Solar System Sizing Tool — Madison, WI
Use our interactive tool to determine the right solar system size for your home in Madison. Adjust your monthly electricity bill and home size to see a personalized recommendation based on local solar conditions.
Size Your Solar System
$
Local rate: 16.8¢/kWh
ft
Peak sun hours: 3.9h/day
6.5
System Size (kW)
17
Panels Needed
306
Roof Space (sq ft)
$18,591
Est. Cost
9,286
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 Madison, WI:
- Electricity usage: Your monthly bill is converted to annual kWh consumption using the local rate of 16.8¢/kWh.
- Solar irradiance: Madison receives an average of 3.9 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 Madison is 1,750 sq ft.
Solar at a Glance: Madison, WI
16.8¢
Avg Rate / kWh
3.9h
Peak Sun Hours / Day
6.5 kW
Avg Recommended Size
17
Avg Panels Needed
$18,591
Est. Cost (before incentives)
Madison Gas and Electric (MG&E)
Utility Provider
Other Cities in Wisconsin
Related Resources
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