hours per day, providing excellent conditions for residential solar installations. With electricity rates averaging 11.6¢ per kWh from Rocky Mountain Power, below the national average, but with rates rising 2-3% annually, the long-term savings are still meaningful.
A typical 6kW solar system in Lehi produces approximately 9,461 kWh per year, saving homeowners an estimated $1,096 annually. The system pays for itself in about 15.0 years, after which you enjoy essentially free electricity for the remaining 10+ years of the system's warranty life.
Lehi has a solar penetration rate of 4.3% — indicating early-stage solar adoption with tremendous growth potential as prices continue to fall. The cost of living index of 103.5 (national average: 100) is near the national average.
Other Cities in Utah
Methodology & Solar Data Sources for Lehi
How we calculate Lehi solar potential and savings: Solar production estimates use NREL's PVWatts calculator methodology, applied to Lehi's specific solar irradiance (peak sun hours), tilt angle, and azimuth. Cost figures combine NREL's Annual Technology Baseline for system pricing, ENERGY STAR's database for residential PV averages, and EIA Form 861 utility rate data for Utah.
- Solar irradiance for Lehi: based on NREL National Solar Radiation Database (NSRDB) — 30-year average peak sun hours per day.
- System sizing assumes residential rooftop installation with standard 350-400W panels, calibrated to typical Lehi household electricity usage.
- Federal tax credit: modeled as 0% for 2026 residential installations because IRS guidance says the Residential Clean Energy Credit is not available for property placed in service after December 31, 2025.
- Net metering assumes 1:1 retail-rate compensation typical in Utah (verify with local utility — some have shifted to net billing or avoided-cost rates).
- System lifetime standard 25 years with annual degradation of 0.5%/year per industry warranty norms.
Authoritative US solar data sources:
- NREL PVWatts Calculator — official US solar production estimator
- NREL National Solar Radiation Database — 30-year solar irradiance data
- IRS Residential Clean Energy Credit — 2026 federal residential credit status
- IRS One Big Beautiful Bill provisions — clean energy credit expiration overview
- DSIRE — State Solar Incentives — searchable database for Utah
- EIA Electric Power Monthly — Utah utility rate data
- ENERGY STAR Solar — efficient solar product database
Solar Disclaimer: Solar savings vary based on roof orientation, shading, system quality, installer markup, financing terms, utility rate plan, and policy changes. Always get 3+ quotes from NABCEP-certified installers and review contracts carefully. Tax credit eligibility depends on tax liability — consult a tax professional.
Reviewed by Brazora Monk · Last updated 2026 · NREL irradiance data per NSRDB latest release
Frequently Asked Questions
How much do solar panels cost in Lehi, UT?
The average cost of a 6kW solar panel system in Lehi is approximately $16,440 before local or state incentives ($2.74/watt). For 2026 planning, this calculator does not subtract a federal residential clean energy credit because IRS guidance says the credit is not available for property placed in service after December 31, 2025. Federal residential solar credit ended for 2026 homeowner-owned systems placed in service after Dec. 31, 2025; check local utility for additional rebates
How many solar panels do I need in Lehi, UT?
A typical 6kW residential solar system in Lehi needs about 15 panels if each panel is rated near 400 watts. That system produces about 9,224 kWh per year in this estimate, or roughly 1,537 kWh per installed kW before shading, roof orientation, and inverter losses are customized.
How many peak sun hours does Lehi get?
Lehi, UT receives an average of 5.4 peak sun hours per day and approximately 242 sunny days per year. This is above the national average of 4.5 hours, making it an excellent location for solar energy.
What is the solar payback period in Lehi?
The average solar payback period in Lehi is approximately 15.4 years for a 6kW cash-price estimate before local or state incentives. After payback, your solar panels generate essentially free electricity for the remaining warranty life. Over 25 years, bill savings can reach about $36,480 before subtracting installation cost.
Does Lehi have net metering?
Yes, Lehi has access to net metering through Rocky Mountain Power. This allows you to earn credits for excess solar energy sent to the grid, but the final savings depend on the current utility tariff and fixed monthly charges.
Is solar worth it in Lehi, UT in 2026?
Solar may still be worthwhile in Lehi, especially for homeowners with high usage or strong local incentives, but the 15.4-year payback means quote comparison matters. For 2026 installs, JouleIO does not assume a federal residential credit; local incentives and net metering are the main financial drivers.