Solar panels in Lehi: what they cost and what they make
A typical Lehi home needs 15 solar panels. They would make about 9,885 kWh a year and cost $16k to $24k before incentives. At today's electricity prices they pay for themselves in about 14.2 yrs.
See panels on your own Lehi roof
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What solar costs in Lehi
At $3.00 a watt, the median price cash buyers pay nationally, a 6.3 kW system costs about $18,900. Quotes in Lehi will usually fall between $15,750 and $23,625. Complex roofs, main-panel upgrades and financing push prices up.
The 30% federal tax credit no longer applies to systems homeowners buy. This estimate includes no state or utility incentives; check with your utility before you buy.
The number that decides whether solar pays in Lehi is what your utility pays for the power you send back. Under full payback is about 14.2 yrs. Under net billing it is about 23.4 yrs, because only the ~41% of solar a typical home uses as it is made saves the full retail price.
Cash purchase, prices rising 2.5% a year, panels losing 0.5% a year, $25/kW a year for upkeep. No federal credit for homeowner-owned systems.
Every way to pay for a 6.3 kW system in Lehi
Change any number →| Way to pay | Day one | Monthly payment | Monthly net, year 1 | Ahead after 25 years |
|---|---|---|---|---|
| Pay cash Full price on install day | $18,900 | $0 | +$95 | $19k |
| Credit-union loan 8% APR, 20 years, no dealer fee | $0 | $158 | −$63 | −$300 |
| “1.99%” solar loan 1.99% APR, 25 years, 25% dealer fee | $0 | $100 | −$5 | $7,700 |
| Lease $90/mo, +2.9%/yr | $0 | $90 | +$18 | $2,700 |
| Power purchase (PPA) 11.2¢/kWh, +2.9%/yr | $0 | $92 | +$16 | $4,300 |
Under net metering, at 13.2¢/kWh rising 2.5% a year. The “1.99%” loan’s $4,725 dealer fee is included in its payments. Lease and PPA prices are typical offers, not quotes.
How much sunshine Lehi gets
kWh per kW, 25° southJun is the best month for solar in Lehi, and Dec the weakest: a Dec day makes 46% of a Jun day. A 6 kW system would make about 461 kWh in Dec and 1,000 kWh in Jun.
On June 21 the sun rises at 5:57 am and sets at 9:01 pm, 15 hours 4 minutes of daylight. On December 21 it is up from 7:47 am to 5:04 pm, just 9 hours 17 minutes.
Peak sun hours in Lehi, month by month
| Month | Flat ground | Panels at 37° | kWh per kW |
|---|---|---|---|
| Jan | 2.2 | 3.9 | 89 |
| Feb | 3.2 | 4.7 | 100 |
| Mar | 4.5 | 5.7 | 137 |
| Apr | 5.7 | 6.1 | 146 |
| May | 6.7 | 6.3 | 159 |
| Jun | 7.8 | 6.9 | 167 |
| Jul | 7.5 | 6.8 | 165 |
| Aug | 6.6 | 6.8 | 158 |
| Sep | 5.4 | 6.7 | 147 |
| Oct | 3.9 | 5.7 | 129 |
| Nov | 2.5 | 4.4 | 95 |
| Dec | 1.9 | 3.4 | 77 |
| Year | 4.8 | 5.6 | 1,569 |
A peak sun hour is one hour of sunlight at 1,000 W per m². Why sites disagree.
The best angle and direction for panels in Lehi
| Roof faces (6/12 pitch) | Output vs south | kWh per kW |
|---|---|---|
| South | 100% | 1,569 |
| Southeast | 95% | 1,491 |
| Southwest | 95% | 1,491 |
| East | 83% | 1,302 |
| West | 82% | 1,287 |
| North | 60% | 941 |
Face panels south and tilt them 37° for the most energy over a year. East and west roofs keep about 83% of that. A north-facing roof keeps 60%, which is rarely worth the money. Try other angles.
Where the sun goes over Lehi
The noon sun is lower in winter, which is why the best winter tilt (65°) is steeper than the best summer tilt (11°).
Lehi's homes
Lehi has 23,886 households. 75.2% own their home, and 16,838 of those owners live in single-family houses, the kind of home that usually gets rooftop solar.
The median home here was built in 2007. Most roofs this young have years of life left, which makes them good candidates for solar.
15.5% of homes heat with electricity and 83% with gas. If you switch to a heat pump or an electric car, plan for more panels or leave room on the roof.
Source: U.S. Census Bureau, American Community Survey 2020–2024 5-year estimates.
If the power goes out in Lehi
Solar panels alone shut off in a blackout. Add a battery and they keep going. One Tesla Powerwall 3 (13.5 kWh) running a fridge, freezer, furnace fan, lights, Wi-Fi, TV and microwave (6.9 kWh a day):
Change the appliances, the battery and the weather in the battery calculator.
Questions people ask about solar in Lehi
How much do solar panels cost in Lehi?
A 6.3 kW system — enough for the average Utah home — costs about $15,750 to $23,625 before incentives, based on $2.50–$3.75 per watt. The 30% federal credit no longer applies to systems homeowners buy.
How many solar panels does a house in Lehi need?
About 15 panels of 420 watts for a home using 774 kWh a month, the Utah average. Each kilowatt of panels here makes about 1,569 kWh a year on a south-facing roof.
Is solar worth it in Lehi?
Over 25 years, solar power here costs about 9.8¢ per kWh, against 13.2¢ from the grid today. Payback is about 14.2 yrs if your utility credits exported power at the full retail rate, and 23.4 yrs if it pays about 30% of retail.
How many peak sun hours does Lehi get?
5.6 a day on panels tilted to 37°, and 4.8 on flat ground. The best month is Jun; the weakest is Dec.
What is the best angle for solar panels in Lehi?
37° for the most energy over a year, facing south. 65° is best in winter and 11° in summer. On a normal pitched roof, anything within 15° of 37° gives you about 95% of the maximum.
How long would a home battery last in a Lehi power outage?
A Tesla Powerwall 3 running a fridge, freezer, furnace fan, lights, Wi-Fi, TV and microwave (6.9 kWh a day) lasts about 43 hours with no sun. With 7 kW of solar to recharge it, it gets through a three-day outage even in overcast January.
Solar near Lehi
| City | Miles | kWh per kW | Sun hours |
|---|---|---|---|
| Saratoga Springs, UT | 6 | 1,600 | 5.6 |
| Draper, UT | 6 | 1,589 | 5.6 |
| Herriman, UT | 9 | 1,590 | 5.6 |
| Eagle Mountain, UT | 10 | 1,602 | 5.6 |
| Sandy, UT | 11 | 1,587 | 5.6 |
Lehi shares a weather-data neighbourhood with Salt Lake City; their sunshine numbers differ by less than our data can resolve. Housing, prices and outage figures are specific to Lehi.
Cities with the same sunshine as Lehi
These far-away cities get almost exactly as much solar energy per panel.
- Lawton, OK 1,577 kWh per kW
- Wichita Falls, TX 1,576 kWh per kW
- Redding, CA 1,575 kWh per kW
Snow: NASA records about 20 cm of snow on the ground here in an average January. Covered panels make little until it slides off, and these figures (like PVWatts') don't subtract that.
Sources: NASA POWER 2001–2020 monthly climatology (grid cell 33 km from Lehi's Census point), our PV model (within 1.6% of NLR PVWatts® on average), U.S. EIA prices and use, U.S. Census 2025 population estimates and ACS 2020–2024. Estimates for an average home, not a site survey. How we calculate.