Solar System Sizing Tool — Knoxville, TN
Use our interactive tool to determine the right solar system size for your home in Knoxville. Adjust your monthly electricity bill and home size to see a personalized recommendation based on local solar conditions.
Size Your Solar System
$
Local rate: 13¢/kWh
ft
Peak sun hours: 4.4h/day
8.2
System Size (kW)
21
Panels Needed
378
Roof Space (sq ft)
$23,261
Est. Cost
13,108
Annual kWh
100%
Energy Offset
Energy Offset100% of your usage covered by solar
0%50%100%
How We Calculate Your System Size
Your recommended solar system size is based on several factors specific to Knoxville, TN:
- Electricity usage: Your monthly bill is converted to annual kWh consumption using the local rate of 13¢/kWh.
- Solar irradiance: Knoxville receives an average of 4.4 peak sun hours per day, which determines how much energy each panel produces.
- Panel specifications: We use 400W panels, each requiring approximately 18 sq ft of roof space, which is standard for modern residential installations.
- Roof space: The total roof area needed depends on the number of panels. The average home in Knoxville is 1,800 sq ft.
Solar at a Glance: Knoxville, TN
13¢
Avg Rate / kWh
4.4h
Peak Sun Hours / Day
8.2 kW
Avg Recommended Size
21
Avg Panels Needed
$23,261
Est. Cost (before incentives)
Knoxville Utilities Board (KUB)
Utility Provider
Other Cities in Tennessee
Related Resources
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