A 1,800 square foot home in Utah typically uses about 809 kWh per month at the state average rate of 11.2¢/kWh (EIA). With 5.8 peak sun hours per day, most homeowners need a 5.6 kW solar system — roughly 14 panels at 400W. After the 30% federal ITC, net cost is about $11,700, with 12.4-year payback and $27,900+ in estimated 25-year savings.
Content roles: This page is your Utah-specific sizing decision for 1,800 sq ft. For national methodology and roof/orientation depth, see the 1,800 sq ft national guide. For bill-based sizing, see $125/month (~$91/mo equivalent in Utah). Policy depth: Utah solar data.
⚡ System Size
How Many Solar Panels for a 1,800 sq ft House in Utah?
Utah electricity rates and sun hours change panel count versus the US average:
System size (kW) = Annual kWh ÷ (Peak sun hours × 365 × 0.82)
For 1,800 sq ft in Utah:
Estimated monthly usage: ~809 kWh
Peak sun hours: 5.8 h/day
System size:5.6 kW (~14 × 400W panels)
Metric
Utah
US average
Rate
11.2¢/kWh
16.3¢/kWh
Sun hours
5.8 h/day
4.5 h/day
System size
5.6 kW
7.2 kW
Panels (400W)
14
19
Utah requires a smaller system than the national average for the same square footage. Use our solar system size calculator with your actual utility bills for a precise ZIP-level result.
Find your exact solar savings
Enter your ZIP code for a personalized estimate using your state's electricity rate and sun hours.
💰 System Cost
What Does Solar Cost for a 1,800 sq ft Home in Utah After the ITC?
At $3.00/W installed (SEIA 2026), a 5.6 kW system in Utah costs about $16,800 before incentives. The 30% ITC saves ~$5,040, for $11,700 net cost.
📈 Payback Period
How Long Is Solar Payback on a 1,800 sq ft Home in Utah?
A 5.6 kW system saving ~$946/year pays back in about 12.4 years after the ITC. At 3% rate escalation, 25-year utility spend totals ~$39,600 vs $11,700 net solar — $27,900+ lifetime advantage.
Solar vs utility company · 25-year comparison
Total cost of staying on the grid vs owning solar for a $300/month bill (national average assumptions).
Utah’s Residential Energy Tax Credit provides 25% of the purchase price and installation costs of a solar system (capped at $1,600 for systems under 2 kW, $2,400 for larger systems). Utah also has a Solar Property Tax Exemption and net metering policies governed by the Utah Public Service Commission.
At Utah's average rate of 11.2¢/kWh and 5.8 peak sun hours, a 1,800 sq ft home (~809 kWh/month) typically needs a 5.6 kW system — about 14 panels at 400W. See the [national 1,800 sq ft guide](/guides/how-many-solar-panels-1800-sq-ft/) for methodology.
A 5.6 kW system in Utah costs roughly $16,800 installed before incentives. The 30% federal ITC reduces net cost to about $11,700. Utah's Residential Energy Tax Credit provides 25% of the purchase price and installation costs of a solar system (capped at $1,600 for systems under 2 kW, $2,400 for larger systems). Utah also has a Solar Property Tax...
At $11,700 net cost and ~$946/year in bill savings, simple payback in Utah is about 12.4 years.
Most Utah homeowners in this size range see **$27,900+** estimated 25-year savings vs utility power. Equivalent monthly bill: **~$91** — compare the [$125/month bill guide](/guides/solar-panels-125-electric-bill/) for bill-based sizing.
The US average needs a 7.2 kW system at 11.0-year payback. Utah needs 5.6 kW with 12.4-year payback at 11.2¢/kWh and 5.8 sun hours.
$125/month electric bill by state
System size and payback vary by electricity rate and sun hours — see your state.